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386 founding engineer jobs at 230 companies in United States

1mo
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Founding Engineer
New York City, New York, United States
$125k-$225k/yr OnsiteFull Time
Clusia
Clusia: AI-native assurance firm completing audits and independent testing for fintechs, banks, and other companies that move money.
Hands-on experience with LLMs and production AI, full-stack product engineering, cloud infrastructure, deployment and observability, and strong product-minded execution.
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2mo
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Founding Engineer
San Francisco, California, United States
$175k-$225k/yr OnsiteFull Time
Clera
Clera: AI-powered talent agent matching candidates to 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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1w
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Founding Engineer
New York City, New York, United States
$150k-$300k/yr OnsiteFull Time
Asymptote Labs
Asymptote Labs: AI security giving enterprises telemetry, detection, and response controls for agent activity.
5+ YOE5+ years building production software, infrastructure, developer tools, data platforms, or distributed systems; strong backend, distributed systems, databases, APIs, architecture, and product engineering skills.
Beacon, MCP, eBPF
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2w
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Founding Engineer
San Francisco, California, United States
OnsiteFull Time
Origamics
Origamics: Builds physics-informed AI models that generate fabrication-ready circuit boards for hardware engineers.
Experience building systems from zero to one, making storage, compute, architecture, build-versus-buy, and maintenance trade-offs, with interest or experience in agentic systems and foundational models.
CI, agentic systems, dedicated containers, multi-agent orchestration
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Founding Engineer
Lehi, Utah, United States
HybridFull Time
Workstream
Workstream: Workstream is a private software providing hiring, HR, payroll, and workforce tools for hourly, multi-location restaurants.
Production experience building and operating AI agents or agentic workflows, with strong judgment across APIs, integrations, permissions, observability, evaluations, and customer-facing implementation.
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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 drug-discovery platform providing web and API access to computational biology tools for biotech and biopharma scientists.
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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Founding Engineer
San Francisco, California, United States
$120k-$160k/yr OnsiteFull Time
Aurorin CAD
Aurorin CAD: AI-native CAD software for mechanical engineers and hardware teams, built to speed up computer-aided design.
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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Founding Engineer
United States or California
RemoteFull Time
Athena
Athena: Private San Francis startup studio that-founds, funds, and scales AI-native and data-driven software companies.
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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Founding Engineer
San Francisco or Lausanne
HybridFull Time
Compresr
Compresr: LLM context compression for better accuracy
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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2w
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Founding Engineer
San Francisco, California, United States
$140k-$220k/yr OnsiteFull Time
Syntro
Syntro: Private AI procurement platform helping hardware manufacturers discover, select, and manage component suppliers.
Exceptional engineer with zero-to-one complex systems experience, full-stack ability, strong judgment, and expertise in reliability, data correctness, observability, and ambiguous problem-solving.
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Founding Engineer
San Francisco, California, United States
HybridFull Time
Double Blind Bio
Double Blind Bio: Private health-tech startup building AI agents that automate clinical-trial workflows for research sites and life-science sponsors.
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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Founding Engineer
Lehi, Utah, United States
HybridFull Time
Workstream
Workstream: Private software providing hiring, HR, payroll, and workforce tools for hourly, multi-location restaurants.
Production experience building and operating AI agents or agentic workflows, with strong engineering judgment across models, APIs, integrations, permissions, observability, evaluations, and customer-facing implementation.
AI agents, agentic workflows, APIs
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Founding Engineer
New York City, New York, United States
$170k-$200k/yr OnsiteFull Time
Alden Labs
Alden Labs: Private AI healthcare software serving home care agencies with agents that automate coordination, scheduling, and communications.
3+ YOEFull-stack software engineer with 3+ years, skilled in React/NextJS, Express, PostgreSQL; strong ownership; healthcare and AI interest; able to ship features end-to-end.
React, NextJS, Express, PostgreSQL
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Founding Engineer
New York City, New York, United States
OnsiteFull Time
Andreessen Horowitz
Andreessen Horowitz: Private venture capital firm investing in startups from seed through growth stages and helping founders build companies.
3+ YOE3+ years of engineering experience, Python and TypeScript proficiency preferred, strong data modeling fundamentals, fast product delivery, sound judgment with coding agents, and ability to learn from feedback.
Python, TypeScript
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2w
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Founding Engineer
United States
RemoteFull Time
Vim
Vim: Vim is a private healthcare technology platform connecting payers, providers, EHRs, and digital health developers within clinical workflows.
5+ YOE5+ years of engineering experience, early-stage startup experience, effective AI use, production agent-system experience, and full-stack skills with strong data modeling, schema, and pipeline expertise.
AI, FHIR, EHR, wearables
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2mo
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Founding Engineer
Palo Alto or California
$140k-$200k/yr OnsiteFull Time
Pear VC
Pear VC: Private seed-stage venture capital firm investing in pre-seed and seed technology companies and supporting founders.
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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Founding Engineer - LLM Infra & Platform
San Francisco, California, United States
$130k-$220k/yr OnsiteFull Time
Pax Historia
Pax Historia: AI-powered alternate-history game platform serving players and creators who build and share interactive scenarios.
Strong software engineering fundamentals, fast learning ability, attention to detail, data orientation, and rigorous verification mindset. Experience with this exact role is not required.
LLM, AI
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Founding Engineer, Open Source
New York, New York, United States
$225k-$300k/yr OnsiteFull Time
Datalab
Datalab: Document intelligence research lab that trains models and provides enterprise document-processing infrastructure for AI labs and businesses.
5+ YOE5+ years building production software, strong open-source contributions, fluent in Python, experience creating technical content and engaging developer communities.
Python, GitHub, Discord, X, Reddit, marker, surya, chandra, lift, SDK, API, YouTube, Twitch, OCR
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2mo
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Senior / Staff Founding Engineer
New York City, New York, United States
$250k-$320k/yr OnsiteFull Time
Rovi Health
Rovi Health: AI healthcare concierge and virtual clinic helping employees in self-funded health plans access better-value care.
8+ YOE8+ years building software with deep experience in Python, React, and TypeScript; ownership of products end-to-end; production AI/ML and LLM/agent experience; systems and scale experience; healthcare/fintech a plus.
Python, React, TypeScript, LLM
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3mo
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Founding AI Engineer
San Francisco, California, United States
$120k-$180k/yr OnsiteFull Time
Bild AI
Bild AI: AI construction software that reads blueprints and estimates material costs for builders.
Applied CV/ML experience; 0-to-1 builder; growth mindset; strong communication.
Computer Vision, Large Language Models, Multimodal AI, Production ML
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