Java FX Developer

Java Developer – EFX Spot Execution (Buy-Side, London)

Location
: London (Hybrid)

Firm
: Alternative Investment Fund Manager (AIFM)

Decide your own hours, 3 days a week in London.

The Company

A London-based Alternative Investment Fund Manager is currently going through an IP, building a next-generation electronic FX (EFX) execution platform from the ground up. With senior quants already driving strategy design, the team is expanding with a Java developer to support the build of core systems, connectivity, and execution infrastructure.

This is a rare chance to join a greenfield build inside a buy-side fund, gaining direct exposure to real-time trading systems without needing prior quant or strategy design experience.

Role Overview

As a Java Developer, you\’ll work closely with quant developers and senior engineers to:

• Build and maintain core components of the EFX execution platform.

• Implement connectivity to liquidity providers (LPs), venues, and market data feeds.

• Support development of order management and trade lifecycle processes (OMS/EMS/RMS).

• Contribute to performance improvements in low-latency Java systems.

• Gain exposure to trading systems and market microstructure in G5 FX.

Essential Skills

• Solid core Java development skills (concurrency, multithreading, performance).

• Understanding of data structures, algorithms, and low-latency system design.

• Eagerness to work in financial markets technology (no prior finance experience required).

• Problem-solving mindset with ability to learn from senior engineers.

Nice-to-Haves

• Familiarity with FIX protocol or market connectivity.

• Prior exposure to trading platforms, financial APIs, or messaging systems.

• Interest in electronic trading, FX, or financial engineering.

Who This Role Suits

• A junior-to-mid Java developer who wants to break into financial markets.

• Someone who enjoys working in high-performance, low-latency systems but doesn\’t need to design strategies.

• A developer motivated by the challenge of a greenfield build inside a buy-side fund.