Staff Engineer

🏢 Summary: Senior Staff Software Engineer role focused on technical leadership and architecture for a large-scale SaaS marketing automation platform undergoing an AI-first transformation. The position involves driving AI-powered solutions, shaping cloud-native architecture on AWS, and solving complex scalability and performance challenges across distributed systems. The role operates across multiple teams, influencing technical strategy and mentoring senior engineers. 🗂️ Requirements: 8+ years of software engineering experience, Experience designing and delivering large-scale SaaS applications, Experience with complex distributed systems, Strong backend expertise in Python and/or PHP, Strong system design and architecture experience, Hands-on experience with AI-powered products or LLM integrations, Experience with AWS cloud environments, Experience with CI/CD pipelines and observability tools, Knowledge of MySQL, Redis, or DynamoDB, Ability to drive architectural decisions across teams 📃 Skills: Python, PHP, AWS, React, Ember, MySQL, Redis, DynamoDB, CI/CD, LLM, AI, Observability 🏢 Description: Our client helps small teams power big businesses with the must-have platform for intelligent marketing automation. Customers from over 170 countries depend on the Client’s mix of pre-built automation and integration to power personalized marketing, transactional emails, and one-to-one CRM interactions throughout the customer lifecycle. We’re looking for a Staff Software Engineer to join our client's growing engineering organization and help shape the future of a large-scale SaaS platform undergoing a major AI-first transformation. This is a highly impactful role focused on technical leadership, architecture, and cross-team collaboration. As a Staff Engineer, you’ll work across multiple engineering teams, helping solve complex technical challenges, drive architectural decisions, and accelerate the adoption of AI-powered solutions and agentic workflows across the platform. Rather than being tied to a single product area, you’ll operate at a broader organizational level, partnering closely with Engineering, Product, Design, and AI teams to improve scalability, performance, and engineering excellence. You’ll also play a key role in mentoring senior and lead engineers, helping raise the technical bar across the organization. This role is ideal for someone who enjoys tackling complex system-level challenges, influencing technical strategy, and driving impact through architecture, mentorship, and technical leadership rather than people management. Key takeaways: Stack: Python/PHP, AWS, React/Ember, MySQL, Redis, DynamoDB, CI/CD pipelines, observability tooling, and AI/LLM-powered services. Salary : 31 000 - 37 000 PLN gross/month, Contract of employment (+10% annual bonus, 75% Creative Tax) Working model: Hybrid, once a week in the office Location: Krakow, ul. Konopnickiej Recruitment process: Call with MOTIFE recruiter (30 min) Technical architecture session (1,5h) Panel (including cross-functional, AI-focused, High Grader | 1,5h) Responsibilities: Provide technical leadership and architectural guidance across multiple engineering teams within the Kraków Hub. Drive the design and development of AI-powered solutions, including agentic workflows, LLM integrations, and intelligent platform capabilities. Solve complex platform, scalability, and performance challenges across backend systems built with Python and PHP, while maintaining awareness of frontend technologies such as React and Ember. Partner closely with Engineering, Product, Design, and AI teams to deliver high-impact solutions. Contribute to the evolution of cloud-native architecture, engineering standards, and best practices across AWS-based environments. Mentor senior and lead engineers, fostering engineering excellence and best practices. Act as a trusted technical advisor, helping teams make sound architectural decisions while balancing business goals with long-term platform health. Requirements: 8+ years of software engineering experience , including designing and delivering large-scale SaaS applications and complex distributed systems. Strong backend expertise with Python and/or PHP in production systems. Solid system design and architecture background, with the ability to drive technical decisions, solve complex platform-wide challenges, and balance short-term delivery with long-term scalability. Hands-on experience with AI-powered products, LLM integrations, agentic workflows, or machine learning solutions. Proven ability to influence technical direction across teams and drive architectural decisions. Experience with AWS, CI/CD, observability, and modern engineering practices. Knowledge of databases such as MySQL, Redis, DynamoDB, or similar technologies. Experience with React or Ember is considered a plus. Background in marketing automation, CRM, or e-commerce platforms. Familiarity with modern AI engineering practices, AI development tooling, and emerging standards such as MCP is a plus. What we offer: Health Benefits 1. Medical Full coverage for employees and their dependents through LUX MED. Employees have access to the “Premium” package, providing enhanced coverage and greater access to care. A client pays 100% of the premium for employees and 50% for dependents. 2. Dental No additional cost for dental coverage- integrated into LUX MED medical plan. 3. Vision Reimbursement for vision expenses up to 400 PLN every 2 years. Mental Health Tools Access to TELUS Health EAP to provide support and resources in a time of need. Additional Benefits 10% annual bonus 75% Creative Tax Vacation: 26 days. Home Office Stipend: One-time $150 equivalent home office stipend to outfit their home office. Calm Subscription: Premium subscription access to Calm, the #1 app for sleep, meditation, and relaxation. Hub Perks: Receive meal and transportation benefits when traveling to the Poland Hub. Baby Swag: If you have a baby or adopt, you’ll receive a company-branded first bath bundle. Sabbatical Program: After 5 years of employment, receive a month-long paid sabbatical leave, with a sabbatical leave bonus.

