Backend Engineer, Part-Time AI Coding Task Authoring - Remote (United States)

OpenTrain AI is seeking a backend engineer to create and evaluate coding tasks used to train and test AI coding tools. The role involves building reproducible test environments, writing reference implementations, and reviewing technical submissions for defects and performance issues.

Responsibilities:

• Create realistic coding tasks for feature work and bug fixes
• Set up reproducible test environments and automated checks to verify submissions against expected behavior
• Produce the reference implementation for every coding task
• Review technical submissions, calling out defects and performance bottlenecks

Requirements:

• Professional fluency in English
• Hands-on expertise in backend development using Python, Java, Rust, Go, C++, TypeScript, Node.js or a similar backend language
• Experience with scalable service and API development, software debugging, and automated test writing