Senior Java Engineer – Real‑Time Payments (Hybrid)

Fynity; London; Hybrid; GBP 70,000 - 90,000; Full time

Benefits offered by this job

Hybrid working

Collaboration with global banks

Fast-paced, product-led environment

Job summary

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.

Qualifications

• Strong hands-on experience with Java 11+, ideally Java 17.
• Solid knowledge of Reactive Programming frameworks.
• Experience with real-time messaging systems.

Responsibilities

• Design and build scalable, high-availability systems.
• Contribute to architectural decisions.
• Collaborate within Agile teams.

Skills

Java 11+

Reactive Programming

Asynchronous Programming

Kafka

Agile methodologies

Tools

Spring WebFlux

AKKA

Job description

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.