Sign up to access all features of our service.
  • Job search
  • Favorites
  • Create a CV
    New
  • Salaries
  • Subscriptions

Founding Engineer

Fabrion

Founding Engineer (Full Stack)

Location: San Francisco Bay Area Type: Full-Time Compensation: Competitive salary + meaningful equity (founding tier)

Backed by 8VC, we're building a world-class team to tackle one of the industry's most critical infrastructure problems.

About the Role

We're hiring a founding full stack engineer to help architect and build the platform from day one. This is a unique opportunity to a significant portion of the tech stack and grow into a leadership role with considerable upside in equity.

You'll be working on infrastructure that combines large-scale data systems with AI-native agents. This is a highly autonomous, high-leverage role with ownership over core architecture and early team culture.

You'll be writing production code across backend and frontend, defining interfaces between components, shaping devops and data infrastructure, and helping translate abstract concepts into working systems. If you're someone who prefers fast feedback, direct impact, and long-term upside — this is for you.

Responsibilities
  • Architect and build scalable APIs, backend services, and web application components
  • Contribute across the stack: data pipelines, agents, web UIs, deployment systems
  • Design and implement internal tooling, testing frameworks, and CI/CD pipelines
  • Collaborate closely with product and design to prototype and ship features quickly
  • Help define engineering processes, contribute to documentation, and grow the early team
Our Stack

An ability to learn and grasp new technologies quickly trumps knowing the entire tech stack — you should be comfortable learning and adapting in a fast-moving environment. The following represents the types of technologies you will be working with:

Languages: TypeScript (Node.js), Python (FastAPI) Frontend: React, Next.js, Tailwind, shadcn/ui Backend: Postgres, DuckDB, GraphQL (Hasura), Kafka, REST Cloud/Infra: AWS, Docker, GitHub Actions, ArgoCD, Kubernetes (basic) AI/Agents: LangChain, LangGraph, OpenAI, Anthropic, LLaMA, Pinecone, Qdrant Governance: Keycloak, Open Policy Agent (OPA), OpenTelemetry, Slack integrations Visualization: Vega, Flourish, React ReChart Connectors: ERP, PLM, Excel, Email, Web APIs

What We're Looking For

Experience:

  • 5+ years as a full stack or backend engineer
  • Experience owning and delivering production systems end-to-end
  • Prior experience with modern frontend frameworks (React, Next.js)
  • Familiarity with building APIs, databases, cloud infrastructure, or deployment workflows at scale
  • Comfortable working in early-stage startups or autonomous roles, prior experience as a founder, founding engineer, or a 0-1 pre-seed startup is a big plus

Mindset:

  • Comfortable with ambiguity, eager to prototype and iterate quickly
  • Strong sense of ownership — prefers to build systems rather than wait for tickets
  • Enjoys thinking about architecture, performance, and tradeoffs at every level
  • Clear communicator and pragmatic team player
  • Values equity and impact over prestige or hierarchy
  • Prior startup or founding team experience

Bonus:

  • Contributions to open-source or internal tools with impact
  • Interest in data systems, agent workflows, or LLM orchestration

Why Join:

  • True ownership — early equity and influence over product and technical direction
  • Mission-driven team solving complex data and AI problems with real-world impact
  • Strong engineering culture focused on velocity, clarity, and long-term thinking
  • Learning curve across AI, data infra, agents, and enterprise-scale platforms
  • Early access to cutting-edge AI workflows and deployment patterns

If you want to build systems that learn, act, and evolve — with the autonomy to shape the stack and the team — we'd love to hear from you.

Vacancy posted 3 days ago
Similar jobs that could be interesting for youBased on the Founding Engineer in San Francisco, CA vacancy
  • Job Title: Founding Systems Engineer (Performance) Location | On-Site — San Francisco, CA Time Zone | PST Role Overview We are seeking a Founding Systems Engineer to join the earliest technical team at a fast-moving AI video infrastructure startup. The company's first... 
    Suggested

    Hire Hangar

    San Francisco, CA
    1 day ago
  •  ...A pioneering robotics company is seeking a Founding Mechanical Engineer in San Francisco, CA. You will design and develop robotic arms for microgravity environments, leading all aspects from concept to flight-ready hardware. Essential qualifications include a Bachelor... 
    Suggested

    General Astronautics

    San Francisco, CA
    5 days ago
  • Mentum (Acquired by Nuvocargo) is seeking a Founding Engineer in San Francisco, CA to build AI-driven solutions for supply chain automation. This role offers a unique opportunity to shape the future of the product and tackle complex challenges in AI. You will be responsible... 
    Suggested

