Staff Software Engineer, OTA Services
Company: Horizon3
Location: US, Remote (Remote)
Salary: $229.5k - $260k per year
Type: Full-time
Remote: Yes
Posted: 2026-10-23
About this role
Get to Know Us
[Horizon3](http://Horizon3.ai) is a fast-growing, remote cybersecurity company dedicated to the mission of enabling organizations to proactively find, fix and verify exploitable attack vectors before criminals exploit them. Our flagship product, the NodeZero™ platform, delivers production-safe autonomous pentests and other key assessment operations that scale across the largest internal, external, cloud, and hybrid cloud environments. NodeZero has been adopted by organizations of all sizes, from small educational institutions to government agencies and Global 100 enterprises. It is used by IT Ops/SecOps teams, consulting pentesters, and MSSPs and MSPs.
We are a fusion of former U.S. Special Operations cyber operators, startup engineers & operators, and formerly frustrated cybersecurity practitioners. We're committed to helping solve our common security problems: ineffective security tools and false positives, resulting in alert fatigue, blind spots, "checkbox" security culture, cybersecurity skills shortage, and the long lead time and expense of hiring outside consultants. Collectively, we are a team of learn-it-alls, committed to a culture of respect, collaboration, ownership, and results.
As a remote first company, we require minimum 25Mbps consumer grade broadband connection.
What You'll Do
The Expert Engineer on the OTA Services team is the technical anchor for how NodeZero updates itself across thousands of customer deployments — without customer intervention, without downtime, and without introducing new vulnerabilities in the process. NodeZero runs as a container inside customer infrastructure. When a new image is ready, the OTA system has to find every deployed instance, negotiate the update, deliver it safely, validate it, and roll back gracefully if something goes wrong. Getting that right at scale, across diverse customer environments including air-gapped and restricted networks, is a genuinely hard systems problem.
This is a ...