🏢 Summary: Staff Software Engineer role focused on technical leadership and architecture for a large-scale SaaS marketing automation platform undergoing an AI-first transformation. The position drives cross-team architectural decisions, scalability improvements, and adoption of AI-powered and LLM-based solutions. It emphasizes system-level impact, mentorship of senior engineers, and cloud-native platform evolution. 🗂️ Requirements: 8+ years software engineering experience, Experience designing large-scale SaaS applications, Experience with distributed systems, Strong backend expertise in Python or PHP, Solid system design and architecture experience, Hands-on experience with AI-powered products or LLM integrations, Experience with AWS environments, Experience with CI/CD pipelines, Experience with observability tools, Knowledge of MySQL, Redis, or DynamoDB, Ability to drive architectural decisions across teams 📃 Skills: Python, PHP, AWS, React, Ember, MySQL, Redis, DynamoDB, CI/CD, LLM, AI, Observability 🏢 Description: Our client helps small teams power big businesses with the must-have platform for intelligent marketing automation. Customers from over 170 countries depend on the Client’s mix of pre-built automation and integration to power personalized marketing, transactional emails, and one-to-one CRM interactions throughout the customer lifecycle. We’re looking for a Staff Software Engineer to join our client's growing engineering organization and help shape the future of a large-scale SaaS platform undergoing a major AI-first transformation. This is a highly impactful role focused on technical leadership, architecture, and cross-team collaboration. As a Staff Engineer, you’ll work across multiple engineering teams, helping solve complex technical challenges, drive architectural decisions, and accelerate the adoption of AI-powered solutions and agentic workflows across the platform. Rather than being tied to a single product area, you’ll operate at a broader organizational level, partnering closely with Engineering, Product, Design, and AI teams to improve scalability, performance, and engineering excellence. You’ll also play a key role in mentoring senior and lead engineers, helping raise the technical bar across the organization. This role is ideal for someone who enjoys tackling complex system-level challenges, influencing technical strategy, and driving impact through architecture, mentorship, and technical leadership rather than people management. Key takeaways: Stack: Python/PHP, AWS, React/Ember, MySQL, Redis, DynamoDB, CI/CD pipelines, observability tooling, and AI/LLM-powered services. Salary : 31 000 - 37 000 PLN gross/month, Contract of employment (+10% annual bonus, 75% Creative Tax) Working model: Hybrid, once a week in the office Location: Krakow, ul. Konopnickiej Recruitment process: Call with MOTIFE recruiter (30 min) Technical architecture session (1,5h) Panel (including cross-functional, AI-focused, High Grader | 1,5h) Responsibilities: Provide technical leadership and architectural guidance across multiple engineering teams within the Kraków Hub. Drive the design and development of AI-powered solutions, including agentic workflows, LLM integrations, and intelligent platform capabilities. Solve complex platform, scalability, and performance challenges across backend systems built with Python and PHP, while maintaining awareness of frontend technologies such as React and Ember. Partner closely with Engineering, Product, Design, and AI teams to deliver high-impact solutions. Contribute to the evolution of cloud-native architecture, engineering standards, and best practices across AWS-based environments. Mentor senior and lead engineers, fostering engineering excellence and best practices. Act as a trusted technical advisor, helping teams make sound architectural decisions while balancing business goals with long-term platform health. Requirements: 8+ years of software engineering experience , including designing and delivering large-scale SaaS applications and complex distributed systems. Strong backend expertise with Python and/or PHP in production systems. Solid system design and architecture background, with the ability to drive technical decisions, solve complex platform-wide challenges, and balance short-term delivery with long-term scalability. Hands-on experience with AI-powered products, LLM integrations, agentic workflows, or machine learning solutions. Proven ability to influence technical direction across teams and drive architectural