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413 founding jobs at 208 companies in San Francisco, CA

3mo
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Founding Recruiter
San Francisco, California, United States
$150k-$225k/yr OnsiteFull Time
Conversion
Conversion: AI-native marketing automation platform for modern B2B companies.
Recruiting for a founding recruiter to build hiring processes for a growing AI-native marketing automation startup.
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2mo
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Founding Designer
San Francisco or New York City
$175k-$205k/yr RemoteFull Time
Centralize
Centralize: AI-powered relationship intelligence platform for enterprise sales teams.
Founding designer role; strong visual design, design systems, branding, and production familiarity; able to prototype and sometimes code designs; excellent English communication; independent contributor.
React, CSS, Claude Code
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6d
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Founding Engineer (Full Stack / AI)
San Francisco, California, United States
OnsiteFull Time
Olto
Olto: AI-powered demo automation platform for B2B sales teams.
Founding engineering role focused on full-stack and AI development in San Francisco.
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3mo
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Founding Software Engineer
San Francisco, California, United States
$150k-$250k/yr OnsiteFull Time
Tamarind Bio
Tamarind Bio: AI-powered platform for computational biology and drug discovery.
Founding software engineer with full-stack expertise; strong AWS, Docker, CUDA, TensorFlow/PyTorch; React; onsite in SF; equity.
Python, React, AWS, Docker, CUDA, Conda, TensorFlow, PyTorch, Slurm, Bash, APIs, Web apps
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2mo
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Founding Head of Marketing
Cupertino, California, United States
OnsiteFull Time
Hiring.Cafe
Hiring.Cafe: An AI-powered job search engine and aggregator.
Founding head of marketing with strong social media, growth mindset, technical fluency, and startup hustle; willing to commit 50+ hours/week in Cupertino.
Social media, Analytics tools
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3mo
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Founding Research Scientist, Human Simulation
San Francisco, California, United States
OnsiteFull Time
Listen Labs
Listen Labs: Automates customer research interviews through generative AI platforms.
Strong research track record in AI, LLMs, post-training, RLHF, behavioral modeling, or simulation. Founding role; ability to define problems, scope programs, and communicate clearly.
Machine Learning, Natural Language Processing, RLHF, Evaluation, Simulation
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2mo
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Founding Engineer
San Francisco, California, United States
$175k-$225k/yr OnsiteFull Time
Clera
Clera: AI talent agent matching professionals with high-growth startup roles
2+ YOEComputer Science degree required, 2+ years professional software engineering experience, strong CS fundamentals, startup experience valued, proficiency in Python (typed scientific Python).
Python
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1mo
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Founding Researcher
San Francisco, California, United States
$400k-$500k/yr OnsiteFull Time
Miso Labs
Miso Labs: Developing emotive foundation models for real-time voice AI.
Bachelor's degree or equivalent experience in a technical field, hands-on research and engineering on model training, experience with PyTorch and CUDA, ability to own long-term research outcomes.
PyTorch, CUDA, H100, STT, LLM, TTS
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1mo
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Founding Marketer
San Francisco, California, United States
$180k-$280k/yr OnsiteFull Time
TypeSafe AI
TypeSafe AI: Building reliable, general frontier AI models for automation.
5+ YOEBuild marketing from zero at a startup, 5+ years experience, strong writing, product launches, demand generation, fluent in AI and APIs, tactical across social/SEO/email.
X, LinkedIn
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3mo
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Founding Marketer
San Francisco, California, United States
$100k-$140k/yr OnsiteFull Time
Workweave
Workweave: AI-powered software engineering intelligence and productivity platform.
Proven launch-video track record; viral content on X/LinkedIn; advanced editing; strong writing; product taste; fast, outcome-driven; interest in developer tools.
Premiere, After Effects, Figma, CapCut
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3mo
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Founding Marketer
Palo Alto, California, United States
$175k-$250k/yr HybridFull Time
Nectar Social
Nectar Social: AI platform for social commerce and community management.
