Software Engineer, Agent Platform

About this role

Anduril Industries seeks a backend software engineer to design and maintain an internal LLM agent framework that enables teams across the organization to build, evaluate, and deploy AI agents for defense applications. You'll work at the intersection of backend infrastructure, AI systems, and agent architecture to support mission-critical deployments.

What you'll do

• Own the core LLM agent framework including abstractions, runtime architecture, and developer experience
• Support business lines building agents with new capabilities, guidance, and architectural reviews
• Partner with ML teams to integrate model post-training workflows like fine-tuning and reinforcement learning
• Design tooling for modern agent patterns including tool calling, memory, planning, and human-in-the-loop workflows
• Develop comprehensive evaluation suites measuring task success, robustness, and deployment readiness
• Stay current on emerging agent architecture trends and make adoption decisions

What they're looking for

• Backend platform and infrastructure engineering
• LLM agent framework design and orchestration patterns
• Agent evaluation paradigm design
• Model post-training workflows (SFT, preference tuning, RL)
• Reliability and observability for high-stakes LLM applications
• Kubernetes and distributed systems
• API and framework design
• Collaboration across technical teams

Benefits

• Competitive salary range: $220,000–$292,000 USD
• Equity grants included in majority of full-time offers
• Top-tier benefits package for full-time employees