Member of Technical Staff - Data Quality Engineer (Post-training)
ReflectionSan Francisco, California, United States • New York, New York, United States • London, England, United Kingdom
Posted January 8, 2026
Full Time
About the Company
We're a small talent-dense team building open superintelligence and making it accessible to all.
Job Description
We're looking for a Data Quality Engineer to ensure that the data used to train and evaluate our models meets a high bar for quality, reliability, and downstream impact. As a member of the Data Team, you will directly shape how our models perform on critical capabilities — agentic tool use, long-horizon reasoning and robust safety alignment.
Requirements
- Strong engineering fundamentals
- Experience building data pipelines, QA systems, or evaluation workflows
- Detail-oriented with an analytical mindset
- Solid understanding of how data quality impacts training and evaluation
- Experience designing and validating automated quality checks
- Proficiency in Python and building ML/LLM workflows
- Experience working with large datasets and automated evaluation or quality-checking systems
- Familiarity with how LLMs work and can describe how models are trained and evaluated
- Excellent communication skills
Benefits
- Top-tier compensation
- Comprehensive medical, dental, vision, life, and disability insurance
- Fully paid parental leave for all new parents
- Financial support for family planning
- Paid time off when you need it
- Relocation support
- Lunch and dinner provided daily
- Regular off-sites and team celebrations