Senior OMS Developer (Java)

Job Title: Java Developer (OMS Specialist)

Location: London (Hybrid Working)

Working Pattern: 2–3 days onsite per week

Employment Type: Permanent

Overview

A London-based financial technology organisation is seeking an experienced Java

Developer to join its engineering team. The successful candidate will play a key role in

the design, development, and enhancement of a high-performance Order

Management System (OMS) used within a complex trading environment.

Applicants must have hands-on experience designing and building OMS

platforms. This is a non-negotiable requirement.

Key Responsibilities

• Design, develop, and maintain Java-based applications with a focus on Order

Management Systems

• Contribute to the architecture and evolution of OMS components supporting

trade lifecycle management

• Work closely with product owners, quants, and business stakeholders to

translate trading requirements into technical solutions

• Ensure system performance, scalability, and resilience in a high-throughput

environment

• Participate in code reviews, testing, and deployment activities

• Support production systems and assist with troubleshooting and performance

tuning

Essential Skills & Experience

• Strong commercial experience with Java (Java 8+)

• Proven, hands-on experience building and working on Order Management

Systems (OMS)

• Experience within trading, investment management, or capital markets

environments

• Solid understanding of multi-threaded systems and low-latency architectures

• Experience with RESTful APIs and distributed systems

• Strong problem-solving skills and attention to detail

Desirable Skills

• Experience with Spring / Spring Boot

• Knowledge of messaging technologies (e.g. Kafka, JMS, or similar)

• Exposure to SQL and relational databases

• Familiarity with cloud platforms and containerisation (Docker, Kubernetes)

• Experience working in Agile / Scrum environments

Working Environment

• Hybrid working model with a London office base

• Collaborative, engineering-led culture

• Opportunity to work on mission-critical trading systems with real-world impact