Senior Software Engineer, Coding

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.

About the role

We’re looking for a Senior Software Engineer to help build the systems that power high-quality coding data and evaluations for next-generation AI models. You’ll work on technically complex projects involving software engineering benchmarks, code review evaluation, agentic coding workflows, and developer-facing tools. You’ll combine strong engineering judgment with hands-on execution, designing reliable systems that enable teams to create, validate, and improve sophisticated coding datasets. This is an opportunity to shape foundational infrastructure at the intersection of software development and AI. You’ll operate with significant ownership, collaborate closely with engineers and technical program leaders, and help establish the standards and tools that support our fastest-growing AI initiatives.

Responsibilities

• Design, build, and operate scalable software systems for coding evaluation, data generation, and agentic development workflows.
• Develop tools and services that analyze, validate, and improve AI-generated code.
• Build reliable pipelines for code execution, testing, benchmarking, and quality measurement.
• Partner with engineering, research, operations, and customer-facing teams to translate complex requirements into practical systems.
• Drive technical decisions across architecture, APIs, data models, observability, and operational excellence.
• Improve engineering velocity through reusable frameworks, automation, and developer tooling.
• Lead projects from ambiguous problem definition through design, implementation, launch, and iteration.
• Mentor engineers through design reviews, code reviews, and day-to-day collaboration.
• Establish high standards for maintainability, correctness, security, and reliability.

Requirements

• 5+ years of professional software engineering experience.
• Strong proficiency in Python, JavaScript/TypeScript, Go, or another modern programming language.
• Experience designing and operating production systems with meaningful scale, reliability, and performance requirements.
• Strong understanding of software engineering fundamentals, including testing, APIs, data structures, distributed systems, and observability.
• Experience building developer tools, infrastructure, data pipelines, evaluation systems, or other technically complex products.
• Ability to work effectively