Full-time

Senior Java Engineer – Reactive (Spring WebFlux)

Posted by Fynity • London Area, United Kingdom, United-Kingdom

📍 London Area, United Kingdom 🕒 February 28, 2026

About the Role

Senior Java Engineer – Reactive (Spring WebFlux)

London – Hybrid (1 day per week onsite)


Are you a senior, hands-on Engineer who thrives in event-driven, asynchronous environments? Do you enjoy building low-latency, high-throughput distributed systems where correctness, resilience, and performance really matter?


This is an opportunity to work at the core of real-time payments infrastructure, helping to power instant transactions for some of the world’s largest banks.


We’re hiring on behalf of a leading payments consultancy delivering mission-critical, event-driven platforms that integrate deeply with bank infrastructure to enable secure, real-time payments at global scale.



What You’ll Be Doing

You’ll play a senior individual-contributor role within a high-performing engineering team, building asynchronous, message-driven systems desig...

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