Simulation Engineer

Simulation Software Engineer

You'll own substantial parts of a simulation engine that powers continent-scale defence training environments — covering the behaviour and interactions of pedestrians, traffic, shipping, aircraft, satellites, and critical national infrastructure. You'll shape how simulated actors decide and act, how simulation state stays coherent across a compute cluster, and how LLM-backed capabilities (natural language control, actor generation, simulated social media) are brought into the engine.

Work spans a C++ simulation engine, a custom distribution framework, and a TypeScript/React front-end, within a cross-functional team of Software, QA, and DevOps Engineers.

Key Responsibilities

• Design and implement behaviour/decision-making logic for simulated entities in C++
• Integrate third-party simulation libraries into a coherent system
• Design simulation state partitioning across a distribution framework (IPC, bandwidth, fidelity)
• Extend REST services and TypeScript/React front-end across the web/sim boundary
• Write design docs and run design reviews
• Review peers' designs and code; collaborate with Product and defence stakeholders
• Mentor teammates through pairing and code review
• Deploy and support the product on-site at customer exercises, hackathons, and industry events

Requirements

• 4+ years software engineering experience
• Experience in behavioural or agent-based simulation (game AI, VFX crowd sim, CGF, or similar)
• Strong C++ for performance-sensitive, real-time systems
• Knowledge of spatial data structures, path planning, decision modelling, vehicle movement
• Ability to reason about distributed simulation design (IPC, bandwidth, domain partitioning)
• Comfortable moving between languages and stack layers
• Proactive, communicative style — able to challenge and draw out contributions
• Product engineering mindset
• Comfortable with AI-assisted development workflows
• Eligible for UK SC-level security clearance
• Able to attend Shoreditch office at least once per week

Nice to Have

• LLM-enabled product feature experience (NL interfaces, content generation, agent behaviour)
• Rust, particularly for distributed/systems-level work
• Geospatial concepts and map data processing for simulation
• Defence sector, military modelling/simulation, or wargaming familiarity
• Kubernetes for compute cluster orchestration
• Prior tech lead experience or interest in that pathway

Benefits

• Hybrid (1 day/week in Shoreditch)
• Private health insurance
• Enhanced pension
• Enhanced parental leave
• 3 extra days off at Christmas (on top of 25 days)
• L&D budget
• Regular socials
• Share options