Goaly · Palo Alto, CA, USA
Skills: TypeScript, Python, Rust, Docker
ABOUT US We’re building toward a world where every company can become its own AI lab. Goaly is a stealth AI startup founded by ex-Meta Superintelligence Labs engineers and researchers. Our mission is to dramatically lower the cost, time, and talent barriers to building proprietary AI — and make each generation of models faster and cheaper to build than the last. Backed by leading AI investors and endorsed by frontier AI researchers and builders, we’re looking for exceptional new grads who want to work on hard, foundational AI systems problems with outsized ownership from day one. ABOUT THE ROLE You will be one of the first engineers building the layer between frontier models and real users: the agent harness. That means the loop, the tools, the context, the sandbox the agent runs in, and the evals that tell us whether it actually works. You will ship this into production for real customers, then turn what we learn from those runs into better environments, better evals, and better models. This is a founding role. There is no playbook yet; you help write it. You will own problems end to end, from the first prototype with a customer to a system that runs thousands of agent rollouts a day without anyone watching it. WHAT YOU'LL DO - Own the harness: the agent loop, tool interface, system prompts, permissions, stop conditions, retries, budget caps, and output checks that turn a model into a dependable agent. - Build sandboxed execution environments (containers / microVMs) that are isolated, reproducible, and fast enough to run thousands of rollouts in parallel, used both for serving and for RL and evals. - Design context engineering: what goes into the window, when to compact, file-backed memory and state, retrieval, and hand-offs between sub-agents on long-running tasks. - Make every agent run observable and replayable: trace every model call, tool call, and state change, so a failure at 3am can be reproduced at 9am. - Build the eval stack: offline suites, tests on prod…
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