Senior Backend Engineer (Java)

🏢 Summary: Backend Software Engineer role focused on building efficient, scalable server-side applications across diverse client domains, contributing to product innovation and improving engineering standards within a collaborative, cross-functional team. The position involves working with modern Java-based frameworks, cloud infrastructure, and DevOps tooling in a remote-first environment. Candidates will support the full software lifecycle from development to deployment and operations. 🗂️ Requirements: 3+ years hands-on software engineering experience, Experience developing business applications using Java or Kotlin, Experience with Spring, Quarkus, or Micronaut frameworks, Experience with Hibernate and JPA, Experience with logging and telemetry frameworks, Experience with Jenkins, Docker, and Git, Proficiency with Linux command line and scripting, Experience designing for and working with AWS, Experience delivering and operating critical software systems, Fluency in written and spoken English, Based in Poland, Slovakia, or Hungary 📃 Skills: Java, Kotlin, Spring, Quarkus, Micronaut, Hibernate, JPA, Jenkins, Docker, Git, Linux, AWS, Camunda, Telemetry, Scripting 🏢 Description: Sonalake is a software partnering company that helps our clients realise their product roadmaps. Product design and engineering are at the heart of our business. Our engineering teams work with clients right across the stack; UX, UI design, frontend, backend, analytics, infrastructure, operations - and everything else that goes into delivering great products. We thrive on variety and are highly adaptable. Our teams are exposed to domains as varied as telecom billing, ad tech, securities-based lending, travel tech analytics, and many more. Innovation is central to our mission; anticipating future client needs, analysing emerging technologies and developing new products and services. We are now seeking to grow our backend team capability to support the development of our products. That’s where you come in! You will Develop rock solid efficient server-side applications Write clean, readable, well-commented, maintainable code Work as part of a multi-disciplinary team with designers and other developers Contribute to product innovation and our open source projects Help evolve and improve our development standards, tooling, and processes You may be a fit for this role if you Have 3+ years hands-on software engineering experience Have developed business applications using some of the following technologies Java, Kotlin Spring, Quarkus, Micronaut Hibernate, JPA, logging and telemetry frameworks Worked with Jenkins, Docker, Git and are very comfortable working from the Linux command line and with scripting languages Have experience designing for and working with Amazon Web Services Worked on teams that have shipped and operated critical software systems Take pride in working on projects to successful completion involving a wide variety of technologies and systems Thrive in a collaborative environment involving different stakeholders and subject matter experts Are a great communicator in English - both written and spoken Thrive on a high level of autonomy and responsibility within a knowledge sharing culture Are based in Poland, Slovakia, or Hungary Experience with Camunda 7 is a big plus What's in it for you? Remote-first approach with many team-building activities. You can work from our offices in Dublin, Poznan or Bratislava, or work on a fully remote or hybrid basis. We believe in a healthy work-life balance Every Sonalaker gets a training budget and paid training days every year to upskill. This covers courses, training, books or conferences We’ve a flat organisational structure with an emphasis on open, honest communication. There are no siloes, no hierarchies and no barriers We focus on innovation: we run projects to evaluate new frameworks, create tools for internal use, contribute to the open source community and research new ways to use existing products in new problem domains Indefinite period employment contract We take pride in being a people-oriented company. Openness and opportunity are really important to us. We build teams that span from experienced leaders to bright graduates and work to develop all of us within our coaching culture.

