Senior Back-end Engineer (Node.js)

🏢 Summary: Senior Back-end Developer role focused on designing and implementing scalable backend systems for an InsurTech product, supporting real-time decision-making and secure data processing. The position involves working with microservices, APIs, relational databases, and cloud-based deployments in a DevOps environment. You will take ownership of architecture, testing, security, and production reliability while collaborating closely with cross-functional teams. 🗂️ Requirements: 5+ years of experience with Node.js, JavaScript, TypeScript, Practical knowledge of relational databases (PostgreSQL/MySQL/SQL Server), Experience with microservices architecture and system design patterns, Ability to design software architecture and participate in technical decisions, Experience implementing unit, integration, and end-to-end tests, Strong understanding of security best practices, Ability to deploy applications using container-based technologies, Proficiency in English (written and spoken), Availability for afternoon work hours 📃 Skills: Node.js, JavaScript, TypeScript, Nest.js, PostgreSQL, MySQL, SQL, Docker, Kubernetes, Fargate, AWS, Lambda, Microservices, REST, Testing 🏢 Description: SwingDev—a hippo company is the Polish branch of a fast-growing InsurTech product company – Hippo Insurance. We’re here to make home insurance smarter and more proactive, using tech to bring fresh solutions. We also create digital products that support our customers, always focusing on what really makes an impact. Putting a lot of effort into hiring top-tier professionals is a proof that we care a lot about tech experience, the attitude, human approach, and what we could call „culture fit”. „SwingDev is all about people” - yes, it may sound a bit cliche. But whether we're writing code or just hanging out, we know that people are at the heart of everything we do. We like to have a good time and keep things light, even when we're tackling big projects. We could brag about what’s making us special, but we’ve boiled it down to two key ingredients: mature, companionable people who, rather than compete, prefer to inspire and have each other’s backs; a culture of trust, empathy, and positivity that keeps us together, lets us interact as teammates and friends, and truly enjoy the ride. So if you're a Senior Back-end Developer looking to shake things up and have a good time while you're at it, you’ve come to the right place. 🚀 What will you do? You'll architect and implement backends and their interactions with various data stores and other APIs (including 3rd party APIs). You'll work in an agile environment focusing on projects that are impactful on our business. You'll support reliable databases and APIs for real-time automated decision-making. You'll deploy your software using industry-standard tooling like Kubernetes clusters, and Lambda functions. You'll investigate and resolve production issues by analyzing code, data, and system behavior and then propose and implement timely fixes to minimize user impact. You'll care deeply about security in everything you do and constantly raise the baseline of how we defend our user's data against external threats and themselves. You'll implement robust automated test suites to ensure high quality and low failure rate of delivered code. You'll work in a DevOps style to make sure Defense in Depth principles are followed and containers are as secure as humanly possible. You'll work closely with Product Managers, Senior Engineers and Architects to understand business processes, rules, and requirements, and turn them into high-quality code with automated tests, and deploy them to production. You'll have huge creative freedom and ability to put your mark on the project, and you will take ownership and responsibility for what you do. You’ll have a lot of chances to develop your programming skills as well as learn a lot about how tech business is done in the US. We might be a match if you… Have at least 5 years of hands-on experience with Node.js, JavaScript, and TypeScript. Possess a good, practical knowledge of at least one relational database system, e.g. PostgreSQL/MySQL/SQL Server. Are adept with microservices and system design patterns. Can engage in discussions and decisions regarding software design and architecture. Are independent problem-solver. Have the ability to convey ideas clearly across technical and non-technical teams. Can demonstrate responsibility, accountability, and a strong sense of ownership in delivering high-quality work. Have experience implementing the test pyramid (unit, integration, e2e tests). Utilize good security practices effectively. Show readiness to learn and expand your skill set as required by ongoing projects. Treat AI-assisted development as a core part of how you work – Cursor, Claude Code, Codex or similar are in your daily setup. You have strong instincts for where AI accelerates both speed and quality vs where critical judgment has to lead. Have a good command of English (written & spoken). Are available in the afternoons – we prioritize everyone’s personal time and work-life fit, but since we work in multinational teams, occasional evening meetings may be necessary to ensure smooth communication across time zones. What you'll be using after joining us: Node.js, TypeScript, Nest.js, Docker and container-based deployment technologies (e.g. Kubernetes/Fargate), Automated software testing on unit/integration/end-to-end levels. Devin, an autonomous AI engineer we work with daily to parallelize and accelerate delivery across the team. You will get extra points for: Familiarity with Docker/Kubernetes/AWS deployment processes. Experience with profiling and performance optimization. Experience in giving high quality feedback during code review. Recruitment process: Send us your CV – it's the best way for us to get to know you. Meet one of our Recruiters. Complete a 30-minute one-way interview. Join a Live Coding session with our Senior Engineers. Have a chat with your potential Engineering Manager. Meet on the final stage with Marcin and Alicja . and... welcome aboard! 👋 What benefits are waiting for you? Salary: 26 000 – 32 000 PLN + VAT on B2B. Basics 📝 Form of employment of your choosing 🌎 Remote work & flexible working hours 🏖️ Non-service days Health & Safety 💊 Private medical care with dentists & orthodontists package for you and your family ❤️ Group life insurance 🧘 Psychotherapists support — free online sessions with psychologists and psychotherapists 🤸 Home physiotherapy 🏅 Multisport card & meditation apps reimbursed 50% Working conditions & Development 💻 Gear with Apple Logo and monitor 🌱 50% reimbursement for courses, conferences, books & certificates 🇺🇸 Free access to private language lessons 🐕 6 Personal Development & 4 Voluntary Non-service days Extras you may like 🎫 Cafeteria platform — extra “stówka”every month to spend on whatever you want to 🧒 Nanny services for parents 📦 Concierge services – a personal assistant to help you to deal with your everyday matters 🎮 Chill room with table football & PlayStation 5 🍦 Free snacks, and ice cream in the office (every day, all year round!) 🍱 Free Friday Lunch in the office 🎉 Team building events — we party together several times a year during the annual Offsite & Christmas Parties, beer after work, or our #WinterEscapeMonth workation in Cyprus.