decisions. Experience with AWS, CI/CD, observability, and modern engineering practices. Knowledge of databases such as MySQL, Redis, DynamoDB, or similar technologies. Experience with React or Ember is considered a plus. Background in marketing automation, CRM, or e-commerce platforms. Familiarity with modern AI engineering practices, AI development tooling, and emerging standards such as MCP is a plus. What we offer: Health Benefits 1. Medical Full coverage for employees and their dependents through LUX MED. Employees have access to the “Premium” package, providing enhanced coverage and greater access to care. A client pays 100% of the premium for employees and 50% for dependents. 2. Dental No additional cost for dental coverage- integrated into LUX MED medical plan. 3. Vision Reimbursement for vision expenses up to 400 PLN every 2 years. Mental Health Tools Access to TELUS Health EAP to provide support and resources in a time of need. Additional Benefits 10% annual bonus 75% Creative Tax Vacation: 26 days. Home Office Stipend: One-time $150 equivalent home office stipend to outfit their home office. Calm Subscription: Premium subscription access to Calm, the #1 app for sleep, meditation, and relaxation. Hub Perks: Receive meal and transportation benefits when traveling to the Poland Hub. Baby Swag: If you have a baby or adopt, you’ll receive a company-branded first bath bundle. Sabbatical Program: After 5 years of employment, receive a month-long paid sabbatical leave, with a sabbatical leave bonus.

🏢 Summary: Staff Software Engineer (Backend) role focused on building advanced detection capabilities and scalable backend services across hybrid on‑prem and SaaS environments. The position involves architectural design, platform integrations, and leveraging AI/ML to enhance detection accuracy while mentoring engineers. It combines deep technical ownership with cross‑functional collaboration to drive product and platform improvements. 🗂️ Requirements: Degree in Computer Science or equivalent practical experience, 6+ years of experience building enterprise‑grade software with .NET, Experience designing and delivering scalable on‑prem and cloud‑based systems, Understanding of DevOps, CI/CD, and observability tooling, Strong knowledge of distributed systems and modular architectures, Experience with Docker, Kubernetes, and Infrastructure as Code, Ability to design REST APIs and asynchronous communication patterns, Proficiency in modern object‑oriented backend languages, Experience with high‑performance databases, Experience with Azure 📃 Skills: .NET, Azure, Docker, Kubernetes, IaC, CI/CD, DevOps, REST, PostgreSQL, EF, SQL, AI, ML, OOP 🏢 Description: We are looking for a Staff Software Engineer (backend oriented) , who will work on advanced detection capabilities, scalable backend services, and architectural improvements across hybrid environments. This role combines deep technical ownership with the opportunity to influence product direction and mentor other engineers. Responsibilities: Build and enhance detection features across services in hybrid environments Design scalable backend components for both on‑prem and SaaS deployments Contribute to platform‑wide integrations across multiple products Use AI/ML tools to improve detection accuracy, anomaly identification, and engineering productivity Collaborate with product, platform, and engineering leaders to align technical decisions with business goals Mentor engineers and support a culture focused on innovation, security, and technical excellence. Requirements: Degree in Computer Science or equivalent practical experience 6 - 10+ years of experience building enterprise‑grade software, including experience with .NET Background in designing and delivering scalable on‑prem and cloud‑based systems (ideally experience with Azure ) Understanding of DevOps, CI/CD, and observability tooling Strong understanding of distributed systems and modular architectures Experience with Docker, Kubernetes, and IaC Ability to design robust REST APIs and asynchronous communication patterns Proficiency in modern object‑oriented backend languages Experience with high‑performance databases (e.g., PostgreSQL, EF Core) Nice to have a solid knowledge of identity‑related technologies. Benefits: Attractive salary and benefits package, including Multisport card, insurance, and medical care Hybrid work from the Krakow office International work environment in a product company Training and development opportunities within the organization.

