Software Engineer, Agents

Responsibilities

• Own agentic features from scoping through implementation, launch, and iteration.
• Design and ship LLM agents, harnesses, verifiers, tools, prompts, and policies.
• Build Python/FastAPI services and Temporal/Modal pipelines for agent runs and human-in-the-loop workflows.
• Develop RL environments, enterprise application simulations, simulated coworkers, and data rooms for frontier-agent tasks.
• Create tooling for statistical analysis, trajectory insights, and automated failure-mode detection.
• Build Next.js/React interfaces and evolve data models, structured context, and audit trails.
• Define agent quality, build evaluations, instrument traces, analyze failures, and improve prompts, tools, guardrails, reliability, cost, latency, and UX.
• Partner with Product, Design, Research, and Operations on agent autonomy and human-approval workflows.

Requirements

• Strong software engineering ability focused on building scalable agentic products.
• Experience or capability across backend, frontend, data infrastructure, orchestration, and LLM-agent systems as reflected in the listed stack.
• Ability to own projects end-to-end and collaborate with researchers, operators, Product, Design, Research, and Operations.

Benefits

• Bi-annual performance bonus structure.
• Generous equity grant vested over four years.
• Up to $15,000 relocation bonus.
• $10,000 housing bonus for employees living within 0.5 miles of an office.
• $1,500 monthly meal stipend.
• Free Equinox membership.
• $200 monthly laundry reimbursement.
• $200 monthly personal wellness reimbursement.
• Health, dental, and vision insurance.
• In-person work five days per week in the San Francisco, New York City, or London office.