🏢 Summary: Full-time Software Engineer role focused on building secure, scalable backend systems and APIs on AWS using TypeScript. The position involves end-to-end ownership of automated systems that detect misuse and enforce platform policies, working across the full development lifecycle. Ideal for engineers passionate about backend stability, cloud architecture, and high-quality code. 🗂️ Requirements: 3+ years of professional backend development experience, Strong proficiency in JavaScript, TypeScript, and Node.js, Experience building and consuming RESTful or GraphQL APIs, Experience with core AWS services (Lambda, SQS, SNS, API Gateway, S3), Experience with Docker containerization, Experience with NoSQL or relational databases, Understanding of web security principles and best practices, Upper-intermediate or higher English level 📃 Skills: JavaScript, TypeScript, Node.js, AWS, Lambda, SQS, SNS, APIGateway, S3, REST, GraphQL, Docker, MongoDB, DynamoDB, PostgreSQL, Security, CI/CD, Jenkins, GitLab, GitHubActions, React, CloudWatch, Datadog, .NET, Python, GCP, BigQuery 🏢 Description: Salary range: B2B - 30 E/h + VAT 💰 Ciklum is looking for a Software Engineer to join our team full-time in Poland. We are a custom product engineering company that supports both multinational organizations and scaling startups to solve their most complex business challenges. With a global team of over 4,000 highly skilled developers, consultants, analysts and product owners, we engineer technology that redefines industries and shapes the way people live. About the role: As a Software Engineer, you will be part of a cross-functional team with full ownership of the product and codebase. You will join a team specifically focused on businesses, building automated systems that detect misuse and enforce platform policies. You will participate in all stages of the development lifecycle: from ideation and design to implementation, deployment, and maintenance. This role is ideal for an engineer with a strong passion for backend stability and scalability who enjoys building robust cloud architectures. Responsibilities: Develop and maintain secure, scalable APIs and services on AWS using TypeScript Write clean, efficient, and testable code for both backend and frontend applications Collaborate closely with senior engineers, product managers, and designers to translate requirements into technical solutions Implement security best practices in your code to protect user data and ensure platform integrity Contribute to the entire development lifecycle, from planning and implementation to deployment and maintenance Troubleshoot, debug, and upgrade existing software to enhance functionality and performance Participate actively in code reviews, providing and receiving constructive feedback to maintain a high-quality codebase Requirements: 3+ years of professional experience in backend development Strong proficiency with JavaScript, TypeScript and Node.js Experience building and consuming RESTful or GraphQL APIs Experience with core AWS services (e.g., Lambda, SQS, SNS, API Gateway, S3) Familiarity with containerization using Docker Experience with NoSQL (e.g., MongoDB, DynamoDB) and/or relational (e.g., PostgreSQL) databases A good understanding of web security principles and best practices Strong problem-solving skills and a passion for writing quality code Upper-intermediate or higher level of spoken and written English Desirable: Hands-on expertise with React Familiarity with CI/CD practices and tools (e.g., Jenkins, GitLab CI, GitHub Actions) Experience with monitoring and logging tools (e.g., CloudWatch, Datadog) Working experience with .Net or Python is a plus Experience with GCP and services like BigQuery Personal skills: Accountability: You take ownership and follow through on your responsibilities Drive: You're proactive and results-oriented, always seeking better ways to solve problems Self-development: You stay curious, seek feedback, and aim for continuous improvement Effective communication: You communicate your ideas clearly and collaborate effectively in a team Mentoring: You're open to helping less experienced team members and sharing knowledge What`s in it for you? Strong community: Work alongside top professionals in a friendly, open-door environment Growth focus: Take on large-scale projects with a global impact and expand your expertise Tailored learning: Boost your skills with internal events (meetups, conferences, workshops), Udemy access, language courses, and company-paid certifications Endless opportunities: Explore diverse domains through internal mobility, finding the best fit to gain hands-on experience with cutting-edge technologies Flexibility: Enjoy flexibility – full remote working possibilities Care: We’ve got you covered with company-paid medical insurance, mental health support, and financial & legal consultations About us: At Ciklum, we are always exploring innovations, empowering each other to achieve more, and engineering solutions that matter. With us, you’ll work with cutting-edge technologies, contribute to impactful projects, and be part of a One Team culture that values collaboration and progress. With delivery centers in Wrocław and Gdańsk, our 300+ professionals in Poland drive forward-thinking solutions for global clients. Join a community where collaboration sparks innovation—and your impact reaches millions. Want to learn more about us? Follow us on Instagram , Facebook , LinkedIn . Explore, empower, engineer with Ciklum! Interested already? We would love to get to know you! Submit your application. We can’t wait to see you at Ciklum.

🏢 Summary: Remote Full-Stack Software Engineer role focused on designing, building, and maintaining scalable web applications using modern backend and frontend technologies. The position involves end-to-end feature ownership, customer collaboration, and development of secure, high-performance systems. The engineer will work with Python, FastAPI, React, and cloud-native tools in a distributed team. 🗂️ Requirements: Approximately 5 years of professional software development experience, Strong backend development experience with Python and FastAPI, Experience with NGINX, Strong frontend development skills with React and TypeScript, Experience with Vite, Experience with MSSQL, Experience with SQLAlchemy, Hands-on experience with Docker, Hands-on experience with Kubernetes, Experience designing and consuming REST APIs, Experience with relational databases, Ability to design secure, scalable systems, Fluent English communication skills, EU citizenship, Residence in Poland 📃 Skills: Python, FastAPI, NGINX, React, TypeScript, Vite, MSSQL, SQLAlchemy, Docker, Kubernetes, REST, SQL, CI/CD, Cloud 🏢 Description: In Cyclad we work with top international IT companies in order to boost their potential in delivering outstanding, cutting-edge technologies that shape the world of the future. We are seeking a highly experienced Full-Stack Software Engineer to join a remote development team. The role focuses on designing, building, and maintaining scalable web applications using modern backend and frontend technologies. The ideal candidate is autonomous, proactive, and comfortable working directly with customers