🏢 Summary: Mid Back-end Developer role focused on building and maintaining scalable backend services for an InsurTech product. The position involves developing APIs, integrating with data stores and third-party services, ensuring security, and deploying applications using modern cloud and container technologies. The role emphasizes automated testing, production reliability, and secure real-time decision-making systems. 🗂️ Requirements: Minimum 3 years experience with Node.js, Strong knowledge of JavaScript and TypeScript, Practical experience with relational databases, Ability to design and discuss software architecture, Experience implementing unit, integration, and end-to-end tests, Experience with containerization and cloud-based deployments, Knowledge of secure coding practices 📃 Skills: Node.js, JavaScript, TypeScript, Nest.js, PostgreSQL, MySQL, SQLServer, SQL, Docker, Kubernetes, Fargate, Lambda, BigQuery, Prometheus, Git, APIs, E2E 🏢 Description: SwingDev—a hippo company is the Polish branch of a fast-growing InsurTech product company – Hippo Insurance. We’re here to make home insurance smarter and more proactive, using tech to bring fresh solutions. We also create digital products that support our customers, always focusing on what really makes an impact. Putting a lot of effort into hiring top-tier professionals is a proof that we care a lot about tech experience, the attitude, human approach, and what we could call „culture fit”. „SwingDev is all about people” - yes, it may sound a bit cliche. But whether we're writing code or just hanging out, we know that people are at the heart of everything we do. We like to have a good time and keep things light, even when we're tackling big projects. We could brag about what’s making us special, but we’ve boiled it down to two key ingredients: mature, companionable people who, rather than compete, prefer to inspire and have each other’s backs; a culture of trust, empathy, and positivity that keeps us together, lets us interact as teammates and friends, and truly enjoy the ride. So if you're a Mid Back-end Developer looking to shake things up and have a good time while you're at it, you’ve come to the right place. 🚀 What will you do? You'll implement backends and their interactions with various data stores and other APIs (including 3rd party APIs). You'll work in an agile environment focusing on projects that are impactful on our business. You'll support reliable databases and APIs for real-time automated decision-making. You'll deploy your software using industry-standard tooling like Kubernetes clusters, and Lambda functions. You'll investigate and resolve production issues by analyzing code, data, and system behavior and then propose and implement timely fixes to minimize user impact. You'll care deeply about security in everything you do and constantly raise the baseline of how we defend our user's data against external threats and themselves. You'll implement robust automated test suites to ensure high quality and low failure rate of delivered code. You'll work closely with Product Managers, Senior Engineers and Architects to understand business processes, rules, and requirements, and turn them into high-quality code with automated tests, and deploy them to production. You’ll have a lot of chances to develop your programming skills as well as learn a lot about how tech business is done in the US (if you want to). We might be a match if you… Have at least 3 years of hands-on experience with Node.js, JavaScript, and TypeScript. Possess a good, practical knowledge of at least one relational database system, e.g. PostgreSQL/MySQL/SQL Server. Can engage in discussions and decisions regarding software design and architecture. Have experience implementing the test pyramid (unit, integration, e2e tests). Are a team player and a good communicator, with the ability to convey ideas clearly across technical and non-technical teams. Can demonstrate responsibility, accountability, and a strong sense of ownership in delivering high-quality work. Utilize good security practices effectively. Show readiness to learn and expand your skill set as required by ongoing projects. Have a good command of English (written & spoken). Are available in the afternoons – we prioritize everyone’s personal time and work-life fit, but since we work in multinational teams, occasional evening meetings may be necessary to ensure smooth communication across time zones. What you'll be using after joining us: Node.js, TypeScript, Nest.js, Docker and container-based deployment technologies (e.g. Kubernetes/Fargate), Automated software testing on unit/integration/end-to-end levels. You will get extra points for: Experience with data analysis and BigQuery. Familiarity with observability tools such as Prometheus. Experience with git, source control system and code reviews. Recruitment process: Send us your CV – it's the best way for us to get to know you. Meet one of our Recruiters. Complete a 30-minute one-way interview. Join a Live Coding session with our Senior Engineers. Have a chat with your potential Engineering Manager. Meet on the final stage with Marcin and Alicja . and... welcome aboard! 👋 What benefits are waiting for you? Salary: 23 000 – 26 000 PLN + VAT on B2B. Basics 📝 Form of employment of your choosing 🌎 Remote work & flexible working hours 🏖️ Non-service days Health & Safety 💊 Private medical care with dentists & orthodontists package for you and your family ❤️ Group life insurance 🧘 Psychotherapists support — free online sessions with psychologists and psychotherapists 🤸 Home physiotherapy 🏅 Multisport card & meditation apps reimbursed 50% Working conditions & Development 💻 Gear with Apple Logo and monitor 🌱 50% reimbursement for courses, conferences, books & certificates 🇺🇸 Free access to private language lessons 🐕 6 Personal Development & 4 Voluntary Non-service days Extras you may like 🎫 Cafeteria platform — extra “stówka”every month to spend on whatever you want to 🧒 Nanny services for parents 📦 Concierge services – a personal assistant to help you to deal with your everyday matters 🎮 Chill room with table football & PlayStation 5 🍦 Free snacks, and ice cream in the office (every day, all year round!) 🍱 Free Friday Lunch in the office 🎉 Team building events — we party together several times a year during the annual Offsite & Christmas Parties, beer after work, or our #WinterEscapeMonth workation in Cyprus.