🏢 Summary: Software Engineer role in a long-term international project, working in a cross-functional team responsible for full product lifecycle from design to production support. The position involves backend and frontend development using modern technologies in an iterative delivery model. Hybrid work model with 5 days per month in the office. 🗂️ Requirements: Minimum 5 years of commercial software development experience, Experience with at least one programming language: Kotlin, Python, or JavaScript, Willingness to work across backend and frontend technologies, Working knowledge of Unix/Linux environments, Understanding of databases: MongoDB, Redis, PostgreSQL, Experience with HTTP APIs and RESTful services, Ability to provide production support and troubleshoot performance and security issues, Good English communication skills 📃 Skills: Kotlin, Python, JavaScript, Unix, Linux, MongoDB, Redis, PostgreSQL, REST, HTTP, .NET, C# 🏢 Description: Software Engineer (Kotlin / Python / JavaScript) Location: Kraków or Warsaw (hybrid — 5 days per month in the office) Contract type: B2B — 130–140 PLN/h Project: Long-term international project About the Role We are looking for a Software Engineer to join a collaborative product team working in an iterative delivery model. The team is responsible for the full lifecycle of the product — from design and development to production support — following the principle: “you build it, you support it.” This role offers an opportunity to work with modern technologies across backend and frontend, while continuously learning new programming languages and tools. Key Responsibilities Work in a cross-functional team of 4–6 engineers Break down requirements into user stories and deliver iteratively to production Design technical solutions aligned with architectural guidelines Provide production support, including troubleshooting bugs, performance, and security issues Identify and manage technical debt alongside new feature development Collaborate closely with team members, including pair programming Ensure high quality and maintainability of delivered solutions Requirements Minimum 5 years of relevant commercial experience Experience with at least one programming language (Kotlin, Python, or JavaScript preferred) Willingness to learn multiple technologies across backend and frontend Working knowledge of Unix/Linux environments Understanding of databases from a usage perspective (MongoDB, Redis, PostgreSQL) Experience with HTTP APIs (RESTful services) Good English communication skills (team communication in English) Nice to Have Knowledge of .NET / C# What We Offer Hybrid work model — only 5 days per month from the office (Kraków or Warsaw) Private medical care (Medicover) Sports card (Multisport or equivalent) Life insurance Long-term, stable cooperation Opportunity to work with modern technologies in an international environment Support for professional development and learning

🏢 Summary: Staff Software Engineer role focused on architecting and delivering mission-critical software for a nuclear energy platform in a highly regulated environment. The position combines hands-on development with technical leadership, system integration, and rigorous quality and compliance practices. The engineer will drive scalable, reliable solutions that support safety-critical operations and cross-functional collaboration. 🗂️ Requirements: Bachelor's degree in Computer Science, Software Engineering, Electrical Engineering, or related field, 7+ years of progressive software development experience, Experience in safety-critical or highly regulated industries, Proficiency in JavaScript, TypeScript, or Python, Experience with full SDLC (Agile and Waterfall), Strong knowledge of software design patterns, data structures, and algorithms, Experience with Git and collaborative workflows, Expertise in complex software architecture design, Strong understanding of software QA and testing methodologies, Ability to debug and troubleshoot complex systems 📃 Skills: JavaScript, TypeScript, Python, Git, Agile, Waterfall, SDLC, AI, ML 🏢 Description: About the role As a Staff Software Engineer, you will serve as a technical leader responsible for architecting and delivering software that powers critical aspects of our nuclear energy platform. You'll work at the intersection of software, engineering, and operations, solving complex problems in a highly regulated environment where reliability and safety are paramount. This role requires both strategic thinking and hands-on execution, with opportunities to influence technical direction, mentor engineers, and drive