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

Founding Engineer

Fragment

Company Highlights The Team: Our CEO previously led and scaled three of Zoom's products past $300M in revenue, and our CTO is an ex‑AI researcher who has spent his entire career in enterprise AI, leading engineering teams from seed through Series C. The broader team includes repeat VC‑backed founders, Caltech PhDs, former quants, chess masters, Six Sigma Master Black Belts, and one very enthusiastic Bonsai grower. Market Demand : We have several Fortune 500 customers, mid‑8‑figures in active pipeline, and customers actively championing us to their networks. Our marketing and CAC to get here has been $0. Hypergrowth: 30x revenue growth in the first half of this year, with the majority of our pipeline coming from customer references. Product: We pride ourselves on our depth of our experience building agents, and on our continued diligence in leveraging the latest technology. We hold a high bar of excellence that starts with the founding team. Background Deploying truly impactful AI Agents today requires teams of forward‑deployed engineers, months of ontology design, hundreds of ad‑hoc integrations, and thousands of lines of glue code. It’s slow, expensive, brittle, and impossible to scale. Fragment eliminates all of that. We’ve built a platform where: Ontology Agents autonomously construct the context layer, unifying structured + unstructured data, capturing tribal knowledge, and composing it all into a real-time ontology of the business. Self‑assembling Process Agents automate workflows that would normally be manually and tediously handled by BPOs. Our first suite of agentic workflows, which drove our early traction, targets procurement. Our product sits in the #1 budget priority for traditional enterprises right now: AI that streamlines labor, and actually works in production. What You'll Do You will design and own systems that don’t exist yet -- the foundational architecture for AI Agents operating over complex enterprise data. For example: Build a distributed agent pipeline that processes tens of millions of data points with deterministic, auditable, and multi‑tenant‑safe behavior Define and develop an automation editor that takes a visual-text hybrid approach to workflow development. Enable dynamic, configurable design that autonomously adapts to the processes of a customer. Engineer graph traversal + indexing systems enabling fast, lossless reasoning over our Unified Data Interface (UDI) and arbitrary data systems. Define the core framework for self‑assembling agents that compose and execute workflows autonomously -- safely, predictably, and with full traceability This is not a “feature team” role. This is foundational engineering , shaping the platform that every agent and every enterprise workflow will rely on. Who You Are We’re looking for a high‑slope generalist with 2‑7 years of experience who gets restless when they're not building things that matter. You might describe yourself as someone who: Learns ridiculously fast Thrives in ambiguity Thinks in systems, not tickets Ships high quality work quickly Gets excited by messy enterprise data and hard problems Wants to own architecture, product, and customer impact Has seen high quality production code across the stack Interested? Reach out even if you’re not sure you’re a perfect fit. High‑slope engineers rarely fit cleanly on paper. #J-18808-Ljbffr

Vacancy posted 2 days ago
Similar jobs that could be interesting for youBased on the Founding Engineer in San Francisco, CA vacancy
  •  ...A pioneering hardware company in San Francisco seeks a founding engineer to lead the development of an advanced edge computing device. You will own the entire hardware product lifecycle, focusing on rugged designs and seamless data transmission. Ideal candidates have over... 
    Suggested

    Flynavi

    San Francisco, CA
    19 hours ago
  • Join Hire Hangar and work with fast-growing global companies while building a long-term career. 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... 
    Suggested
    Contract work

    Hire Hangar

    San Francisco, CA
    17 hours 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... 
    Suggested
    Remote work
    Worldwide

    Dragonfly

    San Francisco, CA
    3 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... 
    Suggested
    Relocation

    Dryft

    San Francisco, CA
    4 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... 
    Suggested
    Relocation

    TruNorth LTD

    San Francisco, CA
    2 days 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
    2 days 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
    5 days ago
  •  ...Founding Software Engineer | AI Agents | San Francisco or London Location: San Francisco, CA or London, UK (London-based candidates must be willing to relocate to San Francisco in 2026) This is a genuine Founding Engineer opportunity to join an Andreessen Horowitz-backed... 
    Relocation
    Flexible hours