to translate business needs into robust technical solutions. Project information: Type of project: IT Services Office location: Poland Work mode: Remote Budget: 140-160 PLN net /h - b2b Only candidates with citizenship in the European Union and residence in Poland Start date: ASAP (depending on candidate availability) Project scope: Design, develop, and maintain backend services and REST APIs using Python and FastAPI Build modern, responsive frontend applications using React, TypeScript, and Vite Own features end-to-end, from backend logic to frontend user interfaces Collaborate directly with customers and stakeholders to gather requirements and provide technical guidance Design and optimize database schemas and queries using MSSQL and SQLAlchemy Deploy, operate, and maintain applications using Docker and Kubernetes Ensure best practices in security, performance, scalability, and maintainability Participate in architecture discussions and contribute to technical decision-making Troubleshoot production issues and provide reliable operational support Work closely with product, design, and engineering teams to deliver high-quality solutions on time Requirements: Approximately 5 years of professional software development experience Strong autonomy and ability to manage tasks with minimal supervision Proven experience in customer-facing or stakeholder-facing roles Solid backend development experience with Python, FastAPI, and NGINX Strong frontend development skills with React, TypeScript, and Vite Experience working with relational databases, particularly MSSQL, and ORM tools like SQL Alchemy Hands-on experience with containerization and orchestration tools such as Docker and Kubernetes Understanding of secure, scalable, and maintainable system design Experience in cloud environments (optional) Knowledge of CI/CD pipelines and DevOps best practices (optional) Experience working in agile or product-driven teams (optional) Strong verbal and written communication skills in English Self-driven, accountable, and results-oriented Comfortable working directly with customers and taking ownership of delivered solutions Team-oriented mindset with a proactive approach to problem-solving We offer: Remote working model Full-time job agreement based on b2b contract Private medical care with dental care (covering 70% of costs) + rehabilitation package. Family package option possible Multisport card (also for an accompanying person) Life insurance

🏢 Summary: Senior Software Engineer role focused on building and modernizing strategic backend platforms that connect operational and regulatory systems, supporting a multiyear cloud migration roadmap. The position involves designing scalable, data-driven solutions in Java within an Agile team, leveraging cloud and DevOps practices. The role follows a hybrid model with 3 days per week onsite in Wroclaw or Krakow. 🗂️ Requirements: Bachelor’s degree in Computer Science or relevant certification, Strong back-end development experience in Java, Experience with DevOps CI/CD pipelines, Hands-on experience with Azure DevOps, GitHub, or GitLab, Practical experience with Test-Driven Development (TDD), Experience delivering solutions on Azure, AWS, or GCP, Solid understanding of cloud architecture, Knowledge of software design principles, Experience with data streaming and real-time or batch processing 📃 Skills: Java, Azure, AWS, GCP, CI/CD, AzureDevOps, GitHub, GitLab, TDD, Databricks, Kubernetes, DataStreaming, BatchProcessing, Cloud, DevOps 🏢 Description: We are looking for a Senior Software Engineer to join an agile team focused on developing strategic technology solutions that connect operations and regulatory systems. Our work plays a crucial role in enabling the client to meet regulatory obligations and unlock value from its wealth of data. The project is part of a multiyear roadmap to migrate to cloud technology and enhance existing platforms. You’ll work in a small, autonomous Agile team with colleagues across global locations, in an inclusive and collaborative environment. If you are passionate about innovation and continuous learning, we want to hear from you. This role offers a hybrid model, with 3 days per week working from the client's office in Wroclaw or Krakow. Responsibilities Design and develop strategic platform features that enable seamless trade execution flows between core systems, transforming epics and features into robust solutions Collaborate closely with agile team members during sprints to iteratively deliver product requirements Work with the product team to understand, refine, and implement required functionality Engineer solutions that leverage cloud technologies as part of a multiyear migration and modernization roadmap Develop and optimize data-driven applications, ensuring the client can unlock value from its wealth of data Utilize Java and related technologies to build scalable, high-performance backend services Requirements Bachelor’s degree in Computer Science or a relevant certification Strong back-end development experience in Java Proven experience with DevOps CI/CD pipelines and tools such as Azure DevOps, GitHub, or GitLab Solid understanding and hands-on experience with Test-Driven Development (TDD) Well-versed in cloud architecture, with delivery experience on Azure (preferred), AWS, or GCP Strong grasp of software design principles Experience working with modern technologies such as data streaming, real-time and batch processing; familiarity with Databricks and Kubernetes is a plus We offer/Benefits We gather like-minded people: Engineering community of industry professionals Friendly team and enjoyable working environment Flexible schedule and opportunity to work remotely within Poland Chance to work abroad for up to 60 days annually Business-driven relocation opportunities We provide growth opportunities: Outstanding career roadmap Leadership development, career advising, soft skills, and well-being programs Certification (GCP, Azure, AWS) Unlimited access to LinkedIn Learning, Get Abstract, Cloud Guru English classes We cover it all: Stable income (Employment Contract or B2B) Participation in the Employee Stock Purchase Plan Benefits package (health insurance, multisport, shopping vouchers) Strategically located offices featuring entertainment and relaxation zones, table tennis and football, free snacks, fantastic coffee, and more Referral bonuses Corporate, social and well-being events Please, note: The set of bonuses might vary based on the role you apply for – specifics will be discussed with our recruiter during the general interview. We will reach out to selected candidates exclusively. EPAM is a leading global provider of digital platform engineering and development services. We are committed to having a positive impact on our customers, our employees, and our communities. We embrace a dynamic and inclusive culture. Here you will collaborate with multi-national teams, contribute to a myriad of innovative projects that deliver the most creative and cutting-edge solutions, and have an opportunity to continuously learn and grow. No matter where you are located, you will join a dedicated, creative, and diverse community that will help you discover your fullest potential.

