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April 8, 2026

Java Fullstack Developer (Java/React)

Mid • Remote

110 - 120 PLN

Warsaw, Poland

Responsibilities:

  • Designing, developing, and maintaining the server-side logic of web applications

  • Implementing scalable and efficient server-side components and APIs

  • Build React/Next.js based applications

  • Working with relational and/or NoSQL databases to store and retrieve data efficiently

  • Designing and optimizing database schemas for performance and scalability

  • Integrating third-party APIs and web services to enhance application functionality

  • Developing custom APIs to facilitate communication between front-end and back-end systems

  • Implementing security best practices to protect against common web application vulnerabilities

  • Conducting regular security audits and implement necessary measures

  • Optimization: optimizing server-side code for maximum speed and scalability

  • Monitoring and troubleshooting performance issues

  • Collaborating with front-end developers, UI/UX designers, and other team members to ensure seamless integration of components

  • Using version control systems (e.g., Git) to manage and track changes to the codebase

  • Conducting thorough testing of server-side components to identify and fix bugs

  • Collaborating with QA engineers for comprehensive testing

  • Clear and comprehensive documentation for back-end systems and APIs

 

Requirements:

  • At least 4 years of experience in a similar position

  • Proficiency in Java server-side programming

  • Thorough understanding of React/Next.js core principles along with React router, hooks, Redux (or the like) workflows, Web performance and security

  • Experience with database systems (e.g., MySQL, PostgreSQL, MongoDB)

  • Proven experience in back-end development and building scalable web applications

  • Strong analytical and problem-solving skills with attention to detail

  • Effective communication skills to collaborate with cross-functional teams

  • Ability to adapt to changing project requirements and technologies

  • English at least B2

Nice to have:

  • Familiarity with cloud platforms (e.g., AWS, Azure, GCP)

  • Previous experience in Front-end development with Docker 

  • Experience with NodeJS 

 

Offer:

  • Private medical care

  • Co-financing for the sports card

  • Constant support of dedicated consultant

  • Employee referral program