Senior Member of Technical Staff, Harness Engineering
About the role
The role involves building agent-loop primitives, shipping execution-environment infra, owning tool layers for specific domains, and improving the harness SDK. It also includes wire model-provider routing, provider fallback chains, and evaluating cost/latency tradeoffs.
Responsibilities
- Build agent-loop primitives
- Ship execution-environment infra
- Owain tool layers for specific domains
- Wire model-provider routing
- Evaluate cost/latency tradeoffs
- Own the tool layer for your domains
- Schema, auth, rate-limit, observability per tool
- Tools other engineers build on
- Ship harness SDK improvements
- Eat your own dog food
Requirements
3–6 years building software, with production agentic systems behind you (real users, real traffic — not demos) and experience with at least one major agent framework. Production agent/LLM systems experience: agent loops, tool integration, prompt engineering at scale. Strong written communication (API contracts, integration guides, internal docs).
Qualifications
Experience with at least one major agent framework, thinking in tool design, not just prompt design, and defending tool-design decisions in three years. Experience writing code with AI daily and managing 3+ parallel sessions.
Skills
Strong written communication (API contracts, integration guides, internal docs). Bonus: sandbox/isolation infrastructure; open-source agent-framework contributions; foundation-model partner or early-access experience.
Benefits
Uber commuter benefits; breakfast, lunch, and dinner provided; snacks and coffee stocked; free gym membership; health, dental, and vision.
Pay
$187,000–$264,000 cash (base + target performance bonus), plus competitive equity.
Schedule
In-office, on-site, long days, high standards.