Posted Sep 13, 2026

[Remote] Senior Back End Engineer

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Note: The job is a remote job and is open to candidates in USA. Horizon3.ai is a remote cybersecurity company that develops the NodeZero platform for autonomous penetration testing and security assessment operations. The Senior Back End Engineer will join the Platform Integration team to build ETL features, GraphQL APIs, and integrations that support scalable data processing and customer workflows. The role also involves contributing production code, collaborating with frontend teams, and mentoring other engineers.


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Company Overview

  • Horizon3.ai offers an autonomous penetration testing platform that helps organizations proactively find and fix security vulnerabilities. It was founded in 2019, and is headquartered in San Francisco, California, USA, with a workforce of 201-500 employees. Its website is https://www.horizon3.ai.

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