Senior Software EngineerClient is seeking a Senior Software Engineer to own mission-critical systems end-to-end. This role is ideal for an engineer who moves fast, ships to production frequently, and thrives in a high-impact environment. You will:Architect and ship full-stack product features (React, TypeScript, Node.js, Postgres)Build scalable, AI-powered workflows for modern, fast-growing startupsWork directly with founders and lead key technical decisionsMentor engineers and help define engineering cultureOperate autonomously in a fast-paced environment with high trust and ownershipResponsibilities:Design, build, and scale production systems end-to-endShip full-stack features using React, TypeScript, Node.js, PostgresOwn architectural decisions and influence long-term technical strategyWork closely with founders and cross-functional teamsBuild reliable, AI-powered automation workflowsImprove internal tooling, developer experience, and performanceMentor junior engineers and help shape engineering best practicesRequirements:4–8 years engineering experience at a high-growth startup or top AI company (e.g., Stripe, Ramp, OpenAI, Anthropic)Strong backend or full-stack depth across React, Node.js, Postgres (or equivalent)Proven ability to ship and scale production systemsMust be in-person in San Francisco, 5 days per weekHigh-agency builder who thrives in ambiguity and self-unblocksBenefits & Perks:100% medical, dental, vision (employee); partial for dependents401k with employer matchUnlimited PTO + federal holidaysAll meals covered in-office + GrubHub stipendGym membership fully coveredFrequent team dinners, events, off-sitesMission-driven work: eliminate busywork for humanity