🏢 Summary: Two QA Engineer roles focused on ensuring high product quality in either a front-end (Salesforce, UI testing) or back-end (API, SQL, microservices) environment. The position involves close collaboration with engineering and product teams, covering requirement analysis, test planning, execution, regression, and release sign-off. The role emphasizes manual testing expertise with growing automated test coverage and strong involvement in integration and end-to-end testing. 🗂️ Requirements: 3+ years of QA experience focused on manual testing, Knowledge of QA methodologies, tools, and processes, Experience with Black Box, White Box, and Grey Box testing, Experience with integration, functional, end-to-end, and API testing, Experience designing, executing, and reporting test cases for complex systems, Experience with test case management tools (preferably XRay), Experience with API testing using Postman or Swagger OR front-end testing with Salesforce, Understanding of microservices architecture and PostgreSQL (for back-end role), Ability to collaborate on requirement analysis and test planning, Very good English (written and spoken) 📃 Skills: QA, ManualTesting, BlackBox, WhiteBox, GreyBox, APITesting, Postman, Swagger, SQL, PostgreSQL, Microservices, Salesforce, XRay, Jira, CI/CD, Agile 🏢 Description: We’re currently hiring for two QA Engineer roles, each with a slightly different focus. One position is more front-end oriented, working closely with Salesforce and UI testing, while the other leans toward back-end, involving API testing, SQL, and a microservices-based environment. If you’re passionate about quality and enjoy working either on the user-facing side or deeper in the system architecture, we’d love to hear from you! Feel free to check out our careers page for more details on each role: https://www.swing.dev/careers About us: SwingDev—a hippo company is the Polish branch of a fast-growing InsurTech product company – Hippo Insurance. We’re here to make home insurance smarter and more proactive, using tech to bring fresh solutions. We also create digital products that support our customers, always focusing on what really makes an impact. Putting a lot of effort into hiring top-tier professionals is a proof that we care a lot about tech experience, the attitude, human approach, and what we could call „culture fit”. „SwingDev is all about people” - yes, it may sound a bit cliche. But whether we're writing code or just hanging out, we know that people are at the heart of everything we do. We like to have a good time and keep things light, even when we're tackling big projects. We could brag about what’s making us special, but we’ve boiled it down to two key ingredients: mature, companionable people who, rather than compete, prefer to inspire and have each other’s backs; a culture of trust, empathy, and positivity that keeps us together, lets us interact as teammates and friends, and truly enjoy the ride. So if you're a QA Engineer looking to shake things up and have a good time while you're at it, you’ve come to the right place. 🚀 What will you do? You'll deeply collaborate with 1-2 Engineering teams. This includes actively participating in the development of new features and initiatives, from initial requirement analysis and test planning to execution, regression testing, and final release sign-off. You'll partner closely with Product Managers. This means you will be responsible for prioritizing testing efforts, clarifying requirements, challenging assumptions from a quality perspective, coordinating Business Acceptance Testing, and advocating for the needs of our customers. You'll work closely with SDETs to expand and maintain our automated test coverage for new features and regression testing. You'll also collaborate with other manual QA engineers on cross-team and cross-BU projects. You'll proactively identify and mitigate potential risks, ensuring that our products meet the highest standards of quality and reliability. We might be a match if you… Have 3+ years of QA experience, with a focus on manual testing (Black Box, White Box, and Grey Box). Have a good knowledge of software QA methodologies, tools, and processes. Have a good understanding of testing integration, functional, end-to-end, and API tests. Have experience with test case design, execution, and reporting for complex systems (front-end and back-end). Have an ability to create test cases and collections that exercise the requirements and business rules in colaboration with PMs. Worked with test case management tools (preferably XRay). Have good analytical skills and attention to detail. Are an independent problem solver but also a collaborative team player. Have experience either with API Testing (using Postman/Swagger), microservices, PostgreSQL OR front-end testing and Salesforce (depending on the role – please visit our careers page ). Have a great command of English (written & spoken) and at least basic of Polish. Are available in the afternoons – we prioritize everyone’s personal time and work-life fit, but since we work in multinational teams, occasional evening meetings may be necessary to ensure smooth communication across time zones. You will get extra points for: Experience working in a product company, ideally a startup/scale-up. Familiarity with CI/CD pipelines and their impact on the QA process. Experience with Jira and agile testing methodologies. What benefits are waiting for you? Salary: 14 000 – 16 000 PLN + VAT on B2B or equivalent on the contract of employment Basics 📝 Form of employment of your choosing 🌎 Remote work & flexible working hours 🏖️ Non-service days Health & Safety 💊 Private medical care with dentists & orthodontists package for you and your family ❤️ Group life insurance 🧘 Psychotherapists support — free online sessions with psychologists and psychotherapists. 🤸 Home physiotherapy 🏅 Multisport card & meditation apps reimbursed 50% Working conditions & Development 💻 Gear with Apple Logo and monitor 🌱 50% reimbursement for courses, conferences, books & certificates 🇺🇸 Free access to private language lessons 🐕 6 Personal Development & 4 Voluntary Non-service days Extras you may like 🎫 Cafeteria platform — extra “stówka”every month to spend on whatever you want to 🧒 Nanny services for parents 📦 Concierge services – a personal assistant to help you to deal with your everyday matters 🎮 Chill room with table football & PlayStation 5 🍦 Free snacks, and ice cream in the office (every day, all year round!) 🍱 Free Friday Lunch in the office 🎉 Team building events — we party together several times a year during the annual Offsite & Christmas Parties, beer after work, or our #WinterEscapeMonth workation in Cyprus

