Senior Backend Engineer, External is open at Horizon3ai in US, Remote. The posting gives a salary of $200K - $235K. Posted on Oct 19, 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 External Attack team, you'll contribute to the full set of backend services that power NodeZero's external pentesting capabilities, from architecture and development through deployment and production operations. You'll own parts of our core API, data processing and ETL pipelines, datalake, graph, along with the container orchestration and cloud infrastructure beneath it all…
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