🏢 Summary: Senior Full-Stack Engineer role with a 50/50 backend and frontend focus, building scalable microservices-based applications using ASP.NET (C#) and React with TypeScript in a cloud-native environment. The position involves designing and maintaining REST APIs, developing responsive user interfaces, ensuring high test coverage, and contributing to architectural decisions with strong technical ownership. Poland-based employment (Umowa o Pracę) with remote flexibility and quarterly in-person collaboration. 🗂️ Requirements: MSc+ in Computer Science or equivalent, Minimum 5 years experience with ASP.NET and C#, Minimum 5 years experience building REST APIs, Minimum 5 years experience with React, Experience with TypeScript, Strong knowledge of microservices architecture, Knowledge of cloud design patterns, Experience with unit, integration, and end-to-end testing, High level of technical ownership, Fluent English (minimum B2), Poland residency 📃 Skills: ASP.NET, C#, REST, React, TypeScript, Microservices, AWS, Agile, DDD, UnitTesting, IntegrationTesting, E2ETesting, Cloud 🏢 Description: We’re looking for a Senior Full-Stack Engineer who brings deep technical expertise and a collaborative mindset to our product development team. You will work with a modern microservices architecture, building scalable backend services using the ASP.NET Web API with C#, and intuitive frontend interfaces using mainly React and TypeScript. This is a hands-on engineering role with a 50/50 front-/backend focus, ideal for someone who likes to take ownership, thrives in a dynamic product team, and enjoys mentoring others. This role could easily become a Tech Lead role in a foreseeable future. If you're passionate about designing high-impact software in a cloud-native environment, we’d love to hear from you. This Poland-based role offers remote flexibility, but we value in-person collaboration. Our team meets in Poland for at least one week each quarter, so we request all applicants to be located in Poland. This is not a globally remote role. Poland residency is required. The contract form is Umowa o Pracę (only, no B2B). What you will be responsible for Collaborate proactively in refinement sessions with product and tech teams to ensure clarity and feasibility of features. Design, implement, and maintain scalable web APIs using ASP.NET and microservices architecture principles. Develop responsive user interfaces with React and TypeScript that enhance usability and performance. Work closely with Product Owners to clarify feature requirements and ensure business context is well-understood. Define, design and align feature architecture with the Head of Engineering to ensure consistency and scalability. Ensure features meet Definition of Done, with state-of-the-art unit, integration, and end-to-end test coverage. Support incident response and production issue resolution as per team standards. Actively contribute to team knowledge sharing and coach colleagues in technical best practices. What makes you a match Essential Qualifications: MSc+ in Computer Science or equivalent 5 years of proven experience in building secure REST APIs using ASP.NET , as well as developing solid front-end applications with React are non-negotiable must haves. Comprehensive knowledge of contemporary web application architectures, with a focus on microservices and cloud design patterns. Demonstrated ability of high technical Ownership and Tech Leadership are a requirement for this role. Bonus Skills: Hands-on experience with AWS infrastructure. Experience working in cross-functional product teams using Agile practices and following Domain-Driven Design (DDD). Collaboration and Interpersonal Skills: Clear and adaptive communication with both technical and non-technical stakeholders. Strong sense of ownership, accountability, and proactive problem-solving. Languages: English: B2 - (No certificate required, but Fluency) German, Polish, Ukrainian: desired, not required What you can expect A dynamic, ambitious team where your voice is heard, and your contributions truly matter. You’ll have real ownership over your decisions in a trusted, cross-functional environment within a Swiss product company that puts people first. We offer fair compensation, flexible working hours, a hybrid work setup, and a culture that supports both personal and professional growth, fostering a healthy work-life balance. Employer of Record: For this role, we offer employment through our trusted Employer of Record provider Remote.com , ensuring full legal compliance and a seamless experience for our team members in Poland. ID Verification: To maintain a fair and secure hiring process, candidates may be asked to verify their identity their identity before speaking with our Recruiter. This step helps us prevent fraud and focus our resources on genuine applicants. About us Who we are esurance is a Swiss InsurTech offering a SaaS platform that connects SMEs, insurance providers, brokers, and business application providers. Founded in 2013, we're on a mission to make health insurance for small businesses truly hassle-free. What makes us unique You'll be part of a connected, forward-thinking team built on trust, openness, and mutual respect — working hybrid from Zürich or remotely across Europe. We invest in your growth through agile practices, real ownership, and a transparent Grading System that ensures fair pay and clear career paths. Our core values We are connected. We are ahead. We are clear. We are approachable. Do these resonate with you? → Come join us. Our Recruitment Process & Principles We keep our process transparent and respect your time: Application Review — You hear from us within 5 business days. Always. Recruiter Screen — A relaxed Get2Know call to explore mutual fit. Four Interviews — Two Role Knowledge interviews (peer + supervisor), one Culture Match, one Leadership conversation. Batched into two days wherever possible. Hiring Decision — Thoughtful, timely. You'll know within 1–2 weeks. Use of Artificial Intelligence (AI) We use AI to increase productivity and you're welcome to use it to polish your CV or Coverletter. Interviews and assessments should reflect your genuine self, though. Recruiting Agencies: We don't work with unsolicited agency submissions. Thanks for respecting this.

