Founding Engineer Jobs in San Francisco, CA

We are redefining the future of voice-based interactions by building highly realistic AI-powered voice agents that enhance customer support order intake and lead qualification across industries. Backed by top investors our AI is already handling millions of calls for leading companies across sales s...

Were looking for a Founding AI Engineer with a hacker spirit someone passionate about building production-ready AI agents and workflows from the ground up. You will have end-to-end ownership shaping both our technical foundation and product direction. The core challenge: building a simulated environ...

Were seeking a product-minded Full-Stack Engineer who excels at the intersection of product engineering and experimentation. Youll be joining a small highly talented team still in the early days of building and scaling where your contributions will extend far beyond code. Youll actively shape techni...

Founding Engineer Full Stack (Applied AI) San Francisco CA Full-time On-site $160K - $260K Equity (0.5% - 1.5%) About the Role We are redefining the future of voice-based interactions by building highly realistic AI-powered voice agents that enhance customer support order intake and lead qualifi...

Founding Frontend Engineer (Staff) Job Summary Variant is seeking a Founding Frontend Engineer to own and shape the frontend of our platform. This is a Senior II / Staff-level role based in San Francisco CA. We are well-capitalized backed by top investors and focused on building software that blends...

AI/LLM Systems Software Engineer Location: San Francisco CA Work Type: In-person Employment: Full-time Experience Required: 2 years Salary Range: $175000 - $225000 per year Visa Sponsorship: Not available The Role As a founding engineer youll design and build core systems from the ground up working...

Founding AI Engineer Growth Systems San Francisco CA (On-site Hayes Valley) Full-Time $180K - $220K Equity Visa sponsorship relocation available 5 - 12 years of full-stack experience About the Role Were building the future of growth marketing where companies pay for outcomes not tools. Our pla...

DescriptionLocation: San Francisco Bay Area Employment Type: Full-time Work Arrangement: HybridAbout the RoleOur client is building the first browser-native AI agents for financial advisory. Their agents can see whats on-screen understand context and perform compliant actions and multi-step workflow...

DescriptionFounding ML/Data Science EngineerLocation: San Francisco CA (Hybrid) Employment Type: Full-timeAbout the RoleOur client is building the revenue execution system for B2B enterprises tackling the underpenetrated space of post-sales enablement. They are combining LLMs with structured custome...

Founding ML EngineerFull-time On-site San Francisco CA$175K $250K Equity (1 2%)About the RoleWere looking for a Founding Machine Learning Engineer to build and scale the real-time voice model infrastructure that powers emotionally intelligent AI voice systems. In this role youll design ultra-lo...

Founding Engineer (Design & Frontend)Full-time On-site San Francisco CACompensation: $140K $250K 0.5%1.75% EquityAbout the RoleWere looking for a Founding Frontend Engineer with strong product taste and a track record of shipping intuitive polished interfaces. Youll be joining at the 01 stage he...

Founding EngineerFull-time On-site San Francisco CAAbout this roleWere looking for a Founding Engineer to be a full-stack builder working on scalable systems that test and evaluate conversational AI. This is a high-ownership role where youll design infrastructure build features end-to-end and work...

Founding Full-Stack Engineer San Francisco US Citizens Only Onsite Our client is building the end-to-end testing platform for voice text AI. Backed by Y Combinator Floodgate and top angels they are already working with Fortune 500s and the hottest voice AI startups in Silicon Valley. With $4M in...

Founding Backend Engineer- Generative AI Media San Francisco (Onsite 5 days/week) Salary Generous Equity US Citizens / Permanent Residents only (No visa sponsorship) The Opportunity Were partnering with a stealth AI video startup in San Francisco thats reimagining the future of media. Backed by t...

Founding Forward Deployed Engineer / Technical Solutions EngineerAbout the RoleAs a Founding Forward Deployed Engineer youll own the success of enterprise customers as they deploy our platform at scale. This is a hands-on customer-facing role where technical skill adaptability and communication are...