Senior Java DeveloperSKILLS: Java | syntax C++ | PostgreSQL | GitB2B: PLN 125 - 175 / Hour 💰LOCATION: REMOTE (POLAND)START DATE: March 2026END DATE: June 2026Key Duties and Requirements: A Roadmap to Your Professional Success 🚀Scope of responsibilities: Rewrite existing system components from C++ to Java (primarily backend). Maintain high code quality and compliance with the established architecture. Collaborate closely with developers, analysts, testers, and the solution architect. Participate in daily stand-ups, code reviews, and other team ceremonies. Propose improvements to implementation and architecture when necessary. Here’s a set of skills we require: 5+ years of professional experience in Java development. Strong knowledge of Java 8+ and the Spring ecosystem (Spring Boot, Spring Data, etc.). Experience working with complex monolithic or distributed systems. Ability to read and analyze existing code in other technologies (e.g. C++, Delphi, .NET). Solid understanding of relational databases (PostgreSQL, Oracle, MySQL, etc.). Proficiency with Git and build tools (Maven or Gradle). Commitment to clean code principles, refactoring, and code quality. Good communication and teamwork skills. Polish language - native Nice to have: Experience with legacy system migrations. Knowledge of design patterns and microservice architecture. Familiarity with testing and monitoring tools (e.g. JUnit, Mockito, Prometheus).