Full Stack Engineer

AfterQuery is hiring software engineers to author original coding tasks based on real codebases, used to evaluate and train advanced AI coding agents. You'll connect one of your own private codebases and turn a real engineering problem from it into a task: a clear, maintainer-style issue, a hidden test suite, and a reference solution. Every submission is validated automatically before it's approved, so the ideal candidate is someone who can write a problem a strong engineer would recognize as real work, and a test suite that verifies a solution the way a careful reviewer would. Why Apply Exceptional Pay: $150/hour, fully remote, on your own schedule Real Engineering: Work from your own codebases on problems a strong engineer would recognize as real work Startup Exposure: Contribute directly to frontier AI evaluation with a YC-backed research lab Responsibilities Connect a substantial private codebase of your own to author tasks against Author maintainer-style issues, hidden test suites, and reference solutions Ensure every task passes automated validation before approval Required Qualifications Professional software engineering experience with substantial private codebases Strong testing instincts: able to write suites that verify solutions the way a careful reviewer would Clear technical writing Company Description AfterQuery is a research lab investigating the boundaries of artificial intelligence through novel datasets and experimentation. We're backed by top investors, including Y Combinator and Box Group, and support all leading AI labs.

Author original coding tasks, maintainer-style issues, and reference solutions based on private codebases. Ensure all submissions pass automated validation to help train and evaluate advanced AI coding agents.

Requires professional software engineering experience with substantial private codebases and strong technical writing skills. Candidates must possess strong testing instincts to create rigorous verification suites.

• Exceptional Pay • Fully Remote • Flexible Schedule

Identified from the job description. Confirm important requirements above.

• Full Stack Engineering
• Technical Writing
• Software Testing
• Test Suite Development
• AI Evaluation
• Codebase Management

• Software
• Technology
• Engineering
• Science & Research
• Data & Analytics

Minimum experience

5+ years

Apply by

Aug 28, 2026

Posting language

English

Working hours

40 hours per week

Location requirements

Country, Toronto, Ontario, Canada

Seniority

Mid-Senior level