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San Francisco, California, United States
Onsite
Available
HUD's mission is to build reliable, fair and open infrastructure for AI data. We want data to be valuable for the people who create it and trustworthy for the labs that train on it. Our team is a quickly growing group of researchers, engineers and operators building the economy that shapes what AI will become. Backed by $16M from top VCs and YC (W25), our marketplace and platform are used by startups, Fortune 500 companies and frontier labs.
We’re looking for a Lead Research Engineer, Data Quality to own how HUD measures, improves, and scales the quality of training data for frontier agents. You’ll lead the data quality team in building the systems that evaluate thousands of tasks across RL environments, synthetic data, benchmarks, and domain-specific workflows.
Lead HUD’s data quality strategy including building QC systems, defining and enforcing quality standards, and designing experiments to grade agent outputs
Develop new methods for validating synthetic data at scale, such as failure-mode analysis, task mutation checks, and trajectory auditing
Partner with research engineers, domain experts, and data vendors to diagnose quality issues and improve data generation workflows
Turn qualitative research insights into production systems, internal tools, dashboards, validation pipelines, and feedback loops
Help build internal research taste around what makes agent training data actually useful, not just superficially correct
Mentor other research engineers to maintain a high bar for technical rigor, clarity, and execution speed
You may be a good fit if you have:
Advanced proficiency in Python, Docker, and Linux environments
Deep intuition for data quality - you can reason about what makes tasks realistic, learnable, diverse, reliable, and useful for training
Experience building QC systems, evals, benchmarks, synthetic data pipelines, validation workflows, or model evaluation infrastructure
Comfort working across messy human and technical systems, including domain experts, vendors, generated data, model outputs, graders, and infrastructure
Strong written communication and the ability to explain methodology clearly to researchers, engineers, labs, and external audiences
Strong candidates may also have:
Experience leading teams on ambiguous technical projects from problem definition through implementation and iteration
Experience working with subject-matter experts to capture domain judgment and convert it into scalable review or generation systems
Be comfortable designing metrics, experiments, and QA/QC processes, not just executing them
Early-stage startup experience with ability to work independently in fast-paced environments
Be detail-oriented and able to spot subtle inconsistencies or edge cases in data
Team Size: ~25 people currently, mostly full-time in-person, but some remote.
Our team: Our team brings together five International Olympiad medalists across IOI, ILO and IPhO, researchers published at NeurIPS and ICLR, and engineers and researchers from Google DeepMind, Amazon, AWS, Meta, Qwen, GLM, and Mercor. It also includes operators from BCG and Uber, the first security hire at one of the largest crypto exchanges, serial AI startup founders, former quant researchers, artists and the former #1 ranked Catan player in the world.
Company stage: We have 8 figures in funding and are scaling profitably and quickly to meet very strong demand.
Employment: Full-time.
Location: We have offices in San Francisco or Singapore but are open to remote candidates who can work hours that 70-80% overlap with either San Francisco or Singapore time zones.
Visa Sponsorship: We provide support for relocation and visas for strong full-time candidates to the US or Singapore.
Timeline: Applications are rolling. The process is 2 technical interviews and a 2-3 day work trial.
Competitive compensation
100% covered top-of-the-line medical, dental, and vision (US and Singapore employees)
Lunch and dinner for in-office employees
Company-wide holiday break (Christmas Eve to New Year’s Day) on top of PTO and paid holidays
401k with a 4% match
Other perks including an Equinox membership and commuter benefits (US employees) and a health/wellness stipend (Singapore employees)
Unlimited* access to tokens for ChatGPT, Claude Code, Cursor, etc. *By unlimited, we mean no one on our token usage leaderboard has ever hit a limit. So we have no idea what the limit is.
Two top-floor offices in San Francisco’s Union Square and Singapore’s Raffles Place
Annual travel budget to visit either office
Actual offers are adjusted for experience and location, but our base salary bands are
San Francisco (and other major US cities): $200,000 - $295,000
Singapore: $150,000 - $225,000
Rest of world: $120,000 - $225,000
Due to high volume, we may not actively respond to every application, but feel free to contact us at recruiting@hud.so or elsewhere if we missed your application!
