Applied Engineer, Evaluations Role

• Identify repositories with enough substantive work to support challenging evaluations, and select suitable completed PRs.
• Investigate each problem, its reference solution, and the repository’s architecture, tests, and conventions.
• Write task prompts and build evaluations using automated tests, shell commands, and LLM grading prompts.
• Validate evaluations against reference solutions and deliberately flawed implementations. Find missing checks, incorrect grades, and criteria that unnecessarily constrain how a problem can be solved.
• Run evaluations repeatedly across multiple models and harnesses. Investigate whether failures come from the agent’s solution, the environment, or the grading, and establish that tasks expose meaningful weaknesses in agent performance.
• Refine evaluations through repeated testing and review. Document findings and grading decisions, and work through feedback.

• Strong programming fundamentals and practical experience working in substantial and complex codebases. Languages we create evals for include TypeScript/JavaScript, Python, Java, Kotlin, Go, Ruby, PHP, C++ and Rust.
• The ability to understand unfamiliar code, investigate subtle behavior, and assess whether different implementations solve the same problem correctly.
• Experience writing meaningful tests, including edge cases and regression coverage.
• Attention to detail and patience for repeated investigation and refinement.
• Practical experience using AI coding tools, with the judgment to verify their output and catch mistakes.
• Confidence using Git, test runners, and CI tooling.
• Clear and fluent written and verbal communication with the ability to own a task independently while raising questions when requirements are ambiguous.

• Relevant experience can come from open-source, private, or enterprise repositories. Familiarity with a particular language or ecosystem is helpful; the ability to learn the repository and make sound engineering judgments matters more than its popularity or your public contribution history.

Project and contracting process: the hiring partner. Applications continue on the provider's website.