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Java Software Engineer

Job in Greater London, London, Greater London, W1B, England, UK
Listing for: Fynity
Full Time position
Listed on 2026-02-09
Job specializations:
  • Software Development
    Java Developer, Software Engineer, Backend Developer, Cloud Engineer - Software
Job Description & How to Apply Below
Location: Greater London

Overview

🚀 Join a Fin Tech Powering the Future of Payments

Are you a Java Software Engineer who thrives in a fast-paced, agile environment? Passionate about high-throughput, real-time systems? This is your opportunity to help shape the core technology that powers instant payments for some of the world’s largest Banks.

We’re hiring on behalf of a leading payments consultancy, delivering cutting-edge solutions that integrate seamlessly with bank infrastructure to enable real-time, secure transactions across the globe.

What You’ll Be Doing
  • Design and build scalable, high-availability systems processing millions of real-time transactions
  • Work with Java 17+, Spring Web Flux, AKKA, Kafka, and more
  • Write clean, testable code using TDD and BDD
  • Contribute to architectural decisions in a fast-evolving codebase
  • Collaborate within Agile teams (Kanban/Scrum)
What You Bring

We’re looking for engineers who are pragmatic, performance-focused, and thrive on solving complex distributed systems problems.

  • Strong hands-on experience with Java 11+ (ideally Java 17)
  • Solid knowledge of Reactive Programming (e.g., Spring Web Flux, AKKA)
  • Experience with event-driven architecture, real-time messaging systems (Kafka, JMS)
  • Familiarity with asynchronous request handling, scalability, and system resilience
  • Agile mindset, with TDD/BDD and CI/CD experience
  • Bonus:
    Background in Banking/Payments is helpful but not required – if you’ve built high-performance, real-time systems, we want to talk to you.
What’s In It for You
  • đź§  Work with cutting-edge tech on globally impactful systems
  • 🏡 Hybrid working – 1 day a week (or more if you’d like!)
  • 🌍 Opportunity to collaborate with major global banks
  • 🚀 Fast-paced, product-led environment where your voice matters

If you're a motivated Java Software Product Engineer ready to tackle complex challenges and deliver meaningful change, hit apply – and shape the future of payments with us.

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