Endpoint Engineer building Ent’s endpoint data-protection layer for enterprise workspace security. Classifying sensitive data, controlling exfiltration channels, and integrating on-device intent intelligence.
Responsibilities
Build Ent's endpoint data-protection layer to classify sensitive data, trace its movement, and enforce policy at egress
Instrument and control exfiltration channels including USB, printing, clipboard, drag-and-drop, screen capture, network shares, Bluetooth/AirDrop, email, browser uploads, sync clients, and AI tools or agents
Implement on-device content inspection and classification using patterns, keywords, dictionaries, document matching, fingerprinting, file and structure identification, and OCR
Integrate Ent's on-device small language model into classification and intent decisions
Build data lineage and provenance tracking across copying, renaming, transformation, archiving, compression, and re-encoding
Implement interception plumbing using Windows minifilters and ETW, macOS Endpoint Security Framework and Network Extensions, Linux fanotify and eBPF, and browser extension hooks
Build labeled corpora, measure detector false-positive and false-negative rates, and tune classification quality
Budget CPU, memory, and I/O for content scanning without blocking, delaying, or corrupting legitimate workflows
Produce forensic incident evidence covering who, what data, channel, and intent
Own customer escalations involving missed egress paths and application-compatibility conflicts, converting recurring patterns into permanent fixes
Partner with product, security research, AI, and compliance stakeholders to map endpoint controls to GDPR, HIPAA, PCI DSS, CCPA, and export-control requirements
Requirements
5+ years shipping production systems software in C/C++
Experience with an endpoint agent deployed at enterprise scale
Direct experience building or operating an endpoint insider-risk, data-security, or CASB/SASE data-protection product
Strong operating system internals knowledge on at least one platform
Experience with file system filtering, process and handle interception, and the user/kernel boundary
Hands-on content inspection and data classification experience
Knowledge of pattern-based detection, fingerprinting and hashing schemes, file format parsing, archives, and Office/PDF container formats
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