cross-functional initiatives. Your work will directly contribute to advancing clean, carbon-free energy solutions and shaping the future of the nuclear industry. Responsibilities Software Design & Development: Lead the design and development of robust, scalable, and high-quality software solutions for critical nuclear energy applications. This includes architecting new features, writing clean and efficient code, and participating in code reviews. Technical Leadership: Provide technical leadership and guidance to junior and mid-level engineers, mentoring them in best practices for software development, quality, and adherence to industry standards. System Integration: Work closely with hardware engineers, control systems engineers, and other software teams to ensure seamless integration of software components with physical systems and external interfaces. Quality & Compliance: Implement and advocate for rigorous software quality assurance practices, including comprehensive testing, debugging, and documentation, ensuring compliance with nuclear industry regulations and internal quality standards. Performance Optimization: Identify and resolve complex performance issues, ensuring our software operates efficiently and reliably under demanding conditions. Problem Solving: Tackle challenging technical problems, proposing innovative solutions and driving their implementation from concept to deployment. Documentation: Create and maintain thorough technical documentation, including design specifications, architecture diagrams, and testing protocols. Experience Bachelor's degree in Computer Science, Software Engineering, Electrical Engineering, or a closely related technical field. 7+ years of progressive experience in software development, with a strong portfolio of successfully delivered projects. Experience developing software for highly regulated, safety-critical, or mission-critical industries (e.g., nuclear, aerospace, defense, medical devices, automotive safety). Direct nuclear industry experience is highly preferred. Proficiency in one or more relevant programming languages such as JavaScript, TypeScript, or Python. Demonstrated experience with full software development life cycles (SDLCs), including Agile and Waterfall methodologies. Strong understanding of software design patterns, data structures, and algorithms. Experience with version control systems (e.g., Git) and collaborative development workflows. Expertise in designing and implementing complex software architectures. Deep understanding of software quality assurance principles and testing methodologies. Ability to debug and troubleshoot intricate software systems. Exceptional problem-solving and analytical skills. Strong written and verbal communication skills, with the ability to articulate technical concepts to diverse audiences. Ability to work effectively in a collaborative, fast-paced environment. Preferred Experience Experience building offline-capable, air-gapped, or otherwise disconnected applications, and packaging them for constrained or containerized deployment environments. Hands-on experience integrating third-party physical security systems. Experience applying AI features & ML models into production workflows. Exposure to nuclear, critical infrastructure, defense, or physical security domains. Benefits Competitive compensation packages 401k with company match Medical, dental, vision plans Generous vacation policy, plus holidays Estimated Starting Salary Range The estimated starting salary range for this role is $150,000 - $173,000 annually less applicable withholdings and deductions, paid on a bi-weekly basis. The actual salary offered may vary based on relevant factors as determined in the Company's discretion, which may include experience, qualifications, tenure, skill set, availability of qualified candidates, geographic location, certifications held, and other criteria deemed pertinent to the particular role. EEO Statement The company is an equal opportunity employer committed to fostering an environment of inclusion in the workplace. We provide equal employment opportunities to all qualified applicants and employees without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, veteran status, or any other protected characteristic. We prohibit discrimination in all aspects of employment, including hiring, promotion, demotion, transfer, compensation, and termination. Export Control Certain positions may involve access to information and technology subject to export controls under U.S. law. Compliance with these export controls may result in limiting consideration of certain applicants.

