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474 founding jobs at 247 companies in California

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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3w
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Founding Engineer
United States or California
RemoteFull Time
Checksum
Checksum: AI platform for autonomous and continuous software quality testing
Experienced full‑stack engineer with product instincts, proven shipped products, user research experience, and comfort working on AI systems in early‑stage environments.
LLMs, GitHub
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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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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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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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3w
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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
San Francisco, California, United States
$150k-$220k/yr OnsiteFull Time
Clera
Clera: AI talent agent matching professionals with high-growth startup roles
1+ YOE1+ years shipping software to production; experience with APIs, distributed systems, microservices, data pipelines, cloud (AWS or GCP) and Linux; familiarity with LLMs/AI agents and knowledge graphs is a plus.
APIs, LLMs, AWS, GCP, Linux
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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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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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