Senior Java Backend Engineer - Enterprise Upgrade Expert (Remote Poland)

Aether Biomedical is seeking a Senior Java EE Developer to join a consultancy team for a critical modernization project on a banking system. The role focuses on upgrading an existing Java EE/Jakarta EE application, including EJB and major app servers, with remote work available within Poland.

Responsibilities include upgrading the architecture, refactoring code, coordinating with QA/DevOps, and documenting migration steps while enabling knowledge transfer to client teams.