Senior Software Engineer

Overview

In this role you will design and build Java services for IG Group’s Order Management System within a trading platform, focusing on correctness and low latency. You’ll work closely with product and business stakeholders to shape requirements and deliver end-to-end solutions. The position combines hands-on coding with system design, testing, and production support in a high-stakes environment. You’ll contribute to AI-enabled development while ensuring clear decisions and robust observability. This is a chance to influence core trading workflows and scale mission-critical services.

Pay / Benefits

• Competitive salary
• Flexible benefits package
• Private medical cover for you and family
• Life insurance
• Gym memberships
• 25 days holiday + birthday + voluntary work days (total 28) + buy/sell holiday option

Responsibilities

• Own work from elaboration to delivery and support, shaping requirements and delivering end-to-end solutions
• Design and build low-latency, high-throughput Java services for order lifecycle management
• Build and maintain market connectivity including FIX sessions and venue protocols
• Model and evolve order and execution state across multiple life-cycle events
• Ensure correctness with idempotency, ordering guarantees, deterministic replay, and auditable order trails
• Provide production support during market hours and participate in on-call rotation
• Improve developer experience through code review, pairing, mentoring, and tooling/observability enhancements
• Translate between trading language and system behavior with traders and stakeholders
• Utilize AI-assisted development tools while maintaining accountability for production safety
• Contribute to automation, testing, documentation, migrations, and support tooling in an AI-enabled workflow

Key requirements

• Strong commercial experience building and running production Java backend systems on a recent LTS JVM (17/21+)
• Deep JVM knowledge: concurrency, memory model, profiling latency/throughput
• Distributed systems fundamentals: messaging, delivery guarantees, backpressure, failure recovery
• Unit/integration/end-to-end testing with deterministic or property-based approaches
• Solid SQL and relational data modeling with careful schema evolution
• CI/CD, containers, infrastructure as code, production observability (metrics, tracing, logging)
• Clear, effective communication with technical and non-technical audiences
• Ownership mindset from vague requirement to running, documented software
• Trading domain experience is strongly preferred

• Clear communication
• Ownership and accountability
• Collaborative problem-solving
• Java backend development on a modern JVM
• Concurrency and performance tuning on the JVM
• Distributed systems concepts: idempotency, ordering, replay, recovery

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