    Mentum (Acquired by Nuvocargo)

    San Francisco, CA
    5 days ago
  • SupportFinity™ in San Francisco is looking for a Founding AI Systems Engineer to build core systems for a leading AI companion in language learning. You will develop AI architecture that ensures personalized conversations for millions, addressing challenges like memory... 
    Suggested

    SupportFinity™

    San Francisco, CA
    5 days ago
  • UMATR is seeking a Founding Engineer in San Francisco, California to build innovative infrastructure for autonomous AI systems. You will write production Rust code and own the technical direction of the project, while mentoring the first engineers. Strong experience in... 
    Suggested

    UMATR

    San Francisco, CA
    1 day ago
  • $180k - $250k

    We’re hiring a Founding AI Systems Engineer to build the intelligence layer for the leading AI companion for language learning. You’ll own the core AI systems powering personalized conversations for millions of users. Language learning shouldn’t feel like an app — it... 

    SupportFinity™

    San Francisco, CA
    5 days ago
  • $120k - $200k

    Red Cedar Ventures seeks a Founding Engineer to build the core intelligence behind AutoSitu’s review agents. This role offers a unique opportunity to shape product direction and work closely with founders. You will develop multimodal systems that enhance construction documentation... 

    Red Cedar Ventures

    San Francisco, CA
    1 day ago
  • $180k - $250k

    A leading AI language learning platform is hiring a Founding AI Systems Engineer in San Francisco. You will lead the architecture of AI systems that enhance language learning through personalized dialogue. The role requires a systems-thinking background and experience... 

    Pingo AI

    San Francisco, CA
    4 days ago
  • Digital Waffle, a hyper-growth AI healthcare startup in San Francisco, is searching for a Founding Engineer to help build transformative AI technology for clinical trials. You will design and scale production AI systems across healthcare environments and work closely with... 

    Digital Waffle

    San Francisco, CA
    5 days ago
  • A technology company in San Francisco is seeking a Founding Fullstack Engineer to build scalable systems that automate complex decisions in manufacturing. Ideal candidates will have experience with data-driven agents, strong product sense, and the ability to ship production... 
    Relocation

    Dryft

    San Francisco, CA
    3 days ago
  •  ...companies within our portfolio by connecting them with talented potential candidates. One of our portfolio companies is hiring a Founding Engineer to lead development on a consumer crypto app that’s already live with meaningful traction. This is not a listing for an... 
    Remote work
    Worldwide

    Dragonfly

    San Francisco, CA
    2 days ago
  • TruNorth LTD is seeking a Founding Software Engineer to join its San Francisco team or London-based candidates willing to relocate in 2026. This role focuses on building enterprise-grade AI agents for Fortune 500 clientele. The ideal candidate will have a passion for early... 
    Relocation

    TruNorth LTD

    San Francisco, CA
    1 day ago
  • SupportFinity™ is seeking a Founding Engineer to lead development of a consumer crypto app, joining as the first engineering hire with a growing user base. You will own core features and drive architecture across the stack. Work across the core app, SDKs, and integrations... 

    SupportFinity™

    San Francisco, CA
    1 day ago
  • Trajectory, based in San Francisco, is seeking a Founding Generalist Engineer to craft the product experience for continual learning. The role involves owning the SDK and API surfaces while working directly with founders and industry-leading partners. Ideal candidates... 

    Trajectory

    San Francisco, CA
    4 days ago
  • $150k - $300k

     ...I’m partnering with a well-funded AI startup that’s redefining how enterprise integrations are built. They’re looking for a Founding Engineer (2-5 years’ experience) who thrives in high-ownership environments and wants to build core infrastructure from scratch. You’ll... 
    Visa sponsorship

    Alpha Associates Recruitment

    San Francisco, CA
    4 days ago
  •  ...This is a foundational role: Sim is hiring our first GTM Engineer to build the company's go-to-market and RevOps infrastructure from...  ..., custom internal tools, and data-driven outbound campaigns Found and scale: Set the technical standard and shape the DNA of Sim... 
    Full time
    Work at office
    Immediate start
    Visa sponsorship
    Relocation package

    SIM USA

    San Francisco, CA
    4 days ago
  •  ...hand‑holding. No waiting for specs. You need to be a full‑stack engineer, an AI engineer, and a product engineer in one person. Being a...  ...outsized impact this role will have A seat at the table. This is a founding role. You'll shape the product and the company We're building... 

