Top Tech Jobs & Startup Jobs in San Francisco Bay Area, CA

Build and operate Sauna’s stateful agent runtime, including session state, tool-call retries, timeouts, concurrency, actor-versus-job execution, and recovery across deployments. Develop production backend systems that resume interrupted work, trace runtime failures, and support long-running processes through code releases. The role requires hands-on TypeScript development using Cloudflare Workers, Durable Objects, Postgres, and Docker.

Own and build Sauna’s product experience across web and other interfaces, with a frontend-focused full-stack role. Design and ship delegation, memory, routines, collaboration, onboarding, billing, and high-performance local-first features. Work across interaction design, React architecture, APIs, database migrations, analytics, realtime systems, caching, and optimistic updates. Candidates should independently turn rough ideas into polished products, iterate from feedback, and care deeply about usability, performance, and craft.

Own the technical systems supporting customer acquisition and growth, including conversion tracking, attribution, integrations, funnel experiments, analytics, and internal automation. Build website experiences in TypeScript and React, analyze funnels and cohorts with SQL and PostHog, reconcile marketing and billing data, and run statistically sound experiments. Partner with marketing and product teams, maintain reliable event instrumentation, document decisions, test releases, and monitor production systems.

Film the founder and office daily, back up and organize footage, edit videos rapidly, write captions, create hooks, resize content, and publish five weekly pieces across X, LinkedIn, Instagram, and YouTube Shorts. Maintain a searchable media library, convert concepts into shot lists, manage an AI-assisted production pipeline, and support the Creative Director with capture and first cuts while maintaining quality and consistency.

Own demand generation for Sauna from awareness through signup. Launch and optimize Meta and Google advertising, build creator and affiliate programs, develop content, SEO, AEO, lifecycle marketing, landing pages, and launches. Establish accurate conversion tracking, CAC, channel economics, and usage-based cost measurement. The role is hands-on, requiring the marketer to write copy, brief creative, buy media, analyze performance, and eventually hire channel specialists.

Build, refine, and scale production agent systems: multi-step tool-using agents, memory systems, proactive agents, and evaluation frameworks. Ensure fast, predictable, traceable behavior and uptime while working across infra, frontend, and product.

Early-stage AI startup seeking an ex-YC founder to join a 15-person team in San Francisco full-time. Role is flexible (engineering, product, or growth), requires hands-on startup experience, willingness to wear multiple hats, strong enthusiasm for AI agents, and commitment to work from the Presidio office five days a week. US work authorization required; O-1 or J-1 sponsorship may be available for exceptional candidates.

Senior individual contributor who provides architectural leadership and ships production code. Design scalable, multi-tenant agent/LLM systems, define reliability/observability (SLOs, tracing, incident response), review major PRs, and implement high-impact infrastructure decisions for a small engineering team.

Seeking former founders or product leaders to join full-time in-person at the San Francisco Presidio office. Ideal candidates raised >$5M, reached $500k+ ARR, or were the main person shipping a standout product. Role is flexible across engineering, product, or growth; scope will be built around strengths. Candidates must be Bay Area–based or willing to relocate, have US work authorization (O-1/J-1 sponsorship possible for exceptional candidates), and be able to propose what they'd own in the first 90 days.

Lead consumer growth from thousands to millions: own social virality, programmatic SEO, paid channels, content, partnerships, and outreach; build viral loops; partner with engineering; and hire and manage a growth team as channels scale.