Associate Software Engineer, RLE

About Handshake Handshake was founded on a simple belief that everyone deserves a path to a great career, regardless of where they went to school or who they know. Today, we power 25 million job seekers, 1 million+ employers, and 1,600 educational institutions. In 2025, we started Handshake AI and built the fastest-growing AI data business in history. We work directly with frontier AI lab researchers to create evaluations, publish benchmarks, and push the boundary of data. We’ve grown from $0 to ~$1B run rate and pay ~$60M to over 30K individuals every month. Why Join Handshake Now Shape how every career evolves in the AI economy, at global scale, with impact your friends, family and peers can see and feelPartner hand-in-hand with world-class AI labs, Fortune 500 partners and the world’s top educational institutionsWork together with engineers, scientists, operators, and more from Palantir, Meta, Scale AI, and former YC foundersBuild a massive, fast-growing business with billions in revenue About Handshake AI Human data is the core infrastructure to AI advancement. Frontier AI labs currently improve model capabilities with various data-intensive post-training techniques. We believe that data spend for AI training will increase by 3-5x in the next few years and continue for much longer as models take on new domains. Handshake AI supports all of the frontier AI labs, working on their most complex data at the largest scale. About The Role We’re hiring an Associate Software Engineer to help build our Reinforcement Learning Environments (RLE) platform—the systems where frontier AI models learn to complete real-world work. This is a hands-on, growth-oriented role where you’ll contribute to building core systems, learn quickly from senior engineers, and gain exposure to cutting-edge AI infrastructure. Location: San Francisco, CA (in-office, 5 days/week) What You’ll Do Contribute to building RLE environments and supporting infrastructureImplement features across backend systems and frontend interfacesWork with senior engineers to improve system reliability and performanceHelp build modular workflow domains (e.g., engineering, finance, legal)Support data pipelines that power model training and evaluation What We’re Looking For 0–2 years of experience (internships or full-time) in software engineeringFamiliarity with backend development and APIsWorking knowledge of ReactJS and TypeScriptUnderstanding of databases (e.g., PostgreSQL) and basic system designEagerness to learn and operate in fast-paced environments Nice to Have Exposure to cloud platforms (AWS, GCP)Experience with data pipelines or ML-adjacent systemsInterest in AI/ML or simulation systems What Success Looks Like Ships reliable features that improve RLE functionalityGrows into owning small components independentlyContributes to faster iteration and better developer velocity Perks Handshake delivers benefits that help you feel supported—and thrive at work and in life. The below benefits are for full-time US employees. 🎯 Ownership: Equity in a fast-growing company 💰 Financial Wellness: 401(k) match, competitive compensation, financial coaching 🍼 Family Support: Paid parental leave, fertility benefits, parental coachin 💝 Wellbeing: Medical, dental, and vision, mental health support, $500 wellness stipend 📚 Growth: $2,000 learning stipend, ongoing development 💻 Office: Commuting support, free lunch, and gym in our SF office 🏝 Time Off: Flexible PTO, 15 holidays + 2 flex days 🤝 Connection: Team outings & referral bonuses Compensation Range: $135K - $150K