🏢 Summary: Software Engineer role on the Client team building secure browser extensions, desktop applications, CLI tools and SDKs for a global cybersecurity product. The position focuses on client-side engineering in a zero-trust, end-to-end encrypted environment with strong ownership across the full development lifecycle. Ideal for engineers who enjoy solving complex product and security challenges while contributing to open-source and high-quality software at scale. 🗂️ Requirements: 3+ years of experience building JavaScript applications in production, Strong client-side engineering experience with React or similar framework, Ability to design simple, robust solutions to complex problems, Experience writing and maintaining unit, integration and end-to-end tests, Ability to implement secure client-side business logic and data handling, Comfort collaborating across product, design and engineering, Interest in security, privacy or trustworthy software systems 📃 Skills: JavaScript, React, HTML, CSS, Storybook, Jest, WebdriverIO, OpenPGP, Git, Docker, Windows, macOS, Linux 🏢 Description: THE CLIENT Our client is a fast-growing cybersecurity product company rethinking how teams manage and share sensitive access. Their platform is trusted by 40,000+ organisations across 50+ countries - and growing fast. This is an engineering-led business: modern architecture, real technical challenges, and a strong focus on open source, privacy, and security. They’re building a fully remote, collaborative team and looking for engineers who take ownership and enjoy solving meaningful problems. If you want to work on a product with real impact at global scale - this is worth a conversation. THE ROLE: Our client is looking for a software engineer to join its Client team and help build the applications through which users experience the product, including browser extensions, desktop applications, command-line tools and SDKs. This is not a typical frontend role. Because their product is built around end-to-end encryption and a zero-trust model, their client applications carry significant responsibility for security, data handling and product behaviour. The role sits at the intersection of client engineering, product thinking, usability and security-sensitive application design. You would work on features used by a large open-source community, contributing across the full lifecycle: understanding the problem, shaping the approach, implementing the solution, testing it thoroughly and improving it over time. This role will suit someone who enjoys solving complex product problems, keeping solutions simple, and working in an environment where quality, openness and collaboration matter. RESPONSIBILITIES: Build and improve client applications across browser, desktop and adjacent client surfaces Translate product and user needs into secure, usable client-side solutions Implement and maintain business logic, local data handling and security-sensitive workflows on the client side Contribute to testing strategy across unit, integration and end-to-end levels Work closely with product, design and engineering peers to refine solutions before implementation Help improve code quality, performance, maintainability and documentation Contribute to open-source collaboration with the community where relevant CORE REQUIREMENTS 3+ years of experience building JavaScript applications in production Strong client-side engineering fundamentals with React or a similar framework Ability to break down complex problems and design simple, robust solutions Good testing habits and attention to quality Comfort working across product, engineering and implementation questions - not just coding tickets Strong collaboration skills, openness to feedback, and a low-ego working style Interest in security, privacy, or building trustworthy software systems NICE TO HAVE Experience building browser extensions, desktop applications or other multi-platform clients Experience with security-sensitive applications, client-side cryptography or zero-trust architectures Experience with design systems, Storybook or usability-focused product development Open-source contribution experience Experience maintaining long-lived software products Familiarity with other languages such as Go, Swift, C#, PHP, Python or Rust Tools and technologies you’ll work with: JavaScript, React, HTML/CSS, Storybook, Jest, WebdriverIO, OpenPGP-related tooling, Git and Docker across Windows, macOS and Linux environments. (We do not expect candidates to bring experience with every tool listed here) How you work You take ownership of problems, not just tasks You value simplicity and avoid over-engineering You work well in an environment where feedback is frequent and constructive

