Research Scientist – Frontier Data — AfterQuery

David Joseph & Company is partnering with AfterQuery, a company focused on building training data infrastructure for frontier AI labs. They are seeking a hands-on Research Scientist to design experiments that improve AI systems, focusing on model behavior, data quality, and evaluation design.

Responsibilities:

• Designing high-signal datasets and identifying model failure modes
• Data slicing strategy, benchmark design, and evaluation framework construction
• Reward signal design, RLHF pipeline support, and RLVR experimentation
• Annotator behavior modeling and dataset diversity measurement
• Alignment capability measurement and quantitative experimentation
• Translating frontier lab training objectives into concrete datasets
• Fast experiment iteration under ambiguity across domains including finance, software engineering, enterprise workflows, and policy-related reasoning