# Head of Security at Exa

- Company: Exa
- Status: Open
- Workplace: On-site
- Location: San Francisco, California
- Level: Principal
- Discipline: Security
- Employment: Full-time
- Salary: $250K–350K
- Posted: 2026-09-01
- Skills: Engineering
- Apply: https://jobs.ashbyhq.com/exa/37599c13-47f8-40d7-b37f-9fc9e5329134

## Description

ABOUT EXA


Exa is an applied AI lab building a search engine unlike the world has ever seen. We build massive-scale infra to crawl the entire web, train state-of-the-art embedding models to process it, and design super high performant vector databases to retrieve over it. We now power search for Cursor, Cognition, HubSpot, and over 400,000 developers and have raised $350m from Lightspeed, Benchmark, and a16z.

Our ultimate goal is to build perfect search over all the world's information, far beyond Google. If you want to build massive-scale ML systems that will define the way the new AI world consumes information, this is the place for you.



What You’ll Own

 - Define Exa’s company-wide security strategy, operating model, risk framework, and multiyear roadmap.

 - Establish Exa’s security posture and risk appetite in partnership with the founders and executive team.

 - Provide leadership with clear, decision-ready assessments of material risks, incidents, investments, and tradeoffs.

 - Own security architecture and engineering across Exa’s products, APIs, web-scale data pipelines, cloud environments, Kubernetes clusters, model-training systems, GPU infrastructure, and internal platforms.

 - Protect customer data, proprietary models, training data, source code, credentials, and other high-value assets from external attacks, insider threats, supply-chain compromise, and misuse.

 - Build security into the product-development lifecycle through threat modeling, architecture reviews, secure defaults, automated controls, vulnerability management, offensive testing, and engi

More Exa roles: https://deviantjobs.com/companies/exa