Java Backend Developer

Full-time IT

Join our TPA Dev team in Madrid and grow into a Calypso Developer. You’ll start as a seasoned Java backend engineer and receive structured training on Calypso, used for Triparty Collateral Management and Repo Services at SIX. This is an on-the-job learning path: you’ll build production-grade services while deepening your knowledge of Calypso and the post-trade domain.

What You Will Do

• Design, build, and operate backend services in Java for collateral management and repo workflows, evolving into Calypso customizations and integrations.
• Develop robust, multi-threaded services and APIs using Java 8+ and Spring Boot;
  expose and consume RESTful interfaces.
• Implement event-driven integrations (e.G., messaging/streaming) between Calypso and internal/external systems.
• Model, optimize, and maintain relational data structures;
  write efficient SQL andwork with ORM frameworks (Hibernate/JPA).
• Contribute to solution design and architec...