🏢 Summary: Software Engineer role focused on building and improving secure client applications including browser extensions, desktop apps, CLI tools and SDKs within a zero-trust, end-to-end encrypted product. The position combines client-side engineering, security-sensitive design and product thinking, contributing across the full development lifecycle. You will deliver secure, high-quality solutions used by a large global and open-source community. 🗂️ Requirements: 3+ years of production experience with JavaScript, Strong experience with React or similar framework, Solid client-side engineering fundamentals, Experience designing simple, robust solutions for complex problems, Hands-on experience with unit, integration and end-to-end testing, Ability to implement secure client-side data handling and business logic, Experience collaborating across product, design and engineering teams, Interest in security, privacy or secure software systems 📃 Skills: JavaScript, React, HTML, CSS, Storybook, Jest, WebdriverIO, OpenPGP, Git, Docker, Windows, macOS, Linux 🏢 Description: THE CLIENT Our client is a fast-growing cybersecurity product company rethinking how teams manage and share sensitive access. Their platform is trusted by 40,000+ organisations across 50+ countries - and growing fast. This is an engineering-led business: modern architecture, real technical challenges, and a strong focus on open source, privacy, and security. They’re building a fully remote, collaborative team and looking for engineers who take ownership and enjoy solving meaningful problems. If you want to work on a product with real impact at global scale - this is worth a conversation. THE ROLE: Our client is looking for a software engineer to join its Client team and help build the applications through which users experience the product, including browser extensions, desktop applications, command-line tools and SDKs. This is not a typical frontend role. Because their product is built around end-to-end encryption and a zero-trust model, their client applications carry significant responsibility for security, data handling and product behaviour. The role sits at the intersection of client engineering, product thinking, usability and security-sensitive application design. You would work on features used by a large open-source community, contributing across the full lifecycle: understanding the problem, shaping the approach, implementing the solution, testing it thoroughly and improving it over time. This role will suit someone who enjoys solving complex product problems, keeping solutions simple, and working in an environment where quality, openness and collaboration matter. RESPONSIBILITIES: Build and improve client applications across browser, desktop and adjacent client surfaces Translate product and user needs into secure, usable client-side solutions Implement and maintain business logic, local data handling and security-sensitive workflows on the client side Contribute to testing strategy across unit, integration and end-to-end levels Work closely with product, design and engineering peers to refine solutions before implementation Help improve code quality, performance, maintainability and documentation Contribute to open-source collaboration with the community where relevant CORE REQUIREMENTS 3+ years of experience building JavaScript applications in production Strong client-side engineering fundamentals with React or a similar framework Ability to break down complex problems and design simple, robust solutions Good testing habits and attention to quality Comfort working across product, engineering and implementation questions - not just coding tickets Strong collaboration skills, openness to feedback, and a low-ego working style Interest in security, privacy, or building trustworthy software systems NICE TO HAVE Experience building browser extensions, desktop applications or other multi-platform clients Experience with security-sensitive applications, client-side cryptography or zero-trust architectures Experience with design systems, Storybook or usability-focused product development Open-source contribution experience Experience maintaining long-lived software products Familiarity with other languages such as Go, Swift, C#, PHP, Python or Rust Tools and technologies you’ll work with: JavaScript, React, HTML/CSS, Storybook, Jest, WebdriverIO, OpenPGP-related tooling, Git and Docker across Windows, macOS and Linux environments. (We do not expect candidates to bring experience with every tool listed here) How you work You take ownership of problems, not just tasks You value simplicity and avoid over-engineering You work well in an environment where feedback is frequent and constructive

🏢 Summary: Backend Developer role focused on designing, building, and maintaining scalable Java and Kotlin-based applications and microservices within an international team. The position involves developing high-quality backend systems, collaborating with cross-functional teams, and optimizing distributed systems performance. The role emphasizes clean code, modern frameworks, and agile delivery practices. 🗂️ Requirements: 5+ years of backend development experience with Java 8+ and Kotlin, Strong knowledge of Spring Framework and Spring Boot, Experience building RESTful APIs and microservices, Experience with SQL and NoSQL databases, Understanding of Agile/Scrum methodologies 📃 Skills: Java, Kotlin, Spring, SpringBoot, REST, Microservices, SQL, NoSQL, PostgreSQL, MongoDB, Agile, Scrum 🏢 Description: We are looking for skilled Java & Kotlin Developers to join our growing technology team in Poland. As part of an international development group, you’ll design, build, and maintain scalable backend systems using Java and modern frameworks. You’ll collaborate closely with cross-functional teams to deliver high-quality, reliable, and efficient software solutions. Key Responsibilities Design, develop, and maintain Java-based applications and microservices. Write clean, efficient, and testable code following best practices and coding standards. Collaborate with front-end developers , DevOps