Founding Engineer
Fabrion
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 a unique opportunity to own 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 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. Other Details Seniority level: Mid‑Senior level Employment type: Full-time Job function: Engineering and Information Technology Industries: Technology, Information and Internet #J-18808-Ljbffr
$150k
...Job Description Job Description About the Role This is a founding engineering seat at a Y Combinator–backed consumer wearable startup building hardware at the intersection of biometrics, emotional intelligence, and on-device inference. The team is small, the product...SuggestedContract workRemote work$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...SuggestedH1b- ...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...SuggestedFull timeWork at office
- ...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...Suggested
$120k - $190k
...and compliance workflows — helping paramedics get paid and protecting 911 services across the country. We're looking for a Founding Engineer to join as one of the earliest technical hires. This role blends hands-on, end-to-end engineering with direct customer...SuggestedWork at officeImmediate startRemote work2 days per week3 days per week$200k
...products for private market investing. As a Senior Software Engineer on Meridian, you’ll own the technical design and delivery of major... ...sequencing tradeoffs through launch and iteration. This is a founding engineer role on a zero-to-one product with meaningful...Work at office2 days per week$7.5k
...Job Description Job Description Founding Engineer - GovTech Location: San Francisco, CA (In-Office) Partnership: EQL Tech has been exclusively retained by a high-growth technology startup to appoint a Founding Engineer to build, from close to zero, the infrastructure...Work at officeRelocationVisa sponsorshipRelocation package$90k - $160k
...company that grew to over $100K ARR in under a month during its accelerator. Founded 2025 · 1–10 people (Seed) · Industry: AI Tools The Role The client is hiring its first Founding GTM Engineer to build the automated systems behind its revenue motion from scratch....Full time- ...Weave At Weave, we're building the best software for the best engineering teams to move faster, and we want to hire exceptional sales... ...Andrew runs engineering at Weave, and before that worked as the founding engineer at Causal. Responsibilities Build pipeline:...Flexible hours
- ...looking for someone with a founder mentality, ready to own major product and business outcomes, not just tickets. This role is part founding engineer, part forward‑deployed engineer, and part customer success when it's needed, until the CS agents we're building take that over...Live in3 days per week
- ...tl;dr: This is a 1 of 1 role. We're looking for a founding engineer to work alongside a Thiel Fellow founder as employee #1 - with 5X more equity than most "founding engineers". About Empathic “…but I tell you all today, I would rather die a man than live for all eternity...InternshipWork at office
$100k - $200k
...innovation. Learn more at voicecursor.ai. Role Description This is a full-time, on-site role based in the San Francisco Bay Area. As a Founding Engineer, you will play a pivotal role in shaping the technical foundation of Voice Cursor. Your day-to-day responsibilities will...Full time10 hours per weekFlexible hours- ...the company | Founding Engineer | San Francisco, CA | Company: We are building an executive voice engine (the company). This is a multi‑agent AI system that learns how a leader thinks and produces content indistinguishable from what they'd write. Think: a specialized...
$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- ...to automate the repetitive work currently handled manually across emails, spreadsheets and legacy systems. They are hiring a Founding Engineer to work directly with the founders and customers, understand how these businesses operate and build the product from first conversation...
- ...needed. No hand‑holding. No waiting for specs. You're a full‑stack engineer, an AI engineer, and a product engineer in one person. Former... ...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...
- ...energy, telecom, healthcare, and more. AI is making it easier to ship code; Metalware is making it easier to ship secure code. Founding Engineer We’re looking for founding engineers to drive our product development from the ground floor. You won’t just optimize existing...Weekend work
$140k - $180k
...About the RoleJoin a small, high-velocity founding team as engineer #4, working directly with the CTO and fellow founding engineers at an AI-powered talent acquisition startup in San Francisco. This is a hands-on, high-ownership role where you'll ship features to production...Visa sponsorship$130k - $150k
...Founding Engineer San Francisco, CA Full-time Hybrid About Shelby Shelby is on a mission to eliminate the friction of relocation for startups and their new hires. Finding a home in a competitive market like the Bay Area is stressful and time‑consuming. We are a tech-enabled...Full timeRelocation$150k - $250k
...Founding GTM Engineer Location: San Francisco (in-person, in-office, full-time ONLY) Compensation: $150k-$250k base + $25K-$50K cash bonus + top of market equity About Virio Virio is building the next-generation B2B GTM stack. Backed by investors and operators...Full timeWork at officeImmediate startRelocation package- ...Career Launch is hiring for this role and related opportunities. Career Launch is hiring candidates for Founding Engineer roles and similar opportunities with fast-moving teams. This is a remote-friendly opportunity for candidates who are analytical, practical, and comfortable...Remote work
$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- ...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 timeWork at officeImmediate startVisa sponsorshipRelocation package
- ...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...
$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$200k - $300k
...talent at innovative companies. Our team is 100% remote and we work with teams across the United States to help them hire. Founding Engineer (Full-Stack) Location: San Francisco, CA Company Stage of Funding: Seed / Early-Stage AI Startup Office Type: On-...Work at officeRemote workVisa sponsorship$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$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- ...tl;dr 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...
- ...and strategic operators. Now we need to build fast enough to match customer demand. The Role This is not a typical engineering role. You’ll be our founding engineer, with an outsized role in how the product, company, and engineering culture evolve. You’ll write code,...
Do you want to receive more vacancies?
Subscribe and receive similar vacancies to Founding Engineer. Be the first to apply!