🏢 Summary: Senior Backend Engineer role focused on designing and delivering secure, scalable authentication services within a distributed platform environment. The position involves working across the full software development lifecycle, contributing to architecture, DevOps practices, and production readiness. The engineer will build and maintain Java-based backend systems while supporting high engineering standards and mentoring team members. 🗂️ Requirements: Strong commercial experience in Java, Proven expertise with Spring and Spring Boot, Experience building scalable, secure backend systems in distributed environments, Hands-on experience with OAuth 2.0 and JWT, Experience designing and integrating APIs, Knowledge of clean code, testing, and code reviews, Experience with CI/CD pipelines and cloud-native development, Understanding of authentication and authorisation concepts, Ability to work in Agile and DevOps environments, Fluent English (written and spoken) 📃 Skills: Java, Spring, SpringBoot, OAuth2, JWT, API, CI/CD, DevOps, Agile, Cloud, Authentication, Authorization 🏢 Description: More about this role Everything you need to know. Overview Senior Software Engineer (Java) (Hybrid/Kraków – 1 day per week in the office) We’re Kingfisher, a team made up of over 74,000 passionate people who bring Kingfisher - and all our other brands: Castorama, B&Q, Screwfix, Brico Dépôt and Koçtaş - to life. That’s right, we’re big, but we have ambitions to become even bigger and even better. We want to become the leading home improvement company and grow the largest community of home improvers in the world. And that’s where you come in. At Kingfisher, our customers come from all walks of life, and so do we. We want to ensure that all colleagues, future colleagues, and applicants to Kingfisher are treated equally regardless of age, gender, marital or civil partnership status, colour, ethnic or national origin, culture, religious belief, philosophical belief, political opinion, disability, gender identity, gender expression or sexual orientation. We are open to flexible and agile working. Therefore, we offer colleagues a blend of working from home and our office, located in Kraków. Talk to us about how we can best support you! At Kingfisher, we value the perspectives that any new team members bring, and we want to hear from you. We encourage you to apply for one of our roles, even if you do not feel you meet 100% of the requirements. In return, we offer an inclusive environment, where what you can achieve is limited only by your imagination! We encourage new ideas, actively support experimentation, and strive to build an environment where everyone can be their best self. We offer a competitive benefit package and plenty of opportunities to stretch and grow your career: 20,000 - 28,000 PLN gross per month on an employment contract Private medical healthcare at LUXMED (including dentalcare) for you and your family Medicover sports card (Fit&More package) Life insurance financed by the employer 30-minute lunch break included in the 8-hour working day Work in a highly professional and stimulating atmosphere Training & Buddy programme that will allow you to quickly adapt to your new role Wellbeing programme for employees Co-financing of monthly tickets for the public transport in Krakow Comfortable working environment in the office and the possibility of home office Language courses, accounting courses, access to LinkedIn Learning and the possibility of co-financing studies and certification Employee referral programme What's the job About the role We are looking for a highly motivated and experienced Senior Backend Engineer to join our Software Engineering team. You will be part of a technology hub, working across the full software development lifecycle and contributing to the foundations of new platforms and capabilities. This role sits within a team responsible for authentication (AUTH) services across the group, playing a critical role in enabling secure, scalable, and reliable access to our products. As a Senior Software Engineer, you will work closely with your cross-functional team to design and implement new features and services, while bringing ideas, energy, and technical leadership to the table. If you're looking for an exciting opportunity to step out of your comfort zone and make a real impact building better software, this is the job for you! Responsibilities Design, build, and maintain secure, scalable backend services, taking solutions from concept through to production. Work closely with product, security, and engineering stakeholders to deliver high-value authentication and platform capabilities. Contribute to system and architecture design, participating in code and quality reviews to maintain high engineering standards. Apply DevOps and Agile practices, including automated testing, continuous integration, and frequent, reliable releases. Ensure services are production-ready through strong observability, monitoring, and operational support. Mentor and support other engineers, helping to build a collaborative and high-performing team. Continuously improve software quality and reliability through data-driven iteration, experimentation, and proactive problem-solving. What you'll bring Strong commercial experience in Java, with proven expertise in building production-grade backend systems using Spring / Spring Boot. Extensive experience designing and developing scalable, secure services in complex, distributed environments. Solid understanding of authentication and authorisation concepts, with hands-on experience using OAuth 2.0 and JWT. Experience working with APIs and integrating backend services within a wider platform ecosystem. Strong knowledge of software engineering best practices, including clean code, testing, and code reviews. Familiarity with DevOps and Agile ways of working, including CI/CD pipelines and cloud-native development. Ability to take technical ownership, collaborate effectively with cross-functional teams, and mentor other engineers. Excellent command of English (written and spoken) Rewards & Benefits What we offer. Private Health Care Private medical healthcare at LUXMED (including dental care) for you and your family. Child Insurance InterRisk - insurance for children. Sports Card Medicover sports card (Fit&More package). Courses Language courses, accounting courses, access to LinkedIn Learning and the possibility of co-financing studies and certification. Life Assurance Life insurance at Generali financed by the employer. Bonus Opportunity to earn annual bonus that aligns to work level of role. Parking Parking spaces and LOTOS card. Kingfisher Pension Scheme Co-financing of monthly tickets. Transport Discount Co-financing of monthly tickets for the public transport in Krakow (50% discount).

🏢 Summary: Senior Backend Engineer role focused on architecting and owning large-scale data processing systems that power commission cycles and core platform features. The position involves designing reliable data pipelines, handling complex carrier integrations, and optimizing asynchronous, event-driven architectures. You will collaborate cross-functionally to deliver scalable, high-availability backend solutions in a data-heavy environment. 🗂️ Requirements: 6+ years commercial backend development experience, Strong experience with large-scale data processing systems, Proven expertise in complex data integrations, Proficiency in Node.js, TypeScript, NestJS, PostgreSQL, Experience with asynchronous and event-driven architectures, Strong knowledge of system design patterns, Advanced SQL and PostgreSQL optimization, Ability to work with large, diverse datasets, Based in Poland with partial US time zone availability 📃 Skills: Node.js, TypeScript, NestJS, PostgreSQL, SQL, APIs, Microservices, Event-driven, Asynchronous, ETL, Indexing, Performance, Architecture, Git 🏢 Description: About First Connect: First Connect Insurance Services is a digital marketplace providing independent insurance agents access to top US carriers and the optionality necessary to grow their businesses. Agents can work with 130+ carriers, selling various insurance policies, including home, auto, small business, and more. We’re on a mission to overhaul the technology agents have access to, putting consumer-grade software at their fingertips. We’ve got thousands of active agents with hundreds joining monthly, and we plan to accelerate our growth. Role Overview: The core of our business revolves around retrieving and processing vast amounts of insurance carrier data. This isn’t just about moving numbers – this data enables our most critical platform features and powers the entire agency commission cycle. As a Senior Backend Engineer in this role, you will own this domain. We need someone who thrives in data-heavy environments and can architect systems that handle diverse data configurations and varying levels of data quality with precision. You’ll work closely with Product, Design, Business, and Finance teams to prioritize, build, and monitor the systems that form the very backbone of our business. If you’re a Senior Engineer who loves tackling complex data challenges, spotting patterns in chaos, and shaking things up, you’ve come to the right place. 