Jobs at Y Combinator

Executive Assistant supporting two General Partners with calendar management, scheduling, communications, travel coordination, event planning, college tours, writing projects, and ad hoc administrative tasks. The role requires independent judgment, strong organization, excellent writing and communication skills, multitasking, and cross-functional collaboration. Candidates must reside in the San Francisco Bay Area and work onsite in San Francisco at least three days weekly, with additional availability for events.

Designing and developing internal tools for Y Combinator, focusing on productivity software and event management for startup founders and teams.

The role involves building full-stack web applications, evaluating growth-stage companies, and contributing to investment decisions for Y Combinator.

The Product Engineer will develop critical software tools for founders, manage the YC program, and collaborate with a small team of engineers.

Own new AI-native products end-to-end from 0→1: design, build, and ship full-stack systems and developer tools (agents, embeddings, semantic search, knowledge graphs). Drive developer UX, make product decisions, engage communities, and iterate rapidly using AI-enabled dev stacks.

As a Frontend Leaning Full Stack Engineer, you will improve internal software, enhance user-facing tools, and shape UX/UI for founders and investors, focusing on efficiency and product ownership.

Lead end-to-end production of YC flagship events, building schedules, managing vendors, budgets, permits, security, and guest experience. Partner with internal teams, handle on-site load-in/load-out, and independently run complex multi-day and large-scale events.

The role involves designing and building full-stack applications for Y Combinator's operations, focusing on automation, user experience, and direct collaboration with non-technical stakeholders.