Senior Backend Engineer, Autonomous Defense is open at Horizon3ai in US, Remote. The posting gives a salary of $170K - $235K. Posted on Sep 14, 2026, and still on Horizon3ai’s careers page when we last checked, on Nov 14, 2026.
About the role
As a Senior Backend Engineer on the Autonomous Defense team, you'll build the platform that NodeZero's defensive agents run on. Our AI researchers define what these agents should reason about, you build the systems that make that work in production, across thousands of customer tenants, without breaking anything. That means real distributed systems problems, not glue code. They execute inside customer environments…
The opening lines of the posting. The rest is on Horizon3ai’s careers page.
Hiring at Horizon3ai
Horizon3ai has 200 open roles right now, 152 of them remote. Most are in Engineering, Sales & Business Development and Marketing & Community. The median advertised salary across its roles with a published range is $230K. See all its roles
