Founding Full Stack AI Engineer

Hub is a distributed AI data infrastructure company. We provide real-world training data to AI companies through a global network of 500,000+ contributors across 150+ countries and 100+ languages. We own the full end-to-end pipeline: collection, automated processing, human-in-the-loop QA, and delivery. Our clients are leading AI labs and top-tier technology companies who need original, hard-to-access multimodal data — audio, image, and video — that doesn't exist on the public web. **The vision:** make real-world data collection for AI as simple as an API call. * 500,000+ contributors · 150+ countries · 100+ languages * $2M raised · Y Combinator P26 * Clients: Top 10 US technology companies * HQ: Palo Alto, CA · 100% Remote # Who We're Looking For This role is not for everyone. We're a small team moving at YC batch pace. The work is real, the stakes are high, and there's no time to manage people. * **Ownership over excuses.** You see a problem, you fix it, you document it. You don't wait to be told. * **Speed without sloppiness.** You ship fast and you ship clean. You know when to cut and when not to. * **Async-first mindset.** You communicate proactively, write clearly, and never become a blocker because you're offline. * **Intellectually honest.** You rate yourself accurately. You say "I don't know" and then go find out. * **Builder identity.** You have things you've built that you're proud of — side projects, open source, internal tools. You build because you can't help it. * **Low ego, high standards.** You take feedback without flinching. You give it without politics. You care about the work, not the credit. # What You Bring You'll own both ends of the stack. You design and ship the backend APIs that process data from half a million contributors. You build the React interfaces that internal teams and clients actually use. You don't wait for someone to spec things out — you identify the problem, design the solution, and ship it. **Requirements:** * 3+ years of professional full stack engineering experience in production environments * Strong Python skills and hands-on experience building and deploying production APIs with FastAPI * Solid React experience — you've shipped real products used by real users, not just demos * Deep command of SQL — you write and review complex queries, you spot slow ones, you fix them * Hands-on PostgreSQL experience: indexing, query plan analysis, partitioning, connection pooling, schema design at scale * Experience with background task processing systems (Celery, RQ, SQS, or equivalent) * Familiarity with object storage (S3-compatible), containerization (Docker), and REST API design principles * Ability to own features end-to-end: backend logic, database schema, frontend interface, deployment # Key Responsibilities **1. Backend Development** Design and maintain FastAPI services powering Hub's data collection and delivery pipeline. Build APIs consumed by internal tools, contributor interfaces, and client-facing integrations. Own reliability, performance, and documentation. **2. Database Performance** Write, review, and optimize SQL queries for correctness and speed across high-volume datasets. Tune PostgreSQL performance: indexing, query plans, partitioning, connection pooling. Design schemas that scale with Hub's contributor network and project volume. **3. Frontend Development** Build and iterate on React interfaces for contributors, internal ops, and client-facing dashboards. Translate complex data workflows into clean, usable UI. Maintain performance and responsiveness across all surfaces. **4. Async Pipeline Architecture** Design and maintain background job systems that handle audio, image, and video file processing at scale. Own reliability and observability of async workflows. **5. Cross-Team Collaboration** Work closely with ML engineers, DevOps, and the data team to ship integrated features. Participate in architecture discussions and sprint planning. Contribute to internal tooling that accelerates team velocity. # What We Offer * A founding engineer role — your code runs in production pipelines used by top-tier tech companies * Competitive salary plus equity / token options at founding-level terms with meaningful upside * 100% Remote — work from anywhere in the world * High-ownership environment — your work ships fast and has direct business impact * Budget and time for continuous learning — courses, conferences, tools * Direct collaboration with an experienced, technical founding team backed by Y Combinator ### MANDATORY: FILL THIS FORM # **—> [https://hubxyz.notion.site/hub-founding-full-stack-engineer](https://hubxyz.notion.site/hub-founding-full-stack-engineer)** Visa sponsorship is offered for this role.