Java Developer – Front Office / Trading Systems

Java Developer – Front Office / Trading Systems

Join MARGO in the UK (London) – Perm & Contracting Opportunity*

MARGO is a tech-native consultancy delivering high value-added IT expertise to the financial services industry.

We specialise in complex software engineering environments where performance, robustness and scalability are critical: low latency systems, real-time data processing, distributed architectures and high-volume flows.

Joining MARGO means working in demanding Front Office and Risk IT environments, while benefiting from a human-sized structure, close follow-up and tailor-made training paths.

Business Context

You will join the Front Office / Trading IT environment of one of our tier-1 investment banking partners.

The teams design and maintain mission-critical Java systems supporting electronic trading activities across multiple asset classes (e.g. Equities, Fixed Income, Commodities, FX, Derivatives).

The environment is characterised by

• Real-time and event-driven architectures
• High performance and low-latency constraints
• Close interaction with trading, quantitative and risk teams
• Short delivery cycles and high engineering standards

Role Overview

• We are looking for an experienced Java Developer to work on real-time trading and risk systems.
• The role is primarily technical, focused on software engineering excellence rather than business analysis.
• Candidates are expected to have prior exposure to Front Office, Trading or Risk environments, regardless of the underlying asset class.

Key Responsibilities

Design & Development

• Design, develop and maintain high-performance Java applications
• Work on real-time data processing (market data, pricing, orders, analytics)
• Implement multithreading and concurrency patterns adapted to performance-critical systems
• Participate in system design, architecture discussions and technical specifications
• Continuously optimise performance (latency, throughput, memory, GC behaviour)

Engineering & Delivery

• Contribute to the full software lifecycle: design, development, testing and release
• Produce clean, maintainable and well-tested code
• Participate in sprint planning, estimations and technical reviews
• Collaborate closely with developers, quant and infrastructure teams

Production & Support

• Provide 3rd line support on production systems when required
• Participate in production releases (including occasional out-of-hours interventions)
• Contribute to system stability, monitoring and incident prevention

Technical Environment

Core Technologies

• Java (expert level)
• Multithreading & concurrency
• Performance optimisation & low latency techniques
• Garbage Collection awareness
• Linux / UNIX environments
• Distributed systems and messaging architectures
• Performance monitoring and profiling tools

Valued Technical Exposure

• Event-driven or real-time systems
• Messaging middleware (Kafka, Solace or equivalent)
• FIX or other market connectivity protocols
• Networking fundamentals (TCP/IP, multicast)

Required Experience & Skills

Essential

• Strong experience as a Java Developer in performance-critical environments
• Proven background in low-latency or high-throughput systems
• Solid understanding of concurrency, threading and memory management
• Experience working in Front Office, Trading or Risk IT environments
• Comfortable working in Linux production environments
• Clear communication and structured problem-solving skills

Valued (but not restrictive)

• Exposure to one or more asset classes (Equities, Fixed Income, Commodities, FX, Derivatives)
• Experience in trading, pricing, risk or market data systems

Why Join MARGO

• Access to multi-asset Front Office environments
• Highly technical and challenging engineering assignments
• Strong emphasis on skill development and long-term career progression
• Human-sized consultancy with close support and high-quality missions

• Please note - We do not offer visa sponsorship for this position.
• Interested? Motivated? Apply on our website or at [email hidden — sign in]