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
Ent runs a single lightweight agent on machines we do not control. This role owns the evidence that the agent behaves correctly on real hardware across Windows, macOS, and Linux — the integration, performance, and reliability testing that stands behind every release decision.
What they're looking for
- 6+ years in software test, SDET, or quality engineering, including substantial ownership of test infrastructure end to end — framework, CI, and reporting.=
- Built a device, integration, or cross-platform test harness from scratch and carried it through to a trusted, gating state
- Depth in operating-system behavior on at least two of Windows, macOS, and Linux: process and resource accounting, install lifecycle, and agent- or driver-level runtime behavior
- Strong Python (pytest), and able to read and wire C/C++ and Rust test suites into CI
- Comfortable running large test fleets across virtualized environments, and working in CI systems — gating, parallelization, and artifact management
- A track record of making CI trustworthy: reducing regression-suite runtime, or converting unreliable, non-gating suites into gates engineers actually rely on
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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