🏢 Summary: Full-time hybrid Software Engineer role focused on building responsive, AI-driven web applications for enterprise platforms using modern JavaScript technologies. The position involves developing high-quality React-based interfaces, applying TDD and CI practices, and collaborating within cross-functional Agile teams. Long-term B2B contract based in Warsaw with competitive salary. 🗂️ Requirements: 6+ years experience with JavaScript, 6+ years experience with TypeScript, Strong knowledge of design patterns in JavaScript, Proficiency in React with Redux, Experience with Next.js, Understanding of functional programming concepts, Strong knowledge of asynchronous programming, Experience with Git and branch management, Experience debugging front-end applications, Experience creating and integrating custom packages, Understanding of object-oriented programming principles, Practical experience with HTML5, Practical experience with CSS3, Experience in Agile environments, Ability to develop cross-browser compatible code 📃 Skills: JavaScript, TypeScript, React, Redux, Next.js, HTML5, CSS3, Git, TDD, CI, Agile 🏢 Description: 💰 Salary: 14,500-17,000 PLN/month 🌎 Hybrid from Warsaw, Poland 🕦 Full-time position, long-term ☑️ B2B We are looking for a Software Engineer to join our client, a technology company that builds AI-powered platforms and consulting solutions for enterprise operations, with a strong focus on the private capital sector. The company has over ten years of experience working with high-growth and PE-backed businesses, combining deep domain expertise with advanced technology to drive measurable results. Requirements: 6+ years of experience working with JavaScript and TypeScript Solid understanding of design patterns and how to apply them in JavaScript development. Proficiency in a modern front-end JavaScript framework such as React.js with Redux; experience with Next.js is an advantage. Familiarity with functional programming concepts. Strong grasp of asynchronous programming and its best practices. Knowledge of Git and experience with branch management. Experience troubleshooting front-end issues and using relevant debugging tools. Familiarity with creating and integrating custom packages. Good understanding of object-oriented programming principles and their use in JavaScript. Ability to perform effectively under pressure and meet strict deadlines. Practical experience with HTML5 and CSS3. Experience working within Agile development environments and practices. Strong communication and organizational abilities. Skilled in developing cross-browser compatible code. A Bachelor’s degree in Computer Science or a related field is preferred. Key Responsibilities: Creating and building responsive user interfaces using React. Applying and maintaining test-driven development (TDD) practices along with continuous integration processes. Working closely with a cross-functional team that includes project managers, analysts, and sales representatives to deliver high-quality, interactive products within deadlines. Promoting and implementing best practices in testing, accessibility, and performance optimization. Partnering with design, backend, QA, and product teams to develop reliable, user-focused solutions.

🏢 Summary: Software Engineer role focused on modernizing a mission-critical aviation platform by developing cloud-hosted backend services and scalable cloud-native solutions in AWS. The position involves backend modernization, Kubernetes and container management, CI/CD automation, and operational reliability improvements in a distributed engineering environment. The role offers hybrid work flexibility, B2B or UoP employment, and benefits including healthcare and life insurance. 🗂️ Requirements: Experience developing backend applications in cloud environments, Strong knowledge of AWS and cloud-native architectures, Hands-on experience with Linux, Hands-on experience with Docker, Hands-on experience with Apache, Hands-on experience with Java, Hands-on experience with Spring Boot, Experience with Kubernetes and containerized workloads, Experience with CI/CD, Experience with Infrastructure as Code, Experience with automation, Understanding of cloud security, Understanding of monitoring and production support practices, Strong troubleshooting and problem-solving skills, Ability to work independently and collaborate within distributed teams, English level B2 or higher 📃 Skills: AWS, Linux, Docker, Apache, Java, Spring, Kubernetes, CI/CD, IaC, Automation, SQL, MySQL, Security, Monitoring 🏢 Description: We are looking for a Software Engineer to join a team responsible for modernizing a mission-critical aviation platform used by tens of thousands of customers worldwide. You will help design, build, and evolve cloud-hosted backend services that support the distribution of aviation data across desktop, mobile, and aircraft-connected workflows. This is a unique opportunity to work on a high-impact product while contributing to a large-scale modernization initiative focused on cloud-native architecture, automation, scalability, security, and operational excellence. Working closely with cross-functional teams, you will help transform a well-established platform into a modern, resilient, and highly scalable ecosystem capable of supporting future growth and new product offerings. Key responsibilities Develop and modernize backend services hosted in AWS Design and implement scalable, resilient cloud-native solutions Build and improve APIs, integrations, and automated backend processes Enhance CI/CD pipelines, infrastructure automation, monitoring, and observability Manage and troubleshoot Kubernetes-based environments and containerized applications Support production systems and drive reliability, security, and operational improvements Collaborate with product, mobile, desktop, QA, and DevOps teams to deliver high-quality solutions Leverage AI-assisted