Senior Agent Harness Engineer

📋 Description

• Own developer and agent experience: Set the roadmap for how our engineers and coding agents
• Build the cloud coding experience: Build the developer-facing layer around our existing compute
• Improve agent output at the source: Change repository structure, interfaces, documentation
• Engineer context deliberately: Design what agents receive up front, discover progressively
• Own our internal skills system: Raise the quality of our shared skills and instructions through
• Fix everyday developer friction: Improve CI speed and reliability, local setup, testing, debugging

🎯 Requirements

• Exceptional with coding agents: You use Claude Code, Codex, Cursor, or similar tools for
• Internal tools with real users: You have built developer tooling or a platform that engineers
• CI or large-codebase experience: You have made a meaningful improvement to CI, testing, repository
• Product judgment for internal systems: You can interview developers, separate symptoms from root
• Strong software engineering: You have built and operated substantial production software. We are
• Evaluation over intuition: You know that agent behavior is nondeterministic and changing quickly.

🎁 Benefits

• Competitive salary and equity package
• Unlimited PTO + paid company holidays
• Access to holistic medical, dental, and vision plans
• Company 401(k), Commuter, and HSA/FSA plans
• NYC office in the heart of Manhattan
• Lunch and snacks provided in the office