Software Engineer II

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.

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.

As a Software Engineer II at Handshake, you'll own meaningful pieces of our core product—building the systems that power how millions of users discover opportunities, connect with employers, and launch their careers. You're past the fundamentals and ready to take on more: driving features end-to-end, contributing to technical design, and raising the bar for the engineers around you.

You'll work closely with product managers, designers, and senior engineers to ship full-stack experiences that are reliable, scalable, and user-obsessed. This is a role for someone who wants real ownership, not just tickets.

• Own features end-to-end across frontend and backend, from technical design through production and iteration

• Build scalable full-stack systems powering core user journeys—search, discovery, matching, and onboarding flows

• Ship backend APIs, async workflows, and frontend experiences with a high bar for reliability and performance

• Contribute meaningfully to architecture discussions, helping establish patterns the team can build on

• Write clean, well-tested, maintainable code and actively participate in code reviews

• Partner with product and design to translate ambiguous requirements into polished user experiences

• Identify and address technical debt, system reliability gaps, and performance bottlenecks proactively

• 3–5 years of professional software engineering experience building full-stack applications

• Strong proficiency in TypeScript across frontend and backend surfaces

• Hands-on experience with modern web stacks (React, Next.js, GraphQL, Ruby on Rails)

• Solid command of relational databases (PostgreSQL) and thoughtful data modeling

• Track record of owning features independently and driving them to completion

• Strong communicator who collaborates well with product, design, and cross-functional partners

• Comfortable navigating ambiguity and making sound tradeoffs in a fast-paced environment

• Experience building AI-powered products, conversational interfaces, or agentic frameworks (e.g., OpenAI APIs)

• Familiarity with workflow orchestration tools like Temporal or async job systems

• Exposure to marketplaces, matching systems, or multi-step onboarding flows

• Experience with cloud infrastructure (AWS, GCP) and deployment pipelines

• Background at high-growth or scaling technology companies

• Familiarity with design systems and component libraries for rapid deployment