Java Software Engineer

Insight Global are seeking a Mid-Level Java Developer to join one of our leading financial services clients. This is a contract-to-hire opportunity based in St Paul’s, London, operating on a hybrid work schedule.

In this role, you’ll be working on the development and enhancement of a mission-critical FX trading platform used by major global banks. The platform supports real-time trading of FX swaps and spot instruments, operating 24/6.5 across international markets. It demands exceptional performance, availability, and resilience.

This is a hands-on role focused on building high-performance, low-latency infrastructure. You’ll work within an agile team, contributing to real-time order matching, trade execution, and market data publishing systems. You’ll be involved in both upstream and downstream development, helping to drive improvements in swap trading functionality and system-wide performance. You’ll contribute to enhancements focused on improving swap trading performance, write clean and testable code, and participate in architectural discussions to drive system improvements.

The applicant must have the following:

• Advanced proficiency in Java

• Strong experience in low-latency, high-throughput systems, particularly within FX trading platforms (e.g. LSE, 360T)

• Deep understanding of efficient garbage collection, memory management, and object modeling

• Unit testing experience with Grabler, JUnit, or similar frameworks

• Proficient in Oracle or similar relational databases

• Comfortable working in agile environments, especially those transitioning from waterfall

It would be a plus if the candidate had the below:

• Knowledge of C++

• Experience with swaps, spot FX instruments, GDP Forex, or Eurodollar markets