Full Stack Engineer - AI Trainer

AfterQuery is seeking Full Stack Engineer Experts to build and evaluate the production-quality full stack application work scenarios that frontier AI labs use to test model judgment. In this remote, asynchronous role you will design realistic engineering problems, review how models reason through them, and give detailed feedback that makes the resulting training data trustworthy. Why Apply Competitive Compensation: $70-$85/hour, paid weekly Innovative Impact: Join a YC-backed research lab shaping how frontier models reason about software Flexible Engagement: Fully remote and asynchronous, on your own schedule Responsibilities Design challenging, realistic production-quality full stack application work tasks drawn from production practice Evaluate model responses for correctness, sound reasoning, and subtle failure modes Document your reasoning clearly so another engineer can audit the judgement Required Qualifications Professional experience building and shipping full stack web applications Proficiency with a modern framework such as Next.js, plus SQL schema design Comfort owning a feature from data model through interface About AfterQuery AfterQuery is a research lab investigating the boundaries of artificial intelligence through novel datasets and experimentation. We are backed by top investors, including Y Combinator and Box Group, and support all leading AI labs.