OpenTrain is hiring a Web Research Benchmark Designer to create challenging, objectively verifiable research questions and detailed evidence trails for evaluating frontier AI browsing agents. Candidates must have native or near-native written English, a master's degree or over three years of relevant investigative research experience, and a background in LLM evaluation, red-teaming, or benchmark construction. The position is a remote, worldwide, part-time contract requiring at least 20 hours per week.