Software System Engineer in London

We're looking for a highly driven software engineer to help make our simulation capabilities accessible to both humans and LLM agents. You will architect and deliver systems that enable Anduril's Advanced Capabilities team to define and explore how fleets of heterogeneous autonomous systems operate alongside humans in complex and contested environments. If you're an engineer who thrives on solving hard problems and wants to build software that redefines the future of defence, this is your opportunity.

Responsibilities include:

• Design and build the agent integration layer: tool schemas, context management, retrieval over simulation state, and guardrails that let LLM agents reliably author scenarios, task entities, generate visualisations, and perform real-time analysis across our wargaming applications.
• Architect APIs and service contracts (gRPC/protobuf) with both human and machine consumers in mind.
• Build robust, high-performance backend services in Go that coordinate with downstream components in C++ and Rust handling scenario execution, physics modeling, and autonomy.
• Deploy and maintain services on Kubernetes infrastructure, ensuring reliability and performance.
• Collaborate closely with game engineers, robotics engineers, autonomy specialists, and war fighters to translate technical capabilities into reliable, performant features.
• Identify bottlenecks and optimise features across the stack, from database queries to model inference.

Qualifications:

• Bachelor's degree in Computer Science or related field.
• Strong proficiency in a garbage collected language (we use Go and Python).
• Comfortable reading and working with C++ and Rust codebases.
• Experience building and deploying distributed systems with containerization and orchestration platforms (K8s).
• Understanding of databases, data modeling, and system architecture.
• Familiarity with gRPC/protobuf or similar RPC technologies.
• A bias for action, extreme ownership, and the drive to see projects through from concept to production.
• Comfortable making decisions with incomplete information and shipping incrementally.
• Eligible to obtain and maintain an active UKSV Security Clearance.
• Experience shipping production agentic systems (not just prototypes).
• Experience in defence, aerospace, robotics, or other real-time C2 systems.

The salary range for this role is an estimate based on a wide range of compensation factors, inclusive of base salary only. Actual salary offer may vary based on (but not limited to) work experience, education and/or training, critical skills, and/or business considerations. Highly competitive equity grants are included in the majority of full time offers; and are considered part of Anduril's total compensation package. Additionally, Anduril offers top-tier benefits for full-time employees, including a comprehensive, competitive benefits package (available at little to no cost to employees) that ensures you’re supported in health, recovery, and whatever comes next.