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November 4, 2026
Java and React Full Stack Developer
Mid • Remote
100 - 160 PLN/yr
Warsaw, Poland
Quick Facts
Role: Java and React Full Stack Developer (Mid and Senior)
Description
You will design, build, and test features end-to-end with full ownership of code and quality, working across backend and frontend. The role focuses on Java backend development and modern UI development with React, including API integration and relational database work. You’ll also collaborate on automated test coverage using unit/integration tests and Cucumber-based end-to-end tests.
Responsibilities
Design, develop, and maintain features using Java and React
Build responsive, modern frontend applications with ReactJS
Develop and integrate APIs and web services
Work with relational databases (Oracle, Postgres)
Write clean, well-structured unit tests (JUnit or equivalent)
Contribute to an automated test framework using Ruby and Cucumber
Write Ruby step definitions as needed
Create and maintain Cucumber feature files for end-to-end testing
Write automated tests for features built by other engineers
Champion a test-first approach for reliable, maintainable, scalable code
Apply performance/scalability considerations (e.g., JMeter) when required
Embed instrumentation, configuration, and logging for monitoring and support
Analyze and debug issues using logs; propose and implement fixes
Collaborate in Agile ceremonies to plan and deliver sprint goals
Partner with product managers and analysts to understand functional and non-functional needs
Work with a product mindset for long-term supportability and client impact
Requirements
Proficiency in Java with strong unit testing experience (JUnit or equivalent)
Proficiency in React and relevant unit testing frameworks
Experience with automated test frameworks and languages
Ruby scripting for step definitions (nice to have)
Cucumber for end-to-end testing
Strong understanding of multi-threading, parallel processing, and real-time messaging
Test-first design and CI/CD practices
Ability to use JMeter or similar tools for performance testing (plus)
Practical understanding of cloud services (databases, servers, storage, gateways)
Experience using AI-assisted engineering tools (e.g., GitHub Copilot, ChatGPT) while maintaining code quality and critical thinking
Benefits
Long-term cooperation
Benefit package: multisport, private medical care, life insurance
Training budget
Free English lessons
Dedicated company mentor support
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