engineers , and QA teams to ensure seamless integration and delivery. Participate in code reviews , architecture discussions, and agile ceremonies. Contribute to technical documentation and continuous improvement of development processes. Troubleshoot and optimize performance across distributed systems. Requirements 5+ years of experience in backend development using Java 8+ Kotlin . Strong understanding of Spring Framework / Spring Boot . Experience with RESTful APIs , microservices , and SQL / NoSQL databases (e.g., PostgreSQL, MongoDB). Knowledge of Agile / Scrum methodologies. Good command of English (B2 or higher) – Polish language skills are a plus. Nice to Have Experience with cloud platforms (AWS, Azure, or GCP). Familiarity with message brokers (Kafka, RabbitMQ). Knowledge of unit testing and test automation frameworks (JUnit, Mockito). Interest in DevOps or system design concepts. How to Apply If you’re passionate about building high-quality Java applications and want to be part of a dynamic engineering team, send your CV

🏢 Summary: The role is for a Middle/Senior Full Stack Engineer to build and scale a SaaS platform using Java and React, contributing to architecture, secure cloud-based integrations, and CI/CD processes. The position involves end-to-end development, code reviews, and collaboration with cross-functional teams in a product built from the ground up. It offers significant ownership and impact within a high-scale environment. 🗂️ Requirements: 4+ years of SaaS development experience, Proficiency in Java, Proficiency in React, Strong knowledge of SQL, Experience with microservices architecture, Experience with JavaScript and TypeScript, Understanding of CI/CD practices, Understanding of observability concepts, Ability to work with EST time zone overlap, Upper-intermediate English proficiency 📃 Skills: Java, React, SQL, JavaScript, TypeScript, ReactJS, Microservices, CI/CD, Redis, Elasticsearch, AWS 🏢 Description: ID67841 AgileEngine is an Inc. 5000 company that creates award-winning software for Fortune 500 brands and trailblazing startups across 17+ industries. We rank among the leaders in areas like application development and AI/ML, and our people-first culture has earned us multiple Best Place to Work awards. Why join us If you're looking for a place to grow, make an impact, and work with people who care, we'd love to meet you! :) About the role We are looking for a Middle/Senior Full Stack Engineer to build robust server-side solutions for a SaaS platform operating at scale, working across Java, React, SQL, Redis, and Elasticsearch. You will contribute to architecture decisions, design reusable client integration systems following secure cloud best practices, and participate in code reviews and CI/CD processes as a trusted technical resource for the team. The role offers significant ownership from day one in a product built from the ground up. What you will do Build a cleanly designed, reusable client integration system adhering to secure cloud software best practices from start to finish; Collaborate with design and product teams to understand requirements, create estimates, plan sprints, and meet delivery timelines; Plan and accurately estimate construction and delivery timelines; Contribute to technical documentation and automated build and deployment processes designed to increase engineer efficiency; Review code submitted by other software engineers and submit your own code for review as part of the pull-request deployment process. Must haves 4+ years’ experience of SaaS experience; High level of proficiency in Java , React , and SQL ; Knowledge of or prior experience with microservices architecture ; Front end experience with JavaScript , Typescript , and ReactJS ; DevOps mindset of automation and continuous improvement; Good understanding of observability and familiarity with strong CI/CD practices; A proven ability to meet deadlines, motivate others, and consistently produce high quality, impactful results; Ability to maintain at least 6 hours of overlap with EST working hours ; Upper-intermediate and higher English proficiency. Nice to haves Experience building software in the cloud with AWS preferred. The benefits of joining us Professional growth Accelerate your professional journey with mentorship, TechTalks, and personalized growth roadmaps Competitive compensation We match your ever-growing skills, talent, and contributions with competitive USD-based compensation and budgets for education, fitness, and team activities A selection of exciting projects Join projects with modern solutions development and top-tier clients that include Fortune 500 enterprises and leading product brands Flextime Tailor your schedule for an optimal work-life balance, by having the options of working from home and going to the office – whatever makes you the happiest and most productive. Meet Our Recruitment Process Asynchronous stage – An automated, self-paced track that helps us move faster and give you quicker feedback: Short online form to confirm basic requirements 30–60 minute skills assessment via Codility – a platform founded in Poland that helps us provide quicker feedback and streamline this stage of the process. 5-minute introduction video Synchronous stage – Live interviews Technical interview with our engineering team (scheduled at your convenience) Final interview with your future teammates If it’s a match — you’ll get an offer!

