YC Work at a Startup - United States

Join Truth Systems as a Founding Full-Stack Engineer in San Francisco. You'll build our core trust & safety platform from 0→1 using React, TypeScript, Next.js, and Python. We seek a product-focused, empathetic builder with strong full-stack skills. Receive meaningful equity (0.3-1%) and comprehen...

Join Verne as a founding Robotics Data Infrastructure Engineer in San Francisco. Architect and deploy critical AWS and edge data pipelines for real-world robots. You'll manage large-scale multimodal datasets and build MLOps tooling, directly impacting production systems. Requires strong Python, A...

Join a New York team building autonomous AI agents for e-commerce support. As a Full-Stack Developer, you'll own features end-to-end using Python, FastAPI, TypeScript, and React. You'll ship fast, leverage AI tools daily, and focus on scalable systems and clean architecture. Help create an AI-man...

Join Idler in San Francisco as a Software Engineer. Build agentic systems and tooling for cutting-edge AI coding environments used by leading labs. We seek passionate developers, including new grads (US only), to ship features fast. Enjoy full benefits, latest tech, PTO, and team events.

Join FLEETLINE as a Founding Algorithm Developer in NYC. Build and scale core optimization algorithms (MILPs, ML, RL) for large trucking companies. We seek a versatile Python/TypeScript engineer who ships code fast, thrives in ambiguity, and works directly with customers. This is an in-office rol...

Join Uplane as a Founding AI Engineer in San Francisco. Build the core AI engine for automated marketing using LangGraph, TypeScript, and PostgreSQL. Own projects end-to-end in a fast-paced, well-funded startup. Visa sponsorship is available for this on-site role.

Join Uplane as a Founding Full-Stack Engineer in San Francisco. Build our core AI system using TypeScript, Node.js, and Nuxt/Vue with PostgreSQL. Be a key early employee, own the product lifecycle, and solve a massive problem in marketing tech. We offer visa sponsorship for this on-site role.

Join Flick as a Founding Frontend Engineer in Sunnyvale. Lead the development of our AI filmmaking interface, building the core canvas, timeline, and creative tooling. We seek a React/TypeScript expert passionate about fast, intuitive UIs and scalable architecture in a startup environment. Shape ...

Join as a Founding Product Engineer in San Francisco. Own the full user-facing platform, from polished React/Next.js interfaces to robust backend services. You'll ship complete products, leveraging AWS/Kubernetes, with a sharp eye for design. Receive equity, benefits, and relocation assistance.

Join as a Founding GPU Compiler Engineer in San Francisco. Build the core AI compiler stack from StableHLO to optimized GPU binaries for NVIDIA, AMD, and TPUs. Deep LLVM/MLIR expertise and low-level GPU optimization in C++/Rust are key. Shape the architecture and culture from day one with equity ...

Join as a Founding Backend & Infrastructure Engineer in San Francisco. Architect and scale core systems for AI-powered document intelligence using Python and cloud tech. Own production infrastructure end-to-end, from Kubernetes to distributed systems. Receive significant equity and visa sponsorsh...

Join as a Founding ML Researcher in San Francisco. Shape core ML research and build production-ready document AI models from idea to deployment. Requires 3+ years with PyTorch, CV, and deploying SOTA models. Receive significant equity in a talent-dense founding team.