Help grow and harden our browser automation and crawling engine, which is the layer that discovers, navigates, and interacts with target applications before and during an autonomous pentest.
Advance our browser-driven crawler using Playwright and Stagehand.
Extend our agentic login and authentication capabilities, including complex auth flows, MFA/TOTP, and credentialed access reliable enough to run unattended against customer environments.

Who you are:

Experience building production software, with deep, hands-on experience in browser automation (Playwright, Puppeteer, or Selenium) against real, non-trivial web applications.
Strong TypeScript / Node.js skills and comfort living inside the headless-browser stack, including Chromium internals, the Chrome DevTools Protocol, network interception, the DOM, and JS execution contexts.
A bias toward determinism and debuggability, and the judgment to reach for an LLM only when a deterministic approach genuinely can't do the job.

Why Horizon3.ai:

Work in a collaborative environment that encourages creativity and out-of-the-box thinking.
Benefit from hybrid and remote work models with a flexible vacation policy and generous parental leave.
Enjoy competitive compensation including salary, equity, and comprehensive health, vision, and dental insurance.

Horizon3.ai

Horizon3.ai is a fast-growing cybersecurity company that provides autonomous pentesting solutions via its NodeZero platform to help organizations find and fix attack vectors. The company is a fusion of former U.S. Special Operations cyber operators and startup engineers, fostering a culture of respect, collaboration, and ownership.

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