Full Stack Developer (Java + React) 💰 20,000 - 23,700 PLN/MONTH 📍 Warsaw, Poland (Hybrid - 3 days in office, 2 days remote) ☑️ Full-time 🕦 B2B or CoE We’re looking for a talented Full Stack Engineer to join a growing engineering team of an established international tech company focused on building modern, data-driven platforms that power digital transformation in financial and enterprise sectors.If you enjoy working across the full stack - from sleek, interactive UIs to powerful backend systems and thrive in a collaborative environment with modern technologies, we’d love to hear from you.Requirements: 5+ years of experience as a Full Stack Developer working with Java and React.js. Strong knowledge of Spring Boot, Hibernate/JPA, and RESTful API development. Experience with microservices architecture and API gateway integrations. Front-end proficiency in React.js, Redux, TypeScript, HTML5, and CSS3. Experience with UI frameworks like Material-UI, Bootstrap, or Tailwind CSS. Knowledge of authentication and authorization mechanisms (OAuth2, JWT, session-based). Familiarity with SQL and NoSQL databases (PostgreSQL, MySQL, MongoDB, Redis). Practical experience with CI/CD tools (Jenkins, GitHub Actions, GitLab CI/CD). Exposure to cloud platforms (AWS, Azure, or GCP) and containerization using Docker and Kubernetes Nice to have: Familiarity with GraphQL or event-driven architectures. Experience with monitoring tools (Prometheus, ELK stack). Background in fintech or regulated industries. Responsibilities: Develop and maintain RESTful APIs and microservices with Java, Spring Boot, Hibernate, and JPA. Design, develop, and maintain front-end components using React.js, Redux, and modern JavaScript (ES6+). Build responsive and high-performance user interfaces ensuring great UX. Implement robust authentication, authorization, and data management mechanisms. Work with relational and NoSQL databases such as PostgreSQL, MySQL, and MongoDB. Manage deployment processes through CI/CD pipelines and containerization tools like Docker and Kubernetes. Get to know DevsDataWe are a technology consulting company and a recruitment agency, delivering software solutions to clients from Europe and the US. We work 100% remotely, in an international team. We employ people with experience in international corporations as well as the ones from the best technical and business universities. Find out more: https://devsdata.com