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Research Engineer

Hud

UShybridAI

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About this role

ABOUT HUD

HUD https://www.hud.ai/ is building infrastructure to create RL training data and evals for frontier AI agents, as well as a marketplace to sell these to frontier labs through the HUD marketplace. Our platform is used by frontier labs, Fortune 500 companies, and startups. We’ve raised $15M from top VCs and were YC W25.

ABOUT THE ROLE

We're looking for research engineers to help build out QA for training data created by companies using HUD’s infrastructure. You’ll build the systems that scale quality to help us meet our continued strong demand.

RESPONSIBILITIES

- Create QA/QC systems based on true understanding and human judgement, without relying heavily on LLMs

- Define and enforce quality standards for training data

- Design experiments and metrics to grade agent outputs

- Partner with data vendors to debug quality issues and diagnose agent failure modes, provide actionable feedback, and improve their data generation processes

- Translate QA/QC learnings into systems for auditing supplier-generated datasets, including sampling strategies, validation pipelines (rule-based and model-assisted), and feedback loops

- Continuously integrate QA/QC learnings into infrastructure tools and data vendor portal to reduce anomalies, inconsistencies, and edge cases

EXPERIENCE

You may be a good fit if you have:

- Proficiency in Python, Docker, and Linux environments

- Strong understanding of what “good data” means and how to measure it

- Built scalable data validation pipelines and automated QA/QC systems end-to-end without a fully prescribed roadmap

- Experience working on benchmarks and evals - you can reason about what makes a task realistic, a rubric reliable, an environment usable, and a trajectory useful for RL training

- Startup experience in early-stage technology companies with ability to work independently in fast-paced environments

Strong candidates may also:

- Be detail-oriented and able to spot subtle inconsistencies or edge cases in data

- Be comfortable designing metrics, experiments, and QA/QC processes, not just executing them

- Have experience with existing benchmarks and can reason about how to construct tasks in new evals

- Thrive in unstructured problem spaces

- Strong communication skills for remote collaboration across time zones

We prioritize technical aptitude and learning potential over years of experience. Motivated candidates are encouraged to apply even if they don't meet all criteria.

TEAM & COMPANY DETAILS

- Team Size: ~15 people currently, mostly full-time in-person, but some remote.

- Our team: Our team includes 4 International Olympiad medalists (IOI, ILO, IPhO), serial AI startup founders, and researchers with publications at ICLR, NeurIPS, etc.

- Company stage: We have 8 figures in funding and high revenue growth. We’re scaling profitably and quickly to meet very strong demand.

LOGISTICS

- Employment: Full-time.

- Location: On-site in the San Francisco Bay Area.

- Visa Sponsorship: We provide support for relocation and visas for strong full-time candidates to the US.

- Timeline: Applications are rolling. The process is 2 technical interviews and a 1-week work trial.

WHAT WE OFFER

- Competitive compensation

- 100% covered top-of-the-line medical, dental, and vision from Blue Shield of CA

- Lunch and dinner when you’re in the office

- Company-wide holiday break (Christmas Eve to New Year’s Day) on top of PTO and paid holidays

- Other perks including an Equinox membership, 401k, and commuter benefits

- 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.

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!

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