Low Latency Java Engineer

  • £120,000 - £160,000 plus generous stock options package.
  • London, , United Kingdom
  • Software Engineering

Do low-latency systems excite you?

Are you a Java Engineer with a passion for building the infrastructure that powers modern financial transactions?


If you thrive in a fast-paced, challenging environment and crave the satisfaction of tackling complex problems, then this position is for you.


This exciting payments startup is seeking a top-tier Java Developer to join their core development team. You'll play a vital role in designing, developing, and optimizing mission-critical components of their platform.


Here's what you bring to the table:

  • 5+ years of back-end engineering experience with a proven track record of success
  • Advanced proficiency in Java (or another JVM language) and a deep understanding of low-latency principles
  • Solid expertise in building high-throughput, distributed systems specifically for payments applications
  • Experience with payments infrastructure: This could include building core payment processing systems, fraud detection systems, or integrations with payment gateways
  • A commitment to clean code: Experience with DDD and TDD is a plus
  • A thirst for knowledge: You're an open-minded quick learner who embraces challenges
  • Startup hustle: You have the drive and determination to tackle ambiguous problems and handle the demands of a fast-paced environment


What you'll be working on:

  • Building payments infrastructure utilizing low-latency technologies: Design and develop components for core processing, risk management, and integrations with payment networks
  • Optimizing the latency and throughput of our systems for peak performance and scalability
  • Implementing advanced fraud detection algorithms
  • Integrating with various payment gateways and other financial services


Tech Stack: Java 17 (upgrading to 21 soon), CQRS, Jooq, Javalin, Aeron cluster (or similar low-latency messaging system), Cloud Platform (e.g., GCP, AWS), Kubernetes, Pulumi, Redis, Pub/Sub


This is a fantastic opportunity to join a talented team and revolutionize the future of payments. Contact Ciara Clarke at Harrington Starr for a confidential discussion on this role.

Ciara Clarke Principal Consultant

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