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
- Peregrine Technologies is seeking a founding member of the Business Technologies team in San Francisco to design scalable internal infrastructure, not just modify existing systems. You’ll be the second hire, partnering with the TPM Lead to define architecture across identity...Suggested
- Peregrine Technologies in San Francisco is seeking a founding member of the Business Technologies team. You will design internal infrastructure... ...IT, Security, and business teams. The role emphasizes an engineering-first approach, IaC, and cross-functional collaboration to...Suggested
- Peregrine Technologies is seeking a founding member for its Business Technologies team in San Francisco. You will help design internal infrastructure, automate IT workflows, and scale platforms across identity, SaaS, and cloud environments. You will partner with IT, Security...Suggested
- Hivemind is building a social AI that talks to many people at once, with one-on-one conversations. We are seeking founding members of technical staff to co-own the foundation from day zero and shape the team as it grows. You will define technical standards, build core...Suggested
- ...science and manufacturing that isn't possible on Earth, and we're doing it without humans in the loop. We're looking for a Founding Mechanical Engineer to own the design and development of our robotic arm from concept through flight-ready hardware. This is a high-...SuggestedPermanent employment
$250k - $380k
Base pay range $250-380k Needl Owner - Helping tech startups scale Founding Hardware Engineer (Stealth Robotics Startup) About Us We’re a tiny, fast-moving team building autonomous systems for heavy industrial machines. We retrofit existing equipment with a plug-and-...Full timeLive outRemote workVisa sponsorshipRelocation package- ...role offers greater autonomy and closer collaboration with the founding team than other positions. Required Qualifications Strong... ...enrolled or finished MS or PhD in Operations Research, Industrial Engineering, Applied Mathematics, or a related quantitative field Domain...Full timeLocal areaRelocation
$500 per month
...DESCRIPTIONThis company handles millions of calls per month and needs an engineer who has worked at that scale before and knows how to build... ...sub-100 milliseconds.You will work on-site directly with the founding team, contributing across architecture, infrastructure, and...H1b- Oho Group is seeking a Founding Mechanical Engineer in San Francisco to lead the design, build, and testing of complex hardware systems. This position requires a Bachelor's degree in a related field and hands-on experience with hardware development, with responsibilities...
- Moritz, an AI-native law firm backed by YC, is hiring a Founding Engineer in San Francisco. You will join as a hands-on leader responsible for product building, scaling the team, and shaping engineering processes from day one. You will ship critical features, own delivery...
- 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...
- Truss is a regulated fintech company seeking the founding head of risk to design and lead the risk program. The role requires building production risk systems, rules engines, and decisioning platforms to catch fraud, abuse, and loss in production. You will own end-to-end...
- ...Founding Engineer (Full Stack) Location: San Francisco Bay Area Type: Full-Time Compensation: Competitive salary + meaningful equity (founding tier) About the role We’re hiring a founding full stack engineer to help architect and build the platform from day one. This is...Full time
- ...Founding Engineer - Real-Time AI Systems (Healthcare) Hybrid- options in Los Angeles or San Francisco Bay area AI in healthcare mostly lives in the cloud. It helps with notes and paperwork, but it isn't present when care decisions are being made. We're changing that. We...
- ...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...
- ...connections will form the foundation of the agentic internet – and Caylex will be the infrastructure powering it. The Role As a Founding Engineer, you’ll play a central role in shaping both our product and engineering culture. You will: Work full-stack across...Full timeWork at office
$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 placementInternship$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$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- ...governance, and workflows — before you deploy. We're a team of engineers creating the operating system for safe AI deployment at... ...market engine from the ground up. You'll work directly with the founding team to build, automate, and scale every part of our pipeline...
$250k
...Founding Engineer (San Francisco Startups | up to $250k+ + equity) Salary: Total compensation up to $250,000+ plus meaningful equity Dex is an intelligent recruiter that helps you run your job search. Tell Dex about your experience, what you want to build or solve, and...- ...Founding Engineer: Build the Email Infrastructure for AI Agents What happens when millions of AI agents need their own email addresses? We're not talking about adding AI to Gmail — we're talking about rebuilding email infrastructure specifically for a world where AI agents...
$170k - $250k
...Founding Engineer Location: San Francisco, CA (Mission District) Work Arrangement: Full-Time | On-site (5 days/week) Compensation: $170,000–$250,000 Base Salary + Equity (0.25–1.5%) Visa Sponsorship: Available for exceptional candidates About the Company We're building...Full timeImmediate startVisa sponsorship$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 workVisa sponsorship- ...You will turn Prox's GTM motion into an engineered system: find the right manufacturers, identify buyer committees, build high-context... ...up, and the right next action after every customer touch. The founding GTM engineer owns that system. You will help us find high-fit...
- ...Parachute is a Y Combinator S25 startup building an agentic trading platform. As a Founding Engineer, you will work directly with the founders to build production-grade agentic systems, backend infrastructure, and state-of-the-art quantitative trading strategies and backtesting...
- ...Blind Bio is solving for. About the Role As an AI‑focused Software Engineer at Double Blind Bio, you will help build and operate... ...research workflows Experience working in early‑stage startups or founding teams Deep expertise in at least one area of the stack (frontend...Worldwide
- ...previously built and exited companies and held senior product and engineering roles at Meta, Airbnb, and Canva. The throughline across... ...infrastructure that bigger players take for granted. The role As Founding Engineer, you’ll build the technical foundation of that...Night shiftWeekend work
- ...manufacturing, and we're building fast. The Role This is a founding growth role, and it is not a traditional marketing job. You... ...with business acumen on top: you'll treat go-to-market as an engineering problem, building scalable, tech-enabled outreach systems rather...
$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 engineer...Contract workNight shift
Do you want to receive more vacancies?
Subscribe and receive similar vacancies to Founding Engineer. Be the first to apply!

