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September 29, 2026
Full-Stack Developer (React + Java)
Senior • On-site
Kraków, Pl-06, Poland
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Quick Facts
Role: Full-Stack Developer (React + Java)
Focus: Enhancing and maintaining enterprise application modules/components in an agile scrum team
Work model: Hybrid (3 days per week in the office)
Description
Develop and maintain large-scale enterprise applications with React on the front end and Java backend integrations. You will implement robust, scalable, and secure UI, handle backend API work, and troubleshoot production issues with timely fixes.
Responsibilities
- Design, develop, and maintain enterprise-grade applications using React.js
- Build reusable, responsive, high-performance UI components using frontend architecture patterns
- Implement applications and services using Java
- Integrate React applications with Java-based backend services
- Collaborate with UX, backend, QA, and DevOps teams in a structured enterprise environment
- Participate in backend tasks such as API integration, minor enhancements, and bug fixes
- Ensure performance, security, and scalability standards are met
- Participate in agile ceremonies (code reviews, sprint planning, release activities)
- Write unit and automation tests
- Troubleshoot production issues and provide timely fixes
Requirements
- B.S. degree (or equivalent) in Computer Science, Engineering, Mathematics, Physics, or a related technical field; MS strongly preferred
- 2–5 years of experience with React and Java
- Experience with React Hooks and component-based architecture
- Knowledge of JavaScript/TypeScript, DOM, and Modern CSS3
- Experience with Redux and RxJS
- Object-oriented programming experience using Java (and/or C#)
- Experience with relational (RDBMS) and non-relational databases
- Experience integrating REST and WebSocket APIs
- Strong analytical and problem-solving mindset
- Good written and verbal communication skills
Benefits
- Permanent contract from day one
- Additional holidays (Birthday Day Off; 3rd and 5th year anniversary Day Off)
- Gold Medical Package for employees and their families
- Premium life insurance and private pension plan
- Training and development opportunities (soft skills, technical workshops, language classes)
- Volunteer time opportunities
- Well-being programs
- Additional benefits depending on role seniority
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