Principal Harness Engineer

The Principal Harness Engineer role at FICO focuses on engineering the environment that steers AI coding agents toward correct, maintainable, and well-architected output, ensuring quality is enforced by the system. This hands-on technical position involves designing, building, and supporting core harness components, including guides, feedback loops, and guardrails, to transform raw model capability into production-grade engineering. The role requires owning subsystems, setting engineering standards, and managing the end-to-end lifecycle of agent-produced work. The position is based in the United Kingdom and offers a work-from-home arrangement.