Software Engineer - Backend

About the role

This is an hourly, at-will contractor engagement reviewing and writing backend code to help train and evaluate AI coding models. Fully remote and asynchronous. Minimum 15 hours per week. US-based candidates preferred. Pay runs $25 to $100 per hour. Rolling start dates as projects launch.

What you'll do

Hands-on backend work, aimed at making AI-generated code sharper:

• Review and evaluate AI-generated backend code (Node.js, Python, Java, or Go) for correctness, efficiency, scalability, and clarity.
• Write high-quality backend solutions to server-side and API development problems across a range of difficulty levels.
• Create clear, developer-friendly explanations for architectural decisions, code logic, and problem-solving strategies.
• Identify and flag edge cases or ambiguities in problem statements or AI responses.

You're a great fit if

Strong backend chops and the ability to explain them plainly:

• Fluent in English, with strong written communication and the ability to clearly explain backend coding concepts.
• Deep backend expertise: server-side languages and frameworks (Node.js, Python, Java, Go), RESTful APIs, databases, and asynchronous programming.
• 3-5 years with backend frameworks, tools, or domains (Express, Django, Spring Boot, microservices, cloud platforms) is a plus.
• Bachelor's degree (or pursuing one) in Computer Science or a related field. Master's or PhD preferred, not required.
• Bonus: experience with data labeling, RLHF, or other AI training projects.

Why this work is worth your time

• Flexible workload: work from anywhere, on your own schedule.
• High impact: your work directly improves models used by top AI labs and Fortune 500 teams.
• Clear ownership: know what success looks like and have the autonomy to deliver.
• Growth potential: consistent high performers spearhead new programs and mentor incoming subject-matter experts.

Interview process

• Complete a screening with an AI interviewer, in English, covering your background and experience.
• Sit a domain-specific interview assessing backend expertise, including distributed systems, microservices, and backend frameworks.

About the team

This data engine accelerates breakthrough AI. The role, expert services, and marketplace let teams iterate on data as nimbly as they iterate on code, enabling safer, smarter models in production. Backed by SoftBank, Andreessen Horowitz, B Capital, Gradient Ventures, Databricks Ventures, and Kleiner Perkins. Trusted by leading research labs and enterprises worldwide.

Ready to apply?

Click Apply above and take one or more domain-specific assessments. Candidates reviewed on a rolling basis; you'll be contacted if your background matches an active project.