Horizon3.ai
Senior Software Engineer, Browser Automation
US, Remote · Senior · Full-time
Sponsorship not specified$169k-$208kDetected 29 days ago
JavaScriptTypeScriptNode.jsRESTWebSocketsLLMsCybersecuritySeleniumPlaywrightCollaboration
About the role
- NodeZero has been adopted by organizations of all sizes, from small educational institutions to government agencies and Global 100 enterprises.
- It crawls and attacks real production websites the way a skilled human pentester would, finding broken access control, injection, XSS, and more, under a strict production-safe, no-false-positives mandate.
Requirements
- You have battle-tested experience with LLMs in production.
Nice to have
- Experience with agentic browser frameworks (Stagehand, Browser Use, or similar) or building LLM-in-the-loop automation.
- Background in web application security or offensive tooling - familiarity with broken access control, IDOR/BOLA, SQLi, XSS, SSRF, or SSTI in the wild.
- Familiarity with graph data models (e.g., Neo4j) for representing application structure.
- Experience with large-scale crawling, endpoint discovery (e.g., parsing/analyzing client-side JS), or session/credential management for automated access.
- Comfort working in an environment where correctness against a live customer system is a hard, non-negotiable constraint.
Skills
- Get to Know Us
- It is used by ITOps/SecOps teams, consulting pentesters, and MSSPs and MSPs.
- Advance our browser-driven crawler using Playwright and Stagehand.
Compensation
- We offer competitive salary, equity and benefits.
- At Horizon3, we believe that our people are our greatest asset, and our compensation philosophy reflects this core value.
- We are committed to fostering an environment where all employees feel valued, respected, and rewarded for their contributions.
- Our compensation structure is designed to be fair, competitive, and transparent, ensuring that every team member is recognized and compensated equitably across roles, levels, and locations.
- In accordance with various State's transparency regulations, we provide the following salary range information for this position:
- $169,000 - $208,000 annually.
Benefits
- Our benefits include health, vision & dental insurance for you and your family, a flexible vacation policy, and generous parental leave.
- All full-time roles are eligible for an equity package in the form of stock options.
Company info
- Work in a collaborative environment that encourages creativity and out-of-the-box thinking.
Equal opportunity
- Our commitment to diversity and inclusion means we strive to attract, develop, and retain a workforce that reflects the varied communities we serve.
- equal opportunity employer - we are a community that values diversity, equity, and inclusion as fundamental principles of our culture and success.
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This listing is sourced directly from Horizon3.ai's careers page and normalized into a canonical job model.