Senior Harness Engineer
Core
Design, build, and deploy harness systems (guides, guardrails, feedback loops) to steer AI coding agents toward producing correct, maintainable, and well-architected software output.
Role type
Senior IC Harness Engineer (AI Agent Infrastructure)
Builds
Production-grade harness environments, agent instruction files, custom linters, static analysis tools, and quality gating mechanisms for AI-generated code.
Domain
Software Engineering / AI Coding Agents / DevOps
Deliverable
production ML models | product features
Required skills
Software architecture and design, AI coding agents (Claude Code, Codex), engineering tooling (linters, CI/CD, containerized environments), spec-driven development, agent orchestration, consumer/contract testing (Pact), security guardrails for autonomous agents, observability, quality-gating processes.
Preferred skills
Experience with AGENTS.md conventions, fitness functions, deterministic vs inferential controls, drift detection, mentorship.
Technologies
Claude Code, Codex, Pact, CI/CD pipelines, containerized environments, static analysis tools, linters.
Responsibilities
Design and evolve feedforward guides and reusable skills for agents; build feedback sensors and verification loops; define quality gating and release criteria for agent-produced work; establish LLM testing infrastructure; run the steering loop to prevent agent mistakes; improve observability of agent work; partner with product teams to enforce specifications; mentor engineers on harness practices.
Seniority
Senior, hands-on IC