    TruNorth

    San Francisco, CA
    1 hour ago
  • $200k - $250k

     ...Overview As a Founding Engineer, you'll architect and build the core AI agents and infrastructure that power precision outbound at scale — then make them accessible through beautiful, intuitive interfaces. You'll work directly with customers, shape product direction, and... 
    Work at office

    Cardinal Services Inc of Indiana

    San Francisco, CA
    1 hour ago
  •  ...currently have a desktop IDE that’s loved by tens of thousands of engineers, we’re looking to scale out by building a mobile app, cloud...  ...if: You’ve worked at a startup before (bonus points if you’ve founded one) You’re using AI tools actively You take ownership of your... 
    Work at office

    Superset.ai

    San Francisco, CA
    1 hour ago
  • $170k - $250k

     ...Healthcare AI · Founding Team · San Francisco $170K – $250K + 0.5–1.5% Equity SF · Remote-Flexible $5M Raised · Tier-1 VCs 2–4 Founding Engineers No Visa Sponsorship AI Agents Replacing Manual Healthcare Operations A well-funded, early-stage AI startup founded in 2024... 
    Internship
    Remote work
    Visa sponsorship
    Relocation package
    Flexible hours

    Aionia Group

    San Francisco, CA
    1 hour ago
  • $200k - $300k

     ...agents resolve 3-way match failures, change orders, duplicate invoices, and more, end to end. No rip-and-replace. We're hiring Founding Engineers to help build the systems that make this possible. Our founding team comes from enterprise AI and manufacturing and has been... 

    Fragment Data Technologies

    San Francisco, CA
    1 hour ago
  •  ...Candidate Data Infrastructure - "Senior SWE" and "Sr. Software Engineer" are the same thing, but keyword search doesn't know that. Build...  ...jobs." "Own green‑field systems, ship daily, and receive founding‑level equity in a pre‑seed startup backed by top investors." "Relocate... 
    Full time
    Work experience placement
    H1b
    Live in
    Remote work
    Relocation
    Visa sponsorship
    Flexible hours
    Day shift

    Worldwide Placement

    San Francisco, CA
    1 hour ago
  • $150k - $250k

     ...tl;dr: This is a 1 of 1 role. We're looking for a founding engineer to work alongside a Thiel Fellow founder as literally employee #1. Great compensation, equity, and perks. About Empathic “…but I tell you all today, I would rather die a man than live for all eternity... 
    Work at office
    Immediate start
    Night shift

    Empathic

    San Francisco, CA
    19 hours ago
  • $150k - $250k

     ...AgentMail is building the identity and communication infrastructure for AI agents, starting with email. We are looking for a Founding Engineer with backend and infra focus to architect systems for agents as the end users. Responsibilities Design APIs that are intuitive... 
    Work experience placement
    Internship

    AgentMail (YC S25)

    San Francisco, CA
    2 days ago
  • £60k - £120k per year

     ...London Employment Type Full time Location Type On-site Department Engineering Compensation £60K – £120K • Offers Equity Why we're hiring...  ...like? We think 9am‑6pm will bring a great cadence to work. As a Founding Engineer there will definitely be times you need to pick up... 
    Full time
    Work at office
    Remote work
    Work from home
    Relocation
    Visa sponsorship
    Work visa
    Relocation package
    Free visa
    Skilled worker visa
    Flexible hours

    Crane Venture Partners

    San Francisco, CA
    2 days ago
  •  ...About the Role We're looking for founding Machine Learning Engineers (MLEs) to own and improve our core action models end-to-end— the intelligence that powers Composite's proactive automation platform. You'll work at the intersection of LLM inference, browser understanding... 

