Founding Engineer: Build Core Backend & Own Features
Weekday AI (YC W21)
A promising startup in San Francisco is seeking a Founding Engineer to join their team. In this role, you'll take ownership of building and scaling backend systems using Python and TypeScript, while collaborating closely with founders. Ideal candidates should have 1-5 years of experience and a strong problem-solving mindset. This position offers competitive compensation, high autonomy, and an opportunity to grow into leadership as the company scales. #J-18808-Ljbffr Weekday AI (YC W21)
$150k - $250k
...Venture-backed startup building the decision intelligence... ...industrial companies. As a Founding Engineer, you'll work across backend systems, infrastructure,... ..., including frontend features, infrastructure, deployment... ...at scale Comfortable owning features end-to-end, from...BackendWork at officeImmediate startVisa sponsorshipRelocation package- ...Caylex is building the infrastructure layer... ...it. The Role As a Founding Engineer, you’ll play a... ...user-facing product features. Build high-... ...building large-scale backend infrastructure or... ...scaling them. Enjoy owning large product... ..., and DX are the core product. Why Join...BackendFull timeWork at office
- ...About Terac We’re building a search engine for human thought... ...Terac to test features and products before... ...being part of the founding team defining the... ...who wants to own huge pieces of the... ...parts of Terac’s core platform (e.g. sourcing... ....js, and modern backend tools (tRPC,...Backend
- ...science. We’re building a future where clinical... ...Software Engineer at Double Blind... .... You will be a core contributor on a... ...early‑stage team, owning AI‑powered features end‑to‑end and helping... ...frontend, backend, infrastructure,... ...stage startups or founding teams Deep...BackendWorldwide
$100k - $200k
...computer interaction, building the future of... ...Francisco Bay Area. As a Founding Engineer, you will play a pivotal... ...user is looking at. Own the Core Infrastructure: Design... ...build, and optimize the backend systems and low-level... ...and contextual features can be plugged into the...BackendFull time10 hours per weekFlexible hours- ...Founding Engineer (Full Stack) Location: San Francisco... ...help architect and build the platform from... ...unique opportunity to own a significant... ...with ownership over core architecture and... ...production code across backend and frontend,... ...prototype and ship features quickly Help define...BackendFull time
$120k - $200k
...AutoSitu AutoSitu is building an AI‑native review... ...The Role As a Founding Engineer, you will work directly... .... What You Will Own and Drive Build the core intelligence behind... ...analysis Own product features end to end—from system... ...across AI systems, backend infrastructure,...BackendFor contractorsLocal area- ...At Mentum, we’re building the AI-powered assistant... ...The Role As a Founding Engineer at Mentum, you’ll... ...includes designing core components,... ...across the stack—backend, frontend, and ML... ...leaders to co-design features, ensuring our platform... ...want to control your own destiny,...BackendWork at officeShift work
- ...looking for a highly motivated Founding Engineer to join us at the ground floor and help build our product from zero to... ..., build, and scale robust backend systems using Python Develop... ...tools, and full-stack features when required Own core product features end-to-end...BackendFull timeWeekday work
- ...surface area. Everyone owns a domain that... ...THE ROLE As the Founding Forward Deployed Engineer at Sphere, you’ll... ...same rigor to building internal processes... ...ready to hand to core engineering Build custom features and integrations... ...core application backend and data pipeline...BackendContract workWork at office
$130k - $200k
Founding Engineer - Full Stack (AI x Developer Tools)... ...Engineer to help build the foundation of... ...full ownership of core product systems—ideal... ...performance-sensitive backend systems for cloud-... ...key product features across the frontend... ...creative workflows Own infrastructure...BackendFull timeImmediate startVisa sponsorshipWork visa$13 per hour
...venture economy by building the financial... ...are looking for a founding engineer on our new Capital... ...of creating robust backend services and intuitive... ...shipping large features with quick iterations... ...in one of our core languages, or excited... ...from scratch-your own startup, side project...BackendFull timeWork at office- ...world scale. Legion is building autonomous medical... ...working together. Role: Founding Engineer - AI‑Native Mental... ...highest retention‑driving feature in the product.... ...Founding Engineer to own core product and agent systems... ...Own our event‑driven backend - architect and scale...BackendFull timeFor contractorsLive inWork at officeVisa sponsorshipFlexible hoursShift work
- ...Vohra (Superhuman) to build the agentic... ...actually provides value. Backend‑heavy, AI‑native,... ...'re a full‑stack engineer, an AI engineer,... ...plus. What you'll do Own large parts of the... ...their pain. Scope features that actually... ...table. This is a founding role, you'll shape...Backend