    Dataleap (YC S24)

    San Francisco, CA
    5 days ago
  • $120k - $200k

     ...housing, infrastructure, and communities can get built. Compensation: $120 K – $200 K, 1.00% – 2.00% equity. About The Role As a Founding Engineer, you will work directly with the founders on difficult applied‑AI and distributed‑systems problems that sit at the... 
    For contractors
    Local area

    Red Cedar Ventures

    San Francisco, CA
    4 days ago
  •  ...Developer We are looking for a highly skilled AI Developer to join us on our mission to build the future of search. As the founding engineer, you'll shape the foundation of a high-impact technology with a scrappy but rigorous, and a product-led growth mentality. You... 

    Zeroentropy (yc W25)

    San Francisco, CA
    3 days ago
  • $130k - $160k

     ...Job Description Founding Engineer (AI / Full Stack) San Francisco, USA (Relocation + Visa Sponsorship) $130,000 - $160,000 + Equity Revive Recruitment are proud to be partnered with an early-stage AI / HR Tech start-up backed by pre-seed funding, building... 
    Work at office
    Relocation
    Visa sponsorship

    Revive IT Recruitment

    San Francisco, CA
    2 days ago
  •  ...from top tier venture capital firms who were early investors in companies like Palantir, Hermeus, and OpenGov. We’re hiring a founding engineer who seeks early-stage ownership and is eager to work directly with service members on problems that matter. In this role, you’... 
    Work at office

    Paratus LLC

    San Francisco, CA
    5 days ago
  • $350k

     ...conversations consistent and personalized across all channels. Reverse engineering legacy healthcare systems that don't have public APIs to...  ...who desperately need them. We're looking for exceptional founding engineers to help us realize this ambition. If you're an... 
    Contract work
    Night shift

    Alleviate Health Inc

    San Francisco, CA
    4 days ago
  • $170k - $250k

     ...Job Description Founding Engineer (AI / Product) San Francisco, USA (Remote-Flexible with SF Presence) $170,000 - $250,000 + Equity Revive Recruitment are proud to be partnered with a stealth-mode AI start-up transforming how healthcare providers in the... 
    Immediate start
    Remote work
    Relocation package
    Flexible hours

    Revive IT Recruitment

    San Francisco, CA
    4 days ago
  • $145k - $175k

     ...Founding GTM Engineer Title of Role: Founding GTM Engineer Location: San Francisco, onsite Company Stage of Funding: Venture-Backed - AI, B2B, Software Development, Enterprise Office Type: Onsite Salary: $145K-$175K Company Description We're... 
    Work at office

    Recruiting from Scratch

    San Francisco, CA
    3 days ago
  •  ...partnering with an early‑stage AI startup building agentic software products from the ground up. They’re looking for a Founding Full‑Stack Engineer to join a small, high‑calibre team working directly with the founders to shape both the product and technical direction... 

    Berkley Hunt

    San Francisco, CA
    5 days ago
  •  ...Founding Engineer (Frontend) We're looking for frontend engineers. We prioritize learning over all. You must show a clear trajectory of growth. You will be more than a founding engineer; you'll be deeply integrated into the founding team, and help make strategic decisions... 
    Work experience placement

    RST Recruitment

    San Francisco, CA
    3 days ago
  • $300k

     ...A hyper-growth AI healthcare startup is hiring a Founding Engineer to help build AI systems tackling one of the biggest challenges in modern medicine. Backed by Andreessen Horowitz and some of the most respected investors in healthcare and AI, the business is transforming... 

    Digital Waffle

    San Francisco, CA
    3 days ago
  •  ...technical genius. He trained the first-ever image editing AI in the world. Before Y/n, I was the founding designer at Substack. We're looking for a founding full-stack engineer to own most of the app surface and our personalized recommendations infrastructure. This is a... 
    Relocation

    Can of Soup

    San Francisco, CA
    1 day ago
  •  ...We’re looking for a founding engineer to build the system that runs industrial commerce. Avent is turning the global supply chain into a machine-to-machine system where products are quoted, sourced, and fulfilled at software speed. This is not about building features.... 
    Relocation

    Avent Industrial Inc

    San Francisco, CA
    1 day ago
  •  ...Founding Engineer San Francisco, CA Role At Camfer, our engineers are rethinking how people will interact with CAD tools and actively building out that future. Based on one's interests, and the current needs of the team, engineers build products, systems, models... 
    Work at office
    Flexible hours

    Camfer

    San Francisco, CA
    3 days ago

Do you want to receive more vacancies?

Subscribe and receive similar vacancies to Founding Engineer. Be the first to apply!