5+ YOE5+ years in marketing at high-growth B2B SaaS/consumer-tech; ownership of multiple marketing functions; strong writing; marketers to consumer brands; able to launch end-to-end.
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2mo
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Founding Engineer
San Francisco, California, United States
$120k-$160k/yr OnsiteFull Time
Aurorin
Aurorin: Modern AI-native CAD software for mechanical engineers
Strong systems programming/native app background, experience with Swift and C++, GPU programming experience preferred, proactive and high-responsibility engineer.
Swift, C++
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2mo
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Founding Recruiter
San Francisco, California, United States
$170k-$210k/yr OnsiteFull Time
Lightfield: AI-powered CRM automating customer interaction capture and insights.
5+ YOE5+ years of full-cycle recruiting, with a focus on scaling engineering teams in fast-paced environments.
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2mo
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Founding BDR
San Francisco, California, United States
OnsiteFull Time
Composio
Composio: Infrastructure and toolkits for building functional AI agents.
1+ YOE1–2 years in Sales/SDR/BDR in SaaS or tech; strong communication with developers and practitioners; interest in AI and GTM; comfortable with ambiguity; persistent, organized, positive.
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2mo
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Founding Designer
San Francisco, California, United States
OnsiteFull Time
Runbook
Runbook: Building an AI operations platform for the physical economy.
3+ YOE3+ years in product design; track record delivering large, ambiguous projects; strong product instincts; seeks ownership on an early team.
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2mo
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Founding Engineer
Palo Alto or California
$140k-$200k/yr OnsiteFull Time
TrueMeter
TrueMeter: AI-powered platform for commercial energy savings and bill management.
Experienced full-stack engineer with production experience in TypeScript/React/Next.js, backend APIs and Postgres, desktop/web (Electron or Tauri), LLM features in production, CI/CD, testing, observability, and customer-facing product work.
TypeScript, React, Next.js, Postgres, Electron, Tauri, Claude Code, Codex, CI/CD, GitHub, LLM
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3mo
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Founding Engineer
San Francisco, California, United States
HybridFull Time
Double Blind Bio
Double Blind Bio: Develops AI agents automating administrative clinical trial workflows.
Strong full-stack engineering with deep AI/ML expertise; evals, observability, production LLMs; product-minded; healthcare familiarity; fast-paced, autonomous work.
LangSmith, Braintrust, Weights & Biases, Honeyhive
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2w
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Founding Engineer
San Francisco or Lausanne
HybridFull Time
Compresr
Compresr: Provides an API that compresses LLM context to reduce costs.
Experienced full-stack engineer with strong backend fundamentals, concurrency/distributed systems, AWS production deployment, Python and light frontend skills, and excellent communication.
Python, FastAPI, PostgreSQL, Supabase, Redis, AWS, Next.js, React, TypeScript, GitHub, Docker, Sentry, GitHub Actions, Claude Code
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2mo
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Founding Engineer - Software
San Francisco or United States
$200k-$350k/yr RemoteFull Time
uRun
uRun: Infrastructure cloud for interactive, stateful AI inference.
7+ YOE7+ years backend experience; proficient in TypeScript/Node.js or Python/Go; API design, distributed systems; cloud, containers, performance, and concurrency; real-time/latency-sensitive systems.
TypeScript, Node.js, Python, Go, WebRTC, WebSockets, Kubernetes, Observability, Cloud, Containers
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3w
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Infinite.dev - Founding Engineer
San Francisco, California, United States
OnsiteFull Time
YieldNest
YieldNest: Liquid restaking protocol for risk-adjusted DeFi yields.
2+ YOE2–5+ years software engineering experience; proficiency in two of Next.js, TypeScript, C#, Go, or Python; experience with event-driven architectures, full-stack ownership, and AI-assisted development tools.
Next.js, TypeScript, C#, Go, Python, Cursor, windsurf
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