Ent is the intent-aware AI endpoint — reading human, AI, and app activity in real time to tell normal work from risky action and act at the moment of risk. Backed by Sequoia and Felicis.
About the role
We are seeking an Endpoint Engineer to be part of the team that owns the Linux sensor at the core of Ent's EDR capability. This role builds detection and prevention on eBPF, LSM, and the audit subsystem, across the range of Linux customers actually run — workstations, servers, containers, and cloud workloads. You will own the tradeoffs between detection efficacy, false positives, and performance, and defend them with measured data.
What they're looking for
- 10+ years designing, building, and delivering production C/C++ (or Rust) systems software, a substantial portion of it in endpoint security, OS internals, or comparable performance-critical native code
- Deep working knowledge of operating system internals: process and thread lifecycle, memory management, file systems, drivers or kernel extensions, and IPC
- Hands-on production experience with eBPF
- Demonstrated experience building or operating an EDR, EPP, XDR, or AV product, or equivalent detection-and-response engineering
- Practical fluency in attacker TTPs, you can reason about what an attack looks like in raw telemetry, not just in a written report
- Strong low-level debugging skills, performance tracing, and crash-dump analysis
More about this role
Ent is the intent-aware workspace security platform for securing human and AI-driven work. Built to protect productivity, the new attack surface, Ent understands not just what users and agents do but why, and intervenes at the moment of risk before incidents occur. Where existing tools see events, Ent sees intent, so security teams can step in at the moment of risk instead of investigating days later. Founded by Lou Manousos and Brandon Dixon, co-founders of RiskIQ (acquired by Microsoft) and the team behind Microsoft Security Copilot, Ent is in production with Global 2000 customers across hospitality, financial services, and defense, and backed by Decibel, Sequoia, Crosspoint Capital, Craft Ventures, Shield Capital, Felicis, and In-Q-Tel. We’re now hiring the team that will define this category.
Customer first. The product and the business are built around problems we’ve watched real security teams struggle with — not the other way around. Every roadmap conversation starts with what a CISO told us last week.
Humble. No drama. We hire people who share the mission and trust each other to deliver. Teamwork over showmanship. Accountability over politics. The work speaks louder than...
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