YC Work at a Startup

Join Keystone as a Founding Engineer in San Francisco. Shape the future of autonomous software engineering using TypeScript, React, Python, and AWS. Own the core product and culture while receiving significant equity, full benefits, and a wellness-focused environment.

Join mcp-use as an Open Source Engineer in San Francisco or Zürich. Lead our popular MCP SDK, engage with a global developer community, and shape the future of AI agent tooling. This role requires open-source experience, MCP expertise, and strong communication skills. Receive competitive equity w...

Join a pioneering team in New York building autonomous AI agents for e-commerce support. As a Founding Engineer, you'll own full-stack features using Python, FastAPI, React, and Next.js on AWS. Your role focuses on shipping scalable AI systems, leveraging tools like Cursor daily, and earning sign...

Join as a Founding Engineer to build autonomous AI agents for e-commerce support. You'll own full-stack features using Next.js, Python, and AWS, working in rapid build-measure loops. This New York-based role offers significant equity to a developer who ships quality code and leverages AI tools da...

Join a Y Combinator-backed startup in Zürich as a Software Engineer. Develop core AI agent infrastructure using Python and cloud platforms. Build scalable systems, ensure operational excellence, and shape the future of office automation. Thrive in a fast-paced, ownership-driven environment.

Join Delty in San Francisco as a Full Stack Software Engineer to build healthcare's AI operating system. You'll design end-to-end systems, integrate AI/ML models, and work across the entire tech stack. This high-impact role offers the chance to learn from ex-Google engineers in a fast-paced start...

Join Parametric in San Francisco as a Senior ML Infrastructure Engineer. Build the core systems powering our robotics autonomy stack from the ground up. You'll design production-grade infrastructure for the full ML lifecycle, enabling rapid iteration. This early-stage role requires expertise in c...

Join our team in San Francisco as a Software Engineer for the Data Engine. You will build robust systems and tools to collect, process, and manage large-scale robotic training datasets. This role requires expertise in Rust/C++ and involves hands-on work across hardware, software, and data pipelin...

Join Channel3 in NYC to build the database powering AI commerce. Develop backend systems using computer vision and multimodal models to understand billions of products. This role focuses on building reliable, cost-efficient search and deduplication at scale. Enjoy team dinners and a fully stocked...

Join Channel3 as a Fullstack Engineer in New York to build the definitive internet product database. You'll leverage Python, TypeScript, and React to shape merchant-facing tools and pioneer agentic commerce UX. This role offers ownership of frontend architecture in a fast-paced environment with t...

Join mcp-use as a foundational Cloud Engineer in San Francisco or Zürich. Design and build our scalable, secure cloud infrastructure from the ground up for our popular open-source MCP platform. You'll architect systems for thousands of users, ensuring reliability, performance, and seamless privat...

Join mcp-use to build leading open-source dev tools for the Model Context Protocol (MCP). Develop the premier platform for deploying MCP servers and agents, enhancing our popular SDK used by NASA, SAP, and 5,000+ companies. We seek a brilliant, high-agency software engineer passionate about LLMs ...