🚀 What You’ll Do: Architect Data Pipelines: Design and own the systems responsible for processing massive datasets from 130+ different carriers, ensuring high availability and reliability Master Data Complexity: Build robust logic to handle various data configurations, ensuring accuracy in our crucial commission and platform features Ensure Data Quality: Implement advanced patterns and monitoring to identify and resolve data quality issues before they impact the business Scale Asynchronous Systems: Optimize our event-driven architecture to ensure seamless, real-time data processing at scale Cross-Functional Ownership: Collaborate with Finance and Business teams to translate complex data requirements into scalable technical solutions We might be a match if: You have 6+ years of commercial experience with a heavy focus on backend systems and complex data processing You have a data-heavy expertise: Proven experience in building systems that handle large, diverse datasets and complex integrations You have technical Mastery: Proficiency with Node.js, TypeScript, NestJS, and PostgreSQL You gained architectural Excellence: Strong background in asynchronous system architecture and a sharp eye for good design patterns You have a Startup Mindset: High ownership and the ability to navigate ambiguity. We are looking for people who want to build and grow, not just maintain You are based in Poland with flexibility for partial US time zone overlap You’ll get extra points for: Interest in mentoring others and stepping into a lead role Advanced SQL & Optimization: Deep knowledge of PostgreSQL performance tuning, indexing strategies, and handling large-scale datasets Recruitment process: Our goal is to be thorough while respecting your time. Send us your CV – it's the best way for us to get to know you. Meet Karolina , our Recruiter for initial interview Join a technical interview with our Team Members Meet our team for a live coding interview Talk with Michał , our Hiring Manager Join Wojtek and Ola for final stage call ... and welcome aboard! 👋 What benefits are waiting for you: Salary 26.000 PLN - 31.000 PLN net + VAT on B2B Basics 🌎 Remote work & flexible working hours 🤒 Paid sick leave 🏖️ Paid holidays Health & Safety 💊 Private medical care with dentists & orthodontists package for you and your family ❤️ Group life insurance 🧘 Psychotherapists support — free online sessions with psychologists and psychotherapists 🤸 Home physiotherapy 🏅 Multisport card & meditation apps reimbursed 50% Working conditions & Development 💻 Gear with Apple Logo and a nice Dell monitor 🌱 50% reimbursement for courses, conferences, books & certificates 🇺🇸 Free access to private language lessons 🐕 6 Personal Development Days & 4 Voluntary Days Off Extras you may like 🎫 Cafeteria platform — extra “stówka”every month to spend on whatever you want to 🧒 Nanny services for parents 📦 Concierge services – a personal assistant to help you to deal with your everyday matters 🎉 Team building events — we party together several times a year during the annual Offsite & Christmas Parties, or our workation week in Mediterranean

🏢 Summary: Senior Backend Engineer role focused on architecting and owning large-scale data processing systems that power commission cycles and core platform features. The position centers on building reliable, event-driven pipelines handling complex, high-volume insurance carrier data. You will design scalable backend architectures and ensure high data quality across diverse integrations. 🗂️ Requirements: 6+ years commercial experience in backend development, Experience building systems handling large, diverse datasets, Strong experience with complex data processing and integrations, Proficiency in Node.js and TypeScript, Experience with NestJS framework, Experience with PostgreSQL, Strong knowledge of asynchronous and event-driven architectures, Ability to design scalable system architectures, Experience with data quality monitoring and optimization, Based in Poland with partial US timezone overlap 📃 Skills: Node.js, TypeScript, NestJS, PostgreSQL, SQL, Architecture, Asynchronous, Event-driven, Data-processing, ETL 🏢 Description: About First Connect: First Connect Insurance Services is a digital marketplace providing independent insurance agents access to top US carriers and the optionality necessary to grow their businesses. Agents can work with 130+ carriers, selling various insurance policies, including home, auto, small business, and more. We’re on a mission to overhaul the technology agents have access to, putting consumer-grade software at their fingertips. We’ve got thousands of active agents with hundreds joining monthly, and we plan to accelerate our growth. Role Overview: The core of our business revolves around retrieving and processing vast amounts of insurance carrier data. This isn’t just about moving numbers – this data enables our most critical platform features and powers the entire agency commission cycle. As a Senior Backend Engineer in this role, you will own this domain. We need someone who thrives in data-heavy environments and can architect systems that handle diverse data configurations and varying levels of data quality with precision. You’ll work closely with Product, Design, Business, and Finance teams to prioritize, build, and monitor the systems that form the very backbone of our business. If you’re a Senior Engineer who loves tackling complex data challenges, spotting patterns in chaos, and shaking things up, you’ve come to the right place. 🚀 What You’ll Do: Architect Data Pipelines: Design and own the systems responsible for processing massive datasets from 130+ different carriers, ensuring high availability and reliability Master Data Complexity: Build robust logic to handle various data configurations, ensuring accuracy in our crucial commission and platform features Ensure Data Quality: Implement advanced patterns and monitoring to identify and resolve data quality issues before they impact the business Scale Asynchronous Systems: Optimize our event-driven architecture to ensure seamless, real-time data processing at scale Cross-Functional Ownership: Collaborate with Finance and Business teams to translate complex data requirements into scalable technical solutions We might be a match if: You have 6+ years of commercial experience with a heavy focus on backend systems and complex data processing You have a data-heavy expertise: Proven experience in building systems that handle large, diverse datasets and complex integrations You have technical Mastery: Proficiency with Node.js, TypeScript, NestJS, and PostgreSQL You gained architectural Excellence: Strong background in asynchronous system architecture and a sharp eye for good design patterns You have a Startup Mindset: High ownership and the ability to navigate ambiguity. We are looking for people who want to build and grow, not just maintain You are based in Poland with flexibility for partial US time zone overlap You’ll get extra points for: Interest in mentoring others and stepping into a lead role Advanced SQL & Optimization: Deep knowledge of PostgreSQL performance tuning, indexing strategies, and handling large-scale datasets Recruitment process: Our goal is to be thorough while respecting your time. Send us your CV – it's the best way for us to get to know you. Meet Karolina , our Recruiter for initial interview Join a technical interview with our Team Members Meet our team for a live coding interview Talk with Michał , our Hiring Manager Join Wojtek and Ola for final stage call ... and welcome aboard! 👋 What benefits are waiting for you: Salary 26.000 PLN - 31.000 PLN net + VAT on B2B Basics 🌎 Remote work & flexible working hours 🤒 Paid sick leave 🏖️ Paid holidays Health & Safety 💊 Private medical care with dentists & orthodontists package for you and your family ❤️ Group life insurance 🧘 Psychotherapists support — free online sessions with psychologists and psychotherapists 🤸 Home physiotherapy 🏅 Multisport card & meditation apps reimbursed 50% Working conditions & Development 💻 Gear with Apple Logo and a nice Dell monitor 🌱 50% reimbursement for courses, conferences, books & certificates 🇺🇸 Free access to private language lessons 🐕 6 Personal Development Days & 4 Voluntary Days Off Extras you may like 🎫 Cafeteria platform — extra “stówka”every month to spend on whatever you want to 🧒 Nanny services for parents 📦 Concierge services – a personal assistant to help you to deal with your everyday matters 🎉 Team building events — we party together several times a year during the annual Offsite & Christmas Parties, or our workation week in Mediterranean