🏢 Summary: Hands-on Tech Lead role focused on designing and delivering scalable backend platforms and RESTful microservices for a global e-commerce and wellness technology ecosystem. The position involves technical leadership, backend development with Kotlin/Java and Spring Boot, mentoring engineers, and driving architecture decisions in a cloud-native environment. The role offers a hybrid work model in Warsaw with a competitive salary and benefits. 🗂️ Requirements: 6+ years of software development experience, Backend development experience with Java or Kotlin, Experience building and scaling RESTful microservices, Hands-on experience with Spring Boot, Hands-on experience with Docker, Hands-on experience with Kubernetes, Experience with AWS or GCP, Experience with PostgreSQL, MongoDB, DynamoDB, or Elasticsearch, Experience with unit testing and test-driven development, Experience with CI/CD pipelines, Experience leading technical projects and mentoring engineers, Ability to guide architecture decisions and delivery planning, Experience working in agile cross-functional teams 📃 Skills: Kotlin, Java, Spring, SpringBoot, Microservices, Docker, Kubernetes, AWS, GCP, PostgreSQL, MongoDB, DynamoDB, Elasticsearch, CI/CD, Datadog, REST, TDD, DevOps, Agile 🏢 Description: We are hiring on behalf of our client, a global innovator in fitness and wellness technology. Their mission is to empower people to live fit, strong, long, and happy lives by delivering integrated experiences to millions of members anytime, anywhere. We are looking for a Kotlin/Java Tech Lead to join an e-commerce engineering team. In this role, you will lead the design and delivery of scalable backend platforms and services powering the company's customer-facing commerce experience across web, retail, and other sales channels. This is a hands-on technical leadership role. You will guide engineering decisions, mentor other engineers, partner closely with product and design, and help the team deliver high-impact initiatives with strong engineering quality, scalability, and reliability. Key takeaways: Stack: Kotlin/Java, Spring Boot, microservices, Docker, Kubernetes, AWS, PostgreSQL, CI/CD, Datadog, technical leadership experience Salary: 26 000 PLN - 30 000 PLN gross on the Contract of Employment Working model : Hybrid - 3 days/week from the office Location: ul. Grzybowska, Warsaw Recruitment process : A call with MOTIFE Recruiter Panel interviews with the team (coding, architecture, and cross-collaboration interviews) Responsibilities: Technical Leadership Lead the delivery of small to large engineering initiatives, from technical discovery through implementation and production readiness. Guide the team in making strategic backend architecture decisions that support scalability, performance, and long-term maintainability. Own technical trade-offs and ensure solutions are aligned with business goals, user needs, and engineering standards. Mentor engineers through design reviews, code reviews, and day-to-day technical collaboration. Backend Engineering Build and improve backend platforms and services. Design and scale RESTful microservices used across web, retail, and other sales channels. Develop backend services using technologies such as Java, Kotlin, Spring Boot, Docker, and Kubernetes. Work with data stores such as PostgreSQL, MongoDB, DynamoDB, Elasticsearch, or similar technologies. Delivery & Product Collaboration Partner closely with product managers, designers, and peer engineers to scope, build, and deliver end-to-end features. Translate product strategy and business requirements into reliable, scalable technical solutions. Drive iterative delivery in an agile engineering environment. Maintain strong relationships with stakeholders and ensure clear communication around scope, risks, and delivery progress. Engineering Excellence Promote strong engineering practices, including unit testing, test-driven development, CI/CD, observability, and production ownership. Apply a DevOps mindset to build services that are reliable, observable, and easy to operate. Requirements: Technical Expertise 6+ years of professional software development experience. Strong backend engineering experience with Java or Kotlin. Proven experience building and scaling RESTful microservices. Hands-on experience with Spring Boot, Docker, and Kubernetes. Experience with cloud infrastructure such as AWS or GCP. Familiarity with data stores such as PostgreSQL, MongoDB, DynamoDB, Elasticsearch, or similar technologies. Experience with unit testing, test-driven development, and CI/CD pipelines. Leadership Experience Experience leading engineers to deliver high-impact technical projects. Proven ability to mentor junior and mid-level engineers and support their technical growth. Ability to guide technical decision-making, architecture discussions, and delivery planning. Experience with end-to-end feature ownership in a cross-functional product environment. Collaboration & Mindset Strong communication skills and ability to work effectively with product, design, and engineering stakeholders. Agile mindset with a strong focus on iterative design and delivery. High ownership, strong delivery orientation, and ability to operate in a fast-moving engineering environment. Strong desire to learn, share knowledge, and help engineers achieve their highest potential. What we offer: 100% paid medical care Multisport Creative tax (KUP) Home office allowance MacBook Pro Apply now If you enjoy technical leadership, hands-on backend engineering, and building platforms used at scale, this role is a strong opportunity to make a real impact. Please apply via our careers page and submit your CV in English.