development tools to improve engineering efficiency while maintaining high standards of quality and security Ideal candidate profile Experience developing backend applications in cloud environments Strong knowledge of AWS and cloud-native architectures Hands-on experience with Linux, Docker, Apache, Java and Spring Boot Experience with Kubernetes and containerized workloads Experience with CI/CD, Infrastructure as Code, and automation Understanding of cloud security, monitoring, and production support practices Strong troubleshooting and problem-solving skills Ability to work independently and collaborate within distributed teams English min. B2. Nice to Have: Experience modernizing legacy applications and services Experience with SQL Server and MySQL Experience building highly available and resilient production systems Experience using AI-assisted software development tools Conditions Employment type: B2B or UoP Location: Gdańsk Work model: 1 day a month in the office in Gdańsk or less frequently, depending on your availability Salary: 190 PLN net/h - to negotiate Benefits: life insurance, private healthcare, Multisport card

🏢 Summary: Senior/Staff Backend Engineer role focused on building and evolving a large-scale, event-driven platform using Java, Kafka Streams, and AWS. The position involves hands-on work with high-volume data flows, real-time stream processing, distributed systems, and production reliability. You will take strong technical ownership in a small team, shaping architecture, standards, and production readiness. 🗂️ Requirements: 7+ years of backend engineering experience, Strong hands-on experience with Java, Strong hands-on experience with Spring Boot, Deep production experience with Kafka Streams (topologies, joins, aggregations, windowing, state stores), Experience with event-driven or distributed systems, Hands-on experience with AWS services, Experience with Kubernetes and containerized deployments, Experience with PostgreSQL, MongoDB, and Redis, Strong knowledge of monitoring, debugging, and performance optimization, Ability to work independently in evolving technical environments, Professional English communication skills 📃 Skills: Java, Spring, Kafka, KafkaStreams, AWS, EKS, S3, SQS, SNS, Kinesis, Lambda, Kubernetes, PostgreSQL, MongoDB, Redis, Terraform, Helm, Prometheus, Grafana, Micrometer, Kotlin 🏢 Description: Senior / Staff Backend Engineer (Java, Kafka Streams, AWS) Location: Kraków, hybrid Contract: B2B or UoP B2B budget: up to 210 PLN/h + VAT Work model: around 3 days per week from the office We are looking for a Senior or Staff Backend Engineer to join a small, high-impact engineering team building a large-scale, event-driven platform. This is a hands-on role for someone who enjoys working close to real production systems: high-volume data flows, asynchronous processing, external integrations, reliability, observability and technical ownership. You will join a team where the codebase and domain are evolving, so this is a good opportunity for an engineer who does not need every problem to be fully defined before getting started. You will be expected to investigate, create structure, improve standards and make pragmatic technical decisions. What you will do Build and evolve backend services using Java and Spring Boot Design and maintain real-time event-processing flows using Kafka Streams Work with stream-processing concepts such as topologies, transformations, joins, aggregations, stateful processing and data routing Integrate external systems and infrastructure into a scalable internal platform Improve reliability, observability and production readiness of services handling high-volume data Investigate production issues, performance bottlenecks and data-flow problems Work with AWS, Kubernetes, PostgreSQL, MongoDB, Redis, Terraform and Helm Contribute to code reviews, architecture decisions, documentation and engineering standards Collaborate with product, platform and engineering stakeholders across an international environment What we are looking for 7+ years of backend engineering experience Strong, current hands-on experience with Java and Spring Boot Deep practical experience with Kafka Streams in production This should go beyond Kafka producers/consumers and include work with stream-processing logic, joins, aggregations, windowing, state stores or topology design Background in event-driven, distributed or real-time systems Hands-on AWS experience, ideally with services such as EKS, S3, SQS, SNS, Kinesis or Lambda Experience with Kubernetes , containers and production deployment environments Good understanding of databases such as PostgreSQL, MongoDB and Redis Strong production mindset: monitoring, debugging, reliability, performance and incident investigation Ability to work independently in an evolving and not always fully documented technical environment Clear English communication skills and confidence explaining technical topics to both engineers and non-technical stakeholders Nice to have Kotlin experience Experience with high-throughput data processing or streaming platforms Terraform, Helm, Prometheus, Grafana, Micrometer or similar observability tooling Experience in a small product team, scale-up or ownership-heavy engineering environment Familiarity with AI-assisted development tools What you can expect A technically challenging role focused on real production systems rather than isolated feature delivery Strong ownership Small team setup with room to influence architecture, standards and ways of working International engineering environment Clear recruitment process focused on practical engineering discussions Recruitment process Introductory conversation with the Hiring Manager Technical interview focused on Kafka/use cases and Java/code quality Final discussion with senior technical leadership The full company and product context will be shared during the first recruiter call.