🏢 Summary: Senior Backend Engineer role focused on designing and delivering a greenfield Loyalty Platform using Java and Spring, working across the full software development lifecycle in a hybrid model. The position involves shaping backend architecture, building scalable distributed services, and ensuring production readiness in AWS environments. 🗂️ Requirements: Extensive experience in backend development with Java, Commercial experience with Kotlin, Strong knowledge of Spring framework, Experience designing scalable and maintainable distributed systems, Hands-on experience with AWS environments, Experience with automated testing and continuous integration, Ability to work in Agile cross-functional teams, Fluent English (written and spoken) 📃 Skills: Java, Kotlin, Spring, AWS, CI, Testing, Microservices, DistributedSystems, REST, Git 🏢 Description: More about this role Everything you need to know. Overview Senior Software Engineer (Java/Kotlin) (Hybrid/Kraków – 1 day per week in the office) We’re Kingfisher, a team made up of over 74,000 passionate people who bring Kingfisher - and all our other brands: Castorama, B&Q, Screwfix, Brico Dépôt and Koçtaş - to life. That’s right, we’re big, but we have ambitions to become even bigger and even better. We want to become the leading home improvement company and grow the largest community of home improvers in the world. And that’s where you come in. At Kingfisher, our customers come from all walks of life, and so do we. We want to ensure that all colleagues, future colleagues, and applicants to Kingfisher are treated equally regardless of age, gender, marital or civil partnership status, colour, ethnic or national origin, culture, religious belief, philosophical belief, political opinion, disability, gender identity, gender expression or sexual orientation. We are open to flexible and agile working. Therefore, we offer colleagues a blend of working from home and our office, located in Kraków. Talk to us about how we can best support you! At Kingfisher, we value the perspectives that any new team members bring, and we want to hear from you. We encourage you to apply for one of our roles, even if you do not feel you meet 100% of the requirements. In return, we offer an inclusive environment, where what you can achieve is limited only by your imagination! We encourage new ideas, actively support experimentation, and strive to build an environment where everyone can be their best self. We offer a competitive benefit package and plenty of opportunities to stretch and grow your career: 20,000 - 28,000 PLN gross per month on an employment contract Private medical healthcare at LUXMED (including dentalcare) for you and your family Medicover sports card (Fit&More package) Life insurance financed by the employer 30-minute lunch break included in the 8-hour working day Work in a highly professional and stimulating atmosphere Training & Buddy programme that will allow you to quickly adapt to your new role Wellbeing programme for employees Co-financing of monthly tickets for the public transport in Krakow Comfortable working environment in the office and the possibility of home office Language courses, accounting courses, access to LinkedIn Learning and the possibility of co-financing studies and certification Employee referral programme What's the job About the role We are looking for a highly motivated and experienced Senior Backend Engineer to join our Software Engineering team. You will be working across the full software development lifecycle and contributing to the design and delivery of a greenfield Loyalty Platform built using Java and the Spring ecosystem. In this role, you will help shape the core backend services that power our loyalty capabilities, working closely with product managers, engineers, and other stakeholders to turn ideas into scalable, high-quality solutions. You will be involved from early design and architectural decisions through to implementation and production readiness. If you're looking for an exciting opportunity to step out of your comfort zone and make a real impact building better software, this is the job for you! Responsibilities Build and evolve backend components that form the core of a new Loyalty Platform, using Java and Spring. Lead the delivery of backend solutions, contributing from early technical discovery through implementation and live operation. Work closely with product and engineering partners to shape requirements and turn them into robust, scalable services. Influence platform architecture and technical standards as the system is being designed and grown from the ground up. Maintain a strong focus on code quality, reliability, and performance through testing, reviews, and continuous refinement. Support modern delivery practices, including continuous integration, automated deployments, and iterative releases. Ensure services are resilient and operable in production, with appropriate logging, monitoring, and support processes in place. Act as a senior technical contributor within the team, sharing knowledge, supporting less experienced engineers, and raising the overall engineering bar. What you'll bring Extensive hands-on experience delivering backend solutions in Java, with exposure to Kotlin in commercial or production settings. Strong practical knowledge of the Spring framework, with the ability to apply common design patterns to solve complex engineering problems. Experience designing backend systems with scalability and maintainability in mind, including service-based and distributed architectures. Practical experience working in AWS environments, covering application deployment, configuration, and day-to-day operation. Familiarity with modern software delivery approaches, such as automated testing, continuous integration, and incremental releases. Confidence contributing to technical discussions and shaping implementation approaches, particularly in early-stage or greenfield projects. A pragmatic engineering mindset, balancing clean design with delivery, performance, and operational considerations. Strong collaboration skills and experience working within Agile, cross-disciplinary teams. Excellent command of English (written and spoken) Rewards & Benefits What we offer. Private Health Care Private medical healthcare at LUXMED (including dental care) for you and your family. Child Insurance InterRisk - insurance for children. Sports Card Medicover sports card (Fit&More package). Courses Language courses, accounting courses, access to LinkedIn Learning and the possibility of co-financing studies and certification. Life Assurance Life insurance at Generali financed by the employer. Bonus Opportunity to earn annual bonus that aligns to work level of role. Parking Parking spaces and LOTOS card. Kingfisher Pension Scheme Co-financing of monthly tickets. Transport Discount Co-financing of monthly tickets for the public transport in Krakow (50% discount).

