Hiring: Member of Technical Staff, Data Flywheel Company: Reflection Location: New York, NY Job Posted Time: 2026-09-16 13:40:13 Target Skills & Keywords : LLM, Machine Learning, Reinforcement Learning About the job Required Skills: •The Data Flywheel team closes the gap between benchmark performance and useful performance in the real world. We identify and build the signals, data, and feedback loops that turn model usage into rigorous evaluations, targeted training data, and measurable improvements in future generations of models. •Identify high-value data sources and partnership opportunities, deeply understand the underlying use cases, and translate them into representative evaluations •Bring new data sources online, from initial partner conversations and data scoping through quality validation and integration into production evaluation and training pipelines, where appropriate •Design and build evaluations, graders, and feedback loops that make priority real-world model behaviors measurable •Analyze model performance and failure modes, then translate those insights into targeted datasets, reward signals, and training interventions •Develop human and synthetic data strategies for capabilities where existing data is insufficient, including designing and running evaluation and data-collection programs with vendors •Build the infrastructure and pipelines needed to ingest, inspect, version, and evaluate data reliably at scale •Collaborate closely with pre-training, post-training, applied, and partnership teams to turn new signals into measurable model improvements Compensation: •Top-tier compensation: Salary and equity structured to recognize and retain our talent globally Interested candidates, please apply directly through the job posting on company's career page or try via AI auto apply on this platform. Don't miss this opportunity to join a forward-thinking team!