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Cylake

AI-powered on-prem security platform for government

Endpoint Engineer

Systems Software EngineeringConfirmed live in the last 24 hours
Full-timeSunