Head of AI Research

Exa is building a search engine from scratch to serve every AI application. We build massive-scale infrastructure to crawl the web, train state-of-the-art embedding models to index it, and develop super high performant vector databases in rust to search over it. We also own a $5m H200 GPU cluster and routinely run batchjobs with 10s of thousands of machines. This isn't your average startup : )

On the ML team, we train foundational models for search. Our goal is to build systems that can instantly filter the world's knowledge to exactly what you want, no matter how complex your query. Basically, put the web into an extremely powerful database.

We're seeking a Head of AI Research to repeatedly define our research direction and then achieve it. This role involves leading and growing a world-class research team and also doing significant amount of research toward extremely powerful ML systems for search.

Desired Experience

4+ years of AI research experience in industry or university

Track record of breakthrough research in language models or information retrieval

Deep expertise in transformers, large-scale distributed training, or embedding models

This is an in-person opportunity in San Francisco. We're happy to sponsor international candidates (e.g., STEM OPT, OPT, H1B, O1, E3).

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