Senior Java Backend Engineer for Payments & Microservices

VASS UK&I in London is seeking an experienced Senior Java Software Engineer to join a team developing and supporting modern payment-processing systems. This six-month contract role focuses on building secure, scalable backend applications with Java, Spring Boot, and microservices.

You will connect systems via APIs and messaging, monitor performance, resolve complex issues, and promote engineering best practices while delivering reliable production-ready solutions.

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