Software Engineer Intern (Fall 2025/Summer 2026)

Reacher is a Y Combinator S25 startup that automates creator marketing for major brands like Under Armour and Hanes. We are seeking a Software Engineer Intern for a 10-12 week summer program (May/June - August 2026) in our San Francisco office. The role involves building full-stack features that ship to production within days, including AI agents, LLM-powered tools, and backend systems using Python, FastAPI, and PostgreSQL. Interns develop responsive UIs with React and Tailwind, with direct customer access to brands and creators. Required: CS major with completed core coursework, sophomore or above. Preferred: Prior startup experience, ML/AI coursework, deployed apps with real users, side projects, or open-source contributions. Compensation is $6K-$10K monthly. US citizen or visa holders only.