Senior Software Engineer, Design

About HUD

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.

About the role

We’re looking for a Full-Stack Software Engineer with a front-end and design focus to build features across HUD’s products, from user interfaces to the APIs and backend logic that support them. You’ll own features end to end, work closely with other engineers and researchers, and use feedback from users to guide what you build.

Responsibilities

• Build and ship features across HUD’s platform and marketplace, owning front-end interfaces, API integration, and supporting backend logic

• Build interfaces and data visualizations that make agent runs, evaluation results, reward signals, and quality feedback understandable and actionable

• Work with other engineers and researchers to translate complex RL and evaluation workflows into reliable product features

• Talk with users, observe where they struggle, and use what you learn to improve the product

• Develop reusable UI components and interaction patterns, with a high bar for usability, visual quality, performance, and maintainable code

Experience

You may be a good fit if you have:

• Full-stack engineering skills, including building APIs, working with data models, and implementing backend logic

• Strong front-end engineering skills and product and interaction design judgment, especially for complex tools or workflows

• A record of shipping and maintaining product features end to end, learning from users, and improving what you built

• The ability to understand technical concepts well enough to present them clearly to users

• Good engineering judgment about implementation tradeoffs, including when to ship quickly and when to invest in robustness or polish

• Clear communication and comfort working closely with engineers, researchers, and users

Strong candidates may also have:

• Experience building developer tools, data-rich products, or research software

• Familiarity with AI agents, evaluations, reinforcement learning, or training data

• Experience building reusable component libraries or design systems as a product grows

• Experience working independently in an early-stage company

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: ~25 people currently, mostly full-time in-person, but some remote.

• Our team: Our team includes 4 International Olympiad medalists (IOI, ILO, IPhO), the former #1 ranked Catan player in the world, 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.

Logistics

• 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.

What we offer

• 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

Compensation

Actual offers are adjusted for experience and location, but our base salary bands are

• San Francisco (and other major US cities): $130,000 - $225,000

• Singapore: $100,000 - $170,000

• Rest of world: $100,000 - $170,000

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!