2,916 Founding Engineer jobs
Founding engineer roles building the first product at early-stage startups.
Senior Software Engineer, Product
One of the first engineers building Holly's product end-to-end (data model, backend, frontend) — software local governments use to hire and manage their workforce. Modern TypeScript stack: React with TanStack Start/Next.js, Postgres/Drizzle, plus LLM/agentic AI features via Vercel AI SDK and similar tools.
Robotics Integration Engineer
Hands-on builder role at a camera-based robotics perception startup: physically integrate the perception stack onto test vehicles and aircraft — enclosures, mounts, cable harnesses, power distribution, and drive-by-wire — then document and maintain the fleet. Centers on parametric CAD, 3D printing/machining, and electrical integration.
Software Engineer, AI Tooling
Builds the AI agent infrastructure at MatX, a custom AI silicon company: making coding agents first-class users of internal infra with their own identities and audited access, running them in ephemeral VMs and no-egress sandboxes, and maintaining a company knowledge base pulled from the monorepo, design docs, and Slack.
Senior Software Engineer
Senior Software Engineer building healthcare provider operations software using Python/Django backend and React/JavaScript/TypeScript frontend to automate licensing, credentialing, and compliance workflows.
Staff Software Engineer
Staff Software Engineer at Medallion building a provider operations platform for healthcare teams, using Python/Django backend and React/JavaScript/TypeScript frontend to automate licensing, credentialing, and compliance workflows.
Software Engineer
Builds and maintains healthcare provider operations software using Python/Django and React/TypeScript, automating licensing, credentialing, and compliance workflows to improve patient care and revenue cycles.
Software Engineer, Product
Rebar is hiring a full-stack product engineer (frontend-skewed) in NYC to own the client-side architecture of its AI quoting platform for commercial HVAC, electrical, and plumbing — a collaborative Konva canvas editor over huge construction drawings, with React/TypeScript on the front end and Python/Postgres on AWS/GCP behind it.
Senior or Staff Software Engineer, Infrastructure
Build and maintain the cloud infrastructure, Kubernetes clusters, and developer tooling that power AcuityMD’s AI-driven healthcare platform, ensuring reliability, security, and fast delivery for MedTech teams.
Senior Software Engineer, Inference
A Senior Software Engineer who bridges AI research and production, designing scalable inference APIs and infrastructure for Assembly AI’s voice AI models, handling 1M+ API calls daily.
Avionics Integration Engineer
Mach Industries is hiring an Avionics Integration Engineer in Huntington Beach to develop, integrate, and test avionics hardware and software for autonomous unmanned aerial defense platforms. Day to day this means architecting avionics systems, debugging electronics and flight software (PX4/Ardupilot, MAVLink), tuning RF comms links, and running integration testing across vehicle prototypes.
Member of Technical Staff - Software Engineer
Build real-time AI-native workflows and tooling for developers, integrating cutting-edge AI tools to reshape software creation and maintenance.
Staff / Principal Software Engineer, Product
Staff/Principal engineer on Lovable's Product team, building and scaling the AI software-creation platform end-to-end for millions of users — owning features from architecture through production across a React frontend, Golang/Rust backend, and cloud infrastructure (Cloudflare, GCP, AWS).
Electronics Integration Engineer
Senior engineer designing and integrating electronic systems for quantum computers. You will develop custom PCBs, manage rack and cryostat assemblies, and use lab instrumentation like VNAs and oscilloscopes, while utilizing Python for automation and testing.
Senior Software Engineer
Senior full-stack engineer (back-end leaning) at Elective, a Vancouver Series A 'Learn Now, Pay Later' fintech. You'll shape architecture and build across checkout, underwriting, loan management, and public APIs on a TypeScript/Node/PostgreSQL stack with Temporal, in a hybrid role in downtown Vancouver three days a week.
Systems Engineer (Infrastructure)
Own the infrastructure that lets Adapt's AI agents run code and complete real work: build secure multi-tenant sandbox orchestration and distributed storage, and improve reliability, performance, and cost of customer workloads. Core stack is Rust or Go, Linux, TypeScript, cloud, Kubernetes, and microVM/container runtimes like Firecracker or gVisor.
Software Engineer, Growth
Own the software behind how families discover Tin Can: run the Shopify storefront, build the referral program end to end, and create self-serve landing-page tooling for growth marketers. Core stack is TypeScript APIs (AWS Lambda, Cloudflare Workers) plus reliable third-party commerce integrations.
Software Engineer, Annotation Systems
Backend software engineer at Obvio building the distributed annotation systems at the core of the ML feedback loops behind its AI-assisted traffic-enforcement cameras. Day to day: high-throughput data pipelines, secure and observable backend services, and clean APIs built with product, ML, and ops teams.
Software Engineer, Communities
Own the Communities product at Tin Can end to end: build the self-serve community directory portal, APIs, and ops tooling (Next.js, TypeScript on AWS Lambda, Postgres), plus the call-routing rules that decide whether a community call connects — all while carefully handling children's data.
Intern, Software Engineering, 2027
Quarter-long, paid ($1,800/week) software engineering internship for 2027 at Cowboy Space Corp, a San Carlos, CA startup building space-based solar power satellites. Interns design, build, and test software across flight, embedded, and ground systems — avionics, GNC, signal processing, on-orbit GPU/TPU compute, and mission operations tooling — using C, C++, and Python.
Senior Software Engineer, Core Platforms
Bot Auto is hiring a Senior Software Engineer to own the core platforms that take its autonomous-driving software from commit to running truck: the C++ build/packaging toolchain, CI/CD and container pipelines, Kubernetes and infrastructure-as-code, and backend/edge services connecting cloud to the fleet, with security throughout.