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 Ent's data protection layer on the device: classifying sensitive data, tracing how it moves, and enforcing policy at the moment of egress — including to AI tools and agents. This role pairs classic content inspection with Ent's on-device small language model, so enforcement reflects what a person is trying to do and not only what a file contains. Precision is the product here.
What they're looking for
- 5+ years shipping production systems software in C/C++, including work on an endpoint agent deployed at enterprise scale
- Direct experience building or operating an endpoint for insider-risk, data-security, or CASB/SASE data-protection product
- Strong operating system internals knowledge on at least one platform: file system filtering, process and handle interception, and the user/kernel boundary
- Hands-on content inspection and data classification work: pattern-based detection, fingerprinting and hashing schemes, file format parsing, and handling of archives and Office/PDF container formats
- Experience controlling device and network egress channels — USB and removable media, print, clipboard, HTTPS upload
- Multi-threaded, performance-sensitive engineering against measured latency and throughput budgets
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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