Java Engineer – Trading APIs & High-Performance (Hybrid)

Harrington Starr in London is seeking a Java Engineer to join a fintech's institutional trading tech team. You’ll help build high-performance trading APIs used by global markets, focusing on performance, reliability and resilience.

You'll work on asynchronous, event-driven systems, multithreaded architectures and external API integrations, with AWS-based cloud development and close collaboration with product and business stakeholders. Hybrid work, three days onsite.