Contrario (YC W25) is building the AI-powered recruiting engine for startups. We place top talent at companies like Eight Sleep and Slash through a managed network of 100+ high-performing recruiters and boutique agencies. We’re profitable, growing quickly, and scaling toward $1M+ ARR.

About Contrario
Contrario (YC W25) is building the modern, AI-powered recruiting marketplace, connecting elite startup recruiters with fast-growing companies through AI-powered matching and operational tools. We’ve raised $2.5M from Y Combinator and Nexus Venture Partners, with angels from Hudson River Trading, Stanford, and OpenAI. Our customers include 50+ YC and venture-backed startups hiring across engineering and GTM roles.

The Role
We’re hiring a Software Engineering Intern to join us in-person in San Francisco for Summer 2026. You’ll work directly with the founders and have full ownership over features—from concept to deployment. We’ll provide a housing stipend and cover meals in the office during your internship.

What You’ll Do

• Build and ship full-stack features end-to-end using Next.js, TypeScript, and Supabase
• Develop and improve AI-powered search, matching, and recruiter tools
• Collaborate directly with founders to prioritize and iterate on high-impact product ideas
• Take full ownership of projects, operating with speed, autonomy, and precision in a fast-paced environment

What We’re Looking For

Required:

• Current undergrad/masters student pursuing a degree in Computer Science or related field (EE, Math)
• Strong proficiency in TypeScript and modern web frameworks (Next.js/React)
• Comfort working across the full stack (frontend, backend, database)
• Interest in AI/LLMs, embeddings, and retrieval systems
• High agency, entrepreneurial mindset, and ability to work independently
• Excitement to be hands-on in a small team and ship meaningful features fast

Nice to Have:

• Experience with Supabase/Postgres
• Prior experience at a startup or working on personal projects from scratch
• Understanding of AI/ML fundamentals

What You’ll Get

• Housing stipend for the summer
• All meals covered in the office
• The chance to see your engineering directly translate into real business growth

Our Stack

• Frontend: Next.js, React, TypeScript, Tailwind CSS
• Backend: Next.js + TypeScript
• Database: Supabase (Postgres)
• Infrastructure: Vercel

We’re building a scalable platform for high-volume data transfers between recruiters and companies. Our full-stack application helps manage candidate interactions, application submissions, and more. Alongside that, we’re developing AI-native sourcing tools, powered by the latest ML research, to make recruiters 10x more efficient.