Senior Java Software Engineer

ONLY FOR CANDIDATES BASED IN POLAND Location: Poland (Remote) | Type: B2B, Full-time | FinTech, Blockchain, AI I'm currently looking for an experienced Java Backend Engineer ready to take on new challenges in their career! My client is building the new operating system (O/S) for global finance. The company is growing fast, with $400B on the platform in 2025 and $1T in 2026. They are building "unified ledgers" with massive infrastructure (currently 20 million transactions per day, ready to scale up to 50 million). If you are looking for a challenging, greenfield/sandbox environment and working alongside experienced software engineers, this might be a role for you! Designing and developing scalable, high-performance financial applications; Leading code reviews, technical decisions , and system architecture discussions; Solve complex engineering challenges while maintaining coding best practices. 6+ years of software development experience; Strong coding expertise in Java and frameworks like Spring, Spring Boot; Knowledge of SQL, MongoDB , and scalable database structures; Experience across the full software development lifecycle; Experience working with microservices and Kubernetes/Docker; Bonus Experience with blockchain and/or AI is a huge plus! JOB DETAILS Type: B2B Work arrangement: Remote or Hybrid ( if based in Wroclaw) Salary: $6000+ per month (VAT not applicable, international invoice) + paid holidays Join as a Backend Engineer and help build the future of fintech! If you have any questions or you want to apply directly, email: a.sawa@ltharper.com J-18808-Ljbffr