Senior Full Stack Engineer
Ciklum is looking for a Senior Full Stack 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 Senior Full Stack Engineer, become a part of a cross-functional development team engineering experiences of tomorrow. Responsibilities: Design, develop, and maintain full-stack features across UI, backend services, APIs, and data layers Build and own automated test frameworks (unit, integration, E2E, API, performance) integrated into CI/CD pipelines (GitHub, GitHub Actions, Octopus, Jenkins) Execute API contract testing, load/performance testing, exploratory and functional testing across microservices Debug production and pre-prod issues in distributed systems through log analysis, distributed tracing, and root cause investigation Contribute to architecture discussions, code reviews, and shift-left quality practices Participate in Agile ceremonies, sprint planning, and align deliverables with sprint goals Requirements: Proven full-stack development experience across UI, React, React Native, Next.js, backend, .NET/Core, Go, Node.js, APIs and SQL/NoSQL data stores (SQL Server, MySQL, Redis) Hands-on with modern automation frameworks: Playwright, Cypress, Appium, REST Assured, Postman Proficient in Java, JavaScript/TypeScript; comfortable writing both production code and test code Performance and load testing experience with JMeter, k6, or Gatling Experience with CI/CD tooling, containerization (Docker/Kubernetes), and observability stacks (logs, metrics, traces) Strong debugging skills in distributed/microservice architectures Effective communicator able to collaborate across engineering, product, and QA functions 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. #LI-JW1 Apply To This Job