YC Work at a Startup - United States, San Francisco, IT - Software Development

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 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 Hypercubic as a Founding Software Engineer in San Francisco. Shape AI systems that analyze and rearchitect critical legacy enterprise applications. You'll work directly with the CTO, owning architecture and product direction from prototype to production. This role demands strong fundamentals...

Join as a Founding GPU Kernel Engineer in San Francisco. Hand-tune and optimize low-level GPU kernels for ML workloads, pushing hardware limits. Deep expertise in CUDA/ROCm, profiling tools, and GPU assembly is essential. Receive equity, bonus, benefits, and relocation assistance in this pivotal ...

Join Leadbay in San Francisco as a Frontend Engineer. You will build an engaging sales app using React and TypeScript, developing smart crawlers and AI-powered tools. This role requires US citizenship/visa and offers equity compensation. Shape the future of B2B lead generation.

Join as a Founding Engineer to architect the Unity mobile app for Pax Historia from scratch. You will build the core gameplay loop, optimize for mobile performance, and integrate with backend services. This role requires 3+ years of experience shipping polished Unity apps to iOS/Android stores. B...

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 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 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.