Senior Java Engineer – Real‑Time Payments (Hybrid)

A leading payments consultancy in London is seeking a Principal Software Engineer to design scalable, high-availability systems. You will work with Java 17+, Spring WebFlux, and Kafka in a hybrid environment, contributing to real-time transaction solutions for major global banks. Ideal candidates have strong experience in reactive programming and an agile mindset, ready to tackle complex challenges in a fast-paced setting.