- ...people and computers. Of building software that adapts... ...firm, IDEO. Founding Engineer To make this future possible... ...CEO and CTO on building core product and infrastructure... ...from the ground up Own major parts of the stack... ...fetching/state, etc. Backend: Python FastAPI,...Backend
$175k - $375k
...Founding Engineer - build the platform that lets enterprises actually deploy AI... ...engineer who ships fast and owns outcomes end-to-end? Have you... ...and build scalable APIs, backend systems, and developer tooling... ...what gets built next Own features from concept through design...BackendH1bWork at officeVisa sponsorship- ...recruiting space is looking for a Founding Engineer Intern to join their... ...with the CTO to ship features daily and help build a fully agentic system that... ...recruiting process end-to-end. Own full end-to-end... ...ideation to production — for core product features. Collaborate...InternshipVisa sponsorship
- Founding Engineer | Build AI Products That Solve Mission-Critical Problems A client of Venchr is looking for... ...settings. As a Founding Engineer, you’ll own full-stack development across the core platform, building scalable features, AI-driven workflows, and intuitive customer...Full timeWork at office
$150k - $250k
Founding Engineer Salary $150k-$250k + Equity Company Description... ...by General Catalyst, building the essential identity... ..., you will build the core primitives that allow... ...role where you'll own projects end-to-end for... ...company or startup. Strong backend and systems...Backend- Founding Engineer - Early-Stage AI Startup San Francisco, CA (... ...Startup About the Role I’m building Xuman.AI, an early‑... .... You’ll shape the core systems, the product,... ...build, and scale core backend systems and APIs Collaborate... ...to shape user‑facing features Prototype and...BackendFull time
- ...AI, our mission is to build the foundation for enterprise... ...and tester with their own AI QA engineer that validates work in... ...small, mission-driven founding team led by industry... ...What You’ll Do Build core systems that enable AI... ...across the stack — backend , frontend , and AI...Backend
$120k - $150k
Job Title Founding Engineer Salary $120,000-$150,000 + Equity Company... ...as a founding member to build the governance layer for... ...clients to Azure‑centric backend services, directly... ...What You Will Do Build core product and platform features end-to-end using TypeScript...Backend- ...arriving. EICO is building the frameworks to... ...researchers who can ship, engineers who can think from... ...principles, and founding technical leaders... ...will build the core software systems... ...the stack: agent backends, data collection,... ...on. What you’ll own: The product and...Backend
$180k - $225k
Founding Engineer — Confidential (AI Startup, YC/a16z-Backed)... ...well-funded AI startup building a new paradigm for software... ...and CEO. What You'll Own Build and ship micro... ...shipping products or features from ideation to real... ...proficiency with a backend focus Active user of...BackendFull timeRelocationVisa sponsorshipRelocation packageFlexible hours- ...are now using this to build the prime brokerage... ...operating model. Every engineer treats AI as a core part of how they work... ..., automating their own workflows, and building... ...in production a feature real traders use. By... ...comfort across the stack: backend services, data...BackendFull timeWork at officeLocal areaNight shiftWeekend work
- ...Miravoice, we’re building the platform to capture... ...at scale. At its core is an AI voice... ...problem. We're former engineers, tech product... ...Description As a Founding Engineer, you’ll help... ...architecture, ship features, and define the... ...technical skills in backend, distributed systems...Backend
$120k - $170k
...industry, are hiring a Founding Engineer to join their growing... ...Deliver production-grade features across the platform,... ...contextually aware. Build and maintain enterprise... ...,000+ organisations. Own key technical... ...TypeScript/React and strong backend engineering capability...Backend$150k - $220k
...looking for a high-agency Founding Engineer to build core agent infrastructure and... ...including the CEO and CTO — owning critical systems that... ...experience in full-stack or backend software engineering. ~... ...to-end, not just isolated features. ~ Strong computer science...BackendRelocation$150k - $250k
...small, fast-moving team building an agentic integration... ...bringing on our first engineering hire . This is a true founding engineer role: you'll own core systems end-to-end, set... .... Drive end-to-end feature development across frontend, backend, and infrastructure with...BackendVisa sponsorship$150k - $250k
...consumer tech startup building an AI-powered map and social... ...experience. As a Founding Engineer , you'll own problems end-to-end,... ...decisions that shape the core system. This is a high-... ...mobile and web Own features end-to-end from UI to backend Tools: TypeScript, React...BackendRelocationVisa sponsorship
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