Associate Software Engineer, RLE

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 1600 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. Weve 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 feel

• Partner hand-in-hand with world-class AI labs Fortune 500 partners and the worlds top educational institutions

• Work together with engineers scientists operators and more from Palantir Meta Scale AI and former YC founders

• Build 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.

Were hiring an Associate Software Engineer to help build our Reinforcement Learning Environments (RLE) platformthe systems where frontier AI models learn to complete real-world work.

This is a hands-on growth-oriented role where youll 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)

• Contribute to building RLE environments and supporting infrastructure

• Implement features across backend systems and frontend interfaces

• Work with senior engineers to improve system reliability and performance

• Help build modular workflow domains (e.g. engineering finance legal)

• Support data pipelines that power model training and evaluation

• 02 years of experience (internships or full-time) in software engineering

• Familiarity with backend development and APIs

• Working knowledge of ReactJS and TypeScript

• Understanding of databases (e.g. PostgreSQL) and basic system design

• Eagerness to learn and operate in fast-paced environments

• Exposure to cloud platforms (AWS GCP)

• Experience with data pipelines or ML-adjacent systems

• Interest in AI/ML or simulation systems

• Ships reliable features that improve RLE functionality

• Grows into owning small components independently

• Contributes to faster iteration and better developer velocity

Handshake delivers benefits that help you feel supportedand 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: $2000 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

Required Experience:

IC