🏢 Summary: Senior Software Engineer role focused on designing and building scalable, resilient systems that power a high-traffic product used by thousands of daily users. The position involves leading architecture decisions, owning projects end-to-end, and driving technical excellence across the engineering team. The engineer will also mentor others and contribute to AI-driven improvements while working primarily with Ruby. 🗂️ Requirements: 5+ years of professional software engineering experience, Experience building scalable and resilient applications, Experience with system design and architectural decision-making, Ability to lead projects from design to production and monitoring, Experience mentoring junior engineers, Fluency in Polish, Fluency in English, Willingness to learn and work with Ruby 📃 Skills: Ruby, Architecture, Scalability, SystemDesign, DataModeling, Deployment, Monitoring, Security, Performance, AI, English, Polish, Mentoring 🏢 Description: Who are we? Founded in 2013, Housecall Pro helps home service professionals (Pros) streamline every aspect of their business. With easy-to-use tools for scheduling, dispatching, payments, and more, Housecall Pro enables Pros to save time, grow profitably, and provide best-in-class service. Housecall Pro’s brand portfolio includes Business Coaching by Housecall Pro, a business coaching solution for home services businesses. Our brands are united by a singular mission to champion our Pros to success.We support more than 40,000 businesses and have over 1,800 ambitious, mission-driven, genuinely fun-loving teammates across the globe (half of the engineering team is in Poland 🇵🇱). If you want to do work that impacts real people, supported by a team that will invest in you every step of the way, we’d love to hear from you. Housecall Pro celebrates diversity, and we are committed to creating an inclusive environment. We are an equal opportunity employer and do not discriminate on the basis of gender, race, religion, national origin, ethnicity, disability, gender identity/expression, sexual orientation, veteran or military status, or any other category protected under the law. About the role As a Senior Software Engineer, you bring strong engineering fundamentals, deep problem-solving ability, and the capacity to navigate complex systems with clarity and intention. You focus on systems thinking, scalable architecture, and writing clean, maintainable code that delivers meaningful value to our customers. In this role, you will lead technical decision-making, drive projects from design through production operations, and collaborate closely with product, design, and engineering partners to shape impactful user experiences. You will help define and champion technical best practices, elevate the quality of our systems, and mentor fellow engineers as the team continues to grow. Our engineering culture is passionate, empathetic, and driven by a shared mission: improving the lives of our service professionals, our Pros. Your contributions will play a critical role in enabling their success and strengthening the foundation of our product for years to come. Compensation: 6,500 - 8,000 USD per month (B2B) We also offer: Paid time off Flexible work hours 100% remote work Equity shares in a rapidly growing company backed by top-tier VCs A culture built on innovation that values big ideas We work in Central European Time Newest MacBook + Setup Fee ($500) What you’ll do Build a product that improves users’ lives (75k unique daily users, 4.6 ⭐at App Store) 👉 Learn more about the HCP product Lead architecture discussions and drive system design, data modeling, and service reliability implementations that strengthen our platform Own projects end-to-end, from architecture and implementation to deployment and monitoring Collaborate closely with product, design, and engineering to deliver high-quality, maintainable, and high-performance software solutions Define and champion technical direction, standards, and best practices as we scale Continuously learn, share knowledge, and mentor developers across your team, giving feedback to junior developers and peers on technical designs, merge requests, and other areas Deliver solutions that underscore performance, stability, extensibility, supportability and security Lead AI tool adoption strategies and encourage best practices across your team What you bring 5+ years of professional software engineering experience Experience designing and building resilient and highly scalable applications Experience mentoring and coaching less experienced engineers Ability to operate independently, make sound architectural decisions, and deliver in fast-moving environments Product-first mindset with a focus on delivering business and user value Interest in leveraging AI technologies to enhance productivity, quality, and innovation This position requires fluency in both Polish and English How we work 📌 Our primary technology stack at HCP is Ruby. To be effective in this role, you’ll need to learn it . We offer support in the learning process, tailored to your needs and any prior experience with Ruby. This may include mentoring from our experienced engineering team or access to a paid online course that you can complete during working hours as part of your onboarding. The exact form of support will be agreed upon based on insights from your selection process. Sounds interesting? We're waiting for your resume! This role is open to candidates in Poland . The specific salary for the successful candidate will be determined based on permissible, non-discriminatory factors such as skills and experience.

🏢 Summary: Senior Software Engineer role focused on designing and delivering scalable, resilient systems, leading architecture decisions, and owning projects end-to-end in a high-impact product environment. The position involves driving technical standards, mentoring engineers, and contributing to system reliability, performance, and security. The role supports remote work (Poland) with a B2B contract and competitive monthly compensation. 🗂️ Requirements: 5+ years of professional software engineering experience, Experience designing and building scalable and resilient applications, Ability to lead architecture and system design decisions, Experience mentoring junior engineers, Ability to independently own projects end-to-end, Fluency in Polish, Fluency in English, Willingness to learn and work with Ruby 📃 Skills: Ruby, Architecture, SystemDesign, DataModeling, Scalability, Reliability, Monitoring, AI, Git, CI/CD 🏢 Description: Who are we? Founded in 2013, Housecall Pro helps home service professionals (Pros) streamline every aspect of their business. With easy-to-use tools for scheduling, dispatching, payments, and more, Housecall Pro enables Pros to save time, grow profitably, and provide best-in-class service. Housecall Pro’s brand portfolio includes Business Coaching by Housecall Pro, a business coaching solution for home services businesses. Our brands are united by a singular mission to champion our Pros to success.We support more than 40,000 businesses and have over 1,800 ambitious, mission-driven, genuinely fun-loving teammates across the globe (half of the engineering team is in Poland 🇵🇱). If you want to do work that impacts real people, supported by a team that will invest in you every step of the way, we’d love to hear from you. Housecall Pro celebrates diversity, and we are committed to creating an inclusive environment. We are an equal opportunity employer and do not discriminate on the basis of gender, race, religion, national origin, ethnicity, disability, gender identity/expression, sexual orientation, veteran or military status, or any other category protected under the law. About the role As a Senior Software Engineer, you bring strong engineering fundamentals, deep problem-solving ability, and the capacity to navigate complex systems with clarity and intention. You focus on systems thinking, scalable architecture, and writing clean, maintainable code that delivers meaningful value to our customers. In this role, you will lead technical decision-making, drive projects from design through production operations, and collaborate closely with product, design, and engineering partners to shape impactful user experiences. You will help define and champion technical best practices, elevate