🏢 Summary: Staff Software Engineer role on the Data Platform team focused on building and leading the next generation of customer-facing data product experiences. The position involves full-stack development across frontend, backend, APIs, and data-driven workflows to turn data capabilities into intuitive product solutions. You will shape architecture, drive engineering best practices, and deliver production-grade data applications. 🗂️ Requirements: Staff-level software engineering experience, Proven experience leading customer-facing product initiatives from concept to production, Strong full-stack web application development experience, Strong proficiency in TypeScript, Node.js, and React, Experience working with Python-based systems, Experience designing APIs and production backend services, Ability to write maintainable, testable, high-quality code, Strong technical design and architecture communication skills 📃 Skills: TypeScript, React, Node.js, Python, APIs, Architecture, Testing, Observability, Snowflake, dbt, Kafka, Flink, Materialize 🏢 Description: Built is looking for a Staff Software Engineer to join the Data Platform team and lead the next generation of customer-facing data product experiences. In this role, you will build the application layer where data products are discovered, accessed, and used by customers. You will work across frontend, backend, APIs, services, and data-backed application workflows to turn platform capabilities into intuitive product experiences. WHAT YOU'LL DO - Lead the design and delivery of the application-facing data products platform, including product surfaces, backend services, APIs, frontend flows, and reusable patterns. - Build full-stack customer experiences using TypeScript, React, Node.js, Python, and related technologies. - Partner with Product to shape ambiguous ideas into useful customer workflows and offer practical alternatives. - Turn data science prototypes, analytics concepts, and platform capabilities into production-grade product experiences. - Bring strong software engineering practices through technical design, code review, mentoring, testing, and delivery patterns. - Help data engineers expand into software engineering work across frontend, backend, APIs, and production readiness. - Collaborate where data products integrate with application surfaces, platform capabilities, agents, or customer workflows. - Use customer signals, usage data, product feedback, and support insights to guide engineering decisions. SKILLS AND EXPERIENCE REQUIRED - Staff-level software engineering experience leading ambiguous, customer-facing product initiatives from idea through production. - Strong product judgment and ability to assess customer value in workflows and requirements. - Full-stack web application experience with backend-leaning depth. - Strong experience with TypeScript, Node.js, React, and modern web application architecture. - Experience with Python or ability to work effectively in Python-based systems. - Experience designing APIs, service boundaries, reusable application patterns, and production backend systems. - Ability to write high-quality, maintainable code with strong testing, readability, observability, and operational ownership practices. - Strong technical communication skills including design documentation and architecture discussions. - Collaborative leadership and mentoring ability. PREFERRED - Experience building data-heavy product experiences such as analytics products, reporting workflows, benchmarking tools, dashboards, or decision-support products. - Experience working with data engineers, analytics engineers, or data scientists to productionize prototypes. - Experience with AI or agentic product experiences. - Familiarity with Snowflake, dbt, Kafka, Flink, Materialize, or similar data platform technologies. - Experience in fintech, lending, banking, construction, real estate, compliance-heavy SaaS, or similar domains. - Experience with product instrumentation, activation metrics, experimentation, and usage-based iteration. - Experience mentoring engineers from adjacent disciplines into stronger software engineering practices. Benefits - Salary range: $170,000 - $240,000 USD per year. - Equity as part of total compensation. - Medical, dental, and vision coverage. - Unlimited PTO policy. - 401k with match and expedited vesting. - Learning grant program for professional development.

🏢 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.