Software Engineer I, Handshake AI

Cacheflow; San Francisco (CA); On-site; USD 120,000 - 180,000; Full time

Benefits offered by this job

Equity

401(k) match

Parental leave

Mental health support

Wellness stipend

Learning stipend

Remote & Office stipend

Flexible PTO

Holidays + 2 flex days

Team outings

Referral bonuses

Job summary

Handshake is seeking a Software Engineer II to own meaningful pieces of our core product—building systems that power how millions discover opportunities, connect with employers, and launch careers. You’ll work with product managers, designers, and senior engineers to ship full-stack experiences that are reliable, scalable, and user-obsessed.

This role emphasizes ownership beyond tickets, collaboration across teams, and contributing to architecture while delivering high-quality code and polished

Qualifications

• 1-5 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.

Responsibilities

• 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.

Skills

TypeScript

Tools

React

Next.js

GraphQL

Ruby on Rails

PostgreSQL

Job description

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 feel

• Partner hand-in-hand with world-class AI labs, Fortune 500 partners and the world’s 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.

About the Role

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.

Location: San Francisco, CA | 5 days/week in-office

• 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

Desired Capabilities

• 1-5 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

Extra Credit

• 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

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 coaching

Wellbeing: Medical, dental, and vision, mental health support, $500 wellness stipend

Growth: $2,000 learning stipend, ongoing development

Remote & Office: Internet, commuting, and free lunch/gym in our SF office

Time Off: Flexible PTO, 15 holidays + 2 flex days

Connection: Team outings & referral bonuses

Explore our mission, values, and comprehensive US benefits at joinhandshake.com/careers.