the quality of our systems, and mentor fellow engineers as the team continues to grow. Our engineering culture is passionate, empathetic, and driven by a shared mission: improving the lives of our service professionals, our Pros. Your contributions will play a critical role in enabling their success and strengthening the foundation of our product for years to come. Compensation: 6,500 - 8,000 USD per month (B2B) We also offer: Paid time off Flexible work hours 100% remote work Equity shares in a rapidly growing company backed by top-tier VCs A culture built on innovation that values big ideas We work in Central European Time Newest MacBook + Setup Fee ($500) What you’ll do Build a product that improves users’ lives (75k unique daily users, 4.6 ⭐at App Store) 👉 Learn more about the HCP product Lead architecture discussions and drive system design, data modeling, and service reliability implementations that strengthen our platform Own projects end-to-end, from architecture and implementation to deployment and monitoring Collaborate closely with product, design, and engineering to deliver high-quality, maintainable, and high-performance software solutions Define and champion technical direction, standards, and best practices as we scale Continuously learn, share knowledge, and mentor developers across your team, giving feedback to junior developers and peers on technical designs, merge requests, and other areas Deliver solutions that underscore performance, stability, extensibility, supportability and security Lead AI tool adoption strategies and encourage best practices across your team What you bring 5+ years of professional software engineering experience Experience designing and building resilient and highly scalable applications Experience mentoring and coaching less experienced engineers Ability to operate independently, make sound architectural decisions, and deliver in fast-moving environments Product-first mindset with a focus on delivering business and user value Interest in leveraging AI technologies to enhance productivity, quality, and innovation This position requires fluency in both Polish and English How we work 📌 Our primary technology stack at HCP is Ruby. To be effective in this role, you’ll need to learn it . We offer support in the learning process, tailored to your needs and any prior experience with Ruby. This may include mentoring from our experienced engineering team or access to a paid online course that you can complete during working hours as part of your onboarding. The exact form of support will be agreed upon based on insights from your selection process. Sounds interesting? We're waiting for your resume! This role is open to candidates in Poland . The specific salary for the successful candidate will be determined based on permissible, non-discriminatory factors such as skills and experience.

🏢 Summary: Senior Software Engineer role focused on leading architecture, designing scalable systems, and delivering high-quality software for a high-traffic product. The position involves end-to-end ownership from design to deployment, mentoring engineers, and driving technical standards. The role requires working with Ruby and contributing to AI adoption strategies within a remote engineering team. 🗂️ Requirements: 5+ years software engineering experience, Experience building scalable and resilient applications, Ability to design system architecture, Experience with data modeling, Experience mentoring engineers, Ability to lead projects end-to-end, Fluency in Polish, Fluency in English, Willingness to learn Ruby 📃 Skills: Ruby, Architecture, Scalability, DataModeling, Deployment, Monitoring, AI, English, Polish 🏢 Description: Who are we? Founded in 2013, Housecall Pro helps home service professionals (Pros) streamline every aspect of their business. With easy-to-use tools for scheduling, dispatching, payments, and more, Housecall Pro enables Pros to save time, grow profitably, and provide best-in-class service. Housecall Pro’s brand portfolio includes Business Coaching by Housecall Pro, a business coaching solution for home services businesses. Our brands are united by a singular mission to champion our Pros to success.We support more than 40,000 businesses and have over 1,800 ambitious, mission-driven, genuinely fun-loving teammates across the globe (half of the engineering team is in Poland 🇵🇱). If you want to do work that impacts real people, supported by a team that will invest in you every step of the way, we’d love to hear from you. Housecall Pro celebrates diversity, and we are committed to creating an inclusive environment. We are an equal opportunity employer and do not discriminate on the basis of gender, race, religion, national origin, ethnicity, disability, gender identity/expression, sexual orientation, veteran or military status, or any other category protected under the law. About the role As a Senior Software Engineer, you bring strong engineering fundamentals, deep problem-solving ability, and the capacity to navigate complex systems with clarity and intention. You focus on systems thinking, scalable architecture, and writing clean, maintainable code that delivers meaningful value to our customers. In this role, you will lead technical decision-making, drive projects from design through production operations, and collaborate closely with product, design, and engineering partners to shape impactful user experiences. You will help define and champion technical best practices, elevate the quality of our systems, and mentor fellow engineers as the team continues to grow. Our engineering culture is passionate, empathetic, and driven by a shared mission: improving the lives of our service professionals, our Pros. Your contributions will play a critical role in enabling their success and strengthening the foundation of our product for years to come. Compensation: 6,500 - 8,000 USD per month (B2B) We also offer: Paid time off Flexible work hours 100% remote work Equity shares in a rapidly growing company backed by top-tier VCs A culture built on innovation that values big ideas We work in Central European Time Newest MacBook + Setup Fee ($500) What you’ll do Build a product that improves users’ lives (75k unique daily users, 4.6 ⭐at App Store) 👉 Learn more about the HCP product Lead architecture discussions and drive system design, data modeling, and service reliability implementations that strengthen our platform Own projects end-to-end, from architecture and implementation to deployment and monitoring Collaborate closely with product, design, and engineering to deliver high-quality, maintainable, and high-performance software solutions Define and champion technical direction, standards, and best practices as we scale Continuously learn, share knowledge, and mentor developers across your team, giving feedback to junior developers and peers on technical designs, merge requests, and other areas Deliver solutions that underscore performance, stability, extensibility, supportability and security Lead AI tool adoption strategies and encourage best practices across your team What you bring 5+ years of professional software engineering experience Experience designing and building resilient and highly scalable applications Experience mentoring and coaching less experienced engineers Ability to operate independently, make sound architectural decisions, and deliver in fast-moving environments Product-first mindset with a focus on delivering business and user value Interest in leveraging AI technologies to enhance productivity, quality, and innovation This position requires fluency in both Polish and English How we work 📌 Our primary technology stack at HCP is Ruby. To be effective in this role, you’ll need to learn it . We offer support in the learning process, tailored to your needs and any prior experience with Ruby. This may include mentoring from our experienced engineering team or access to a paid online course that you can complete during working hours as part of your onboarding. The exact form of support will be agreed upon based on insights from your selection process. Sounds interesting? We're waiting for your resume! This role is open to candidates in Poland . The specific salary for the successful candidate will be determined based on permissible, non-discriminatory factors such as skills and experience.