Software Engineer, Acquisition & Identity

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, you will contribute to the development of critical systems that power how users join and trust our platform; spanning user acquisition, onboarding, identity, and fraud prevention. You will work alongside experienced engineers and cross-functional teams to deliver reliable, scalable, and high-performance software solutions. This role is ideal for someone with a strong foundation in software engineering principles and the drive to grow through meaningful, impactful work.

• Contribute to the design and implementation of platform systems that support user acquisition, onboarding, and identity infrastructure.

• Help build and maintain fraud prevention systems to protect the integrity of our platform.

• Write high-quality code and support robust testing strategies to ensure product reliability.

• Collaborate with product managers, designers, and senior engineers to create seamless user experiences from first touch through activation.

• Actively participate in code reviews and learn from experienced engineers to accelerate your technical growth.

• 2+ years of software engineering experience, with a backend-leaning full stack orientation.

• Foundational proficiency in programming languages such as Java, Python, or Ruby.

• Familiarity with building or contributing to platforms and scalable infrastructure systems.

• Exposure to cloud platforms like AWS or Azure.

• Ability to break down problems, take ownership of well-scoped tasks, and see them through to completion.

• Strong problem-solving skills and eagerness to tackle new technical challenges.

• Clear communication skills and a collaborative, team-first mindset.

• Interest in identity, trust & safety, or fraud prevention.