Research Engineer, Synthetic Data

About HUDHUD'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.About the roleWe’re looking for Research Engineers to build our synthetic data pipeline. You’ll turn domain-specific workflows into synthetic training tasks that are realistic enough to enough to teach useful behavior, structured enough to generate at scale, and difficult enough to expand model capabilities.ResponsibilitiesWork with subject-matter experts to create synthetic tasks for training AI agents across a range of professional and technical domainsDesign synthetic task generation methods that produce diverse, realistic, and learnable tasksBuild systems and tooling to mutate, validate, and improve synthetic tasksAnalyze model and agent performance on synthetic tasks to understand what the tasks are teaching and where they failDevelop metrics to quantify and understand synthetic task diversity, realism, learnability, etc.ExperienceYou may be a good fit if you have:Proficiency in Python, Docker, and Linux environmentsHave experience with synthetic data research methods - please elaborate in your applicationStrong understanding of what “good synthetic data” means and its limitationsBuilt synthetic data pipelines end-to-end without a fully prescribed roadmapExperience working on environments, evals, and benchmarksStrong candidates may also:Be detail-oriented and able to spot subtle inconsistencies or edge cases in synthetic dataBe able to reason from first principles about task design, scoring, and failure modesThrive in unstructured problem spacesEarly-stage startup experience with ability to work independently in fast-paced environmentsStrong communication skills for remote collaboration across time zonesWe 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 detailsTeam Size: ~25 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 are scaling profitably and quickly to meet very strong demand.LogisticsEmployment: 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.What we offerCompetitive compensation100% covered top-of-the-line medical, dental, and vision (US and Singapore employees)Lunch and dinner for in-office employeesCompany-wide holiday break (Christmas Eve to New Year’s Day) on top of PTO and paid holidaysOther perks including an Equinox membership, 401k, 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 PlaceAnnual travel budget to visit either officeCompensationActual offers are adjusted for experience and location, but our base salary bands areSan Francisco (and other major US cities): $135,000 - $230,000Singapore: $100,000 - $175,000Rest of world: $100,000 - $175,000Due 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!