    Icehouseventures

    San Francisco, CA
    4 days ago
  •  ...Builders Build TierZero's mission is to accelerate software engineering. Today, engineers spend 50-70% of their time not building -...  ...market waiting to be reclaimed. Highlights Team : Our founding team is made up of pioneers in AI agents - staff and principal... 
    Work at office
    3 days per week

    Embedding VC

    San Francisco, CA
    1 day ago
  •  ...tens of thousands of members and have raised over $10M from some of the leading VC firms in Silicon Valley. Why we need you As a founding engineer, you’ll be responsible for building the engine that help clinicians practice care at the top of their licensure. From patient-... 
    Full time
    Work at office
    Relocation

    Dormont Manufacturing Company

    San Francisco, CA
    20 hours ago
  •  ...Fonzi puts founding-level engineers in front of some of the most well-backed AI startups in NYC and San Francisco. 30+ pre‑vetted companies review your profile and request interviews, so you don't have to apply to each one individually. The companies on Fonzi are building... 

    Fonzi AI

    San Francisco, CA
    19 hours ago
  • $200k

     ...of products for private market investing. As a Senior Software Engineer on Meridian, you’ll own the technical design and delivery of major...  ...sequencing trade‑offs through launch and iteration. This is a founding engineer role on a zero‑to‑one product with meaningful... 
    Work at office
    2 days per week

    AngelList Venture

    San Francisco, CA
    2 days ago
  •  ...platforms. Define Technical Strategy and Culture: You will collaborate closely with the founding team to shape technical strategies, influence product development, and establish our engineering culture and best practices. Proactive Problem Solving: You will drive success by... 

    Unbound

    San Francisco, CA
    2 days ago
  • $180k

     ...People Culture Talent. We're excited to help connect talented professionals with this exceptional team! The Role We're hiring a Founding Engineer to join an early stage company building software and data infrastructure for organizations operating in a highly regulated,... 
    Work experience placement

    People Culture Talent

    San Francisco, CA
    4 days ago
  • $120k - $180k

     ...Founding Engineer – Staff/Senior Location: San Francisco, CA Type: Full-time, In-person Flowtel is building the next-generation operating system for hospitality, powered by modern AI agents that can handle everything from booking to room service. We just launched, secured... 
    Full time

    Flowtel

    San Francisco, CA
    2 days ago
  •  ...We’re looking for exceptional founding engineers to build the consumer security layer for web3. Working at Pocket Universe protects people from fraudulent transactions designed to steal blockchain assets. Our mission is to push the status quo on security and UX such that... 
    Full time
    Contract work
    Relocation

    Pocket Universe

    San Francisco, CA
    2 days ago
  •  ...company from scratch! About Our Team Our team is a group of five engineers, embodying a ‘small but mighty’ spirit. We are defined by our...  ...’ve done this before (we love former founders + early stage founding engineers! All great talent is welcome, of course). Who You Are... 
    Contract work

    Untether Labs

    San Francisco, CA
    2 days ago
  • $150k - $250k

     ...Founding Engineer Opportunity Location: San Francisco, CA Type: Full-time, on-site We are seeing a surge in market demand as agents become real first-class citizens of the internet, and we are aggressively hiring in order to keep up. We're coming up with solutions... 
    Full time

    Agentmail (yc s25)

    San Francisco, CA
    1 day ago
  • $180k - $280k

     ...Salary: USD180000 - USD280000 per annum + PTO + Benefits + 401(K) + Equity Founding Senior Software Engineer $180,000 - $280,000 + 1-2% Equity + 401(k) + Benefits + Flexible PTO San Francisco, CA - On-site (5 days/week) Are you a Senior Software Engineer with full stack... 
    Relocation
    Flexible hours

    Rise Technical Recruitment

    San Francisco, CA
    2 days ago
  • $175k - $375k

     ...Founding Engineer - build the platform that lets enterprises actually deploy AI agents Are you a product-minded engineer who ships fast and owns outcomes end-to-end? Have you been the person who takes something from concept to launch without waiting for a spec? Do you... 
    H1b
    Work at office
    Visa sponsorship

    Venture Up Inc

    San Francisco, CA
    5 days ago
  • $175k - $225k

     ...About the Role Join a fast-moving, early-stage consumer AI startup as a Founding Engineer — a rare, high-impact position working directly alongside the founder. This is a true 1-of-1 opportunity to shape both the product and engineering culture from the ground up. The... 
    Remote work
    Visa sponsorship

    CLERA

    San Francisco, CA
    19 hours ago

Do you want to receive more vacancies?

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