Senior Backend Engineer

• This role is on-site in San Francisco in the Dogpatch neighborhood.
• This isn't a role where you'll be handed a spec and asked to execute. You'll own problems end-to-end: figuring out the right approach, building it, and iterating based on what you learn.
• Analytics rewrite: Migrating our analytics service to ClickHouse and rebuilding it to scale through our next 10x of growth
• Hallucination detection: Improving our detection systems with the goal of driving hallucination rates toward zero
• Browser use agent: Scaling, stabilizing, and adding features and accuracy to our browser use agent in lieu of formal customer APIs
• Backend: Python (Django/FastAPI), TypeScript (Node.js)
• Infrastructure: AWS, Modal, Kubernetes, Postgres
• Frontend: TypeScript, Next.js (you'll interact with this, but it's not the focus)
• Have 4+ years building backend systems, ideally at companies where reliability and scale mattered
• Are comfortable with ambiguity: you can take a loosely-defined problem and figure out what to build
• You'll jump into unfamiliar parts of the codebase when that's what the problem requires
• Write clean code and care about getting the details right, but also know when to ship
• Want to work on hard problems with a small team where your work has obvious impact
• Are excited about AI agents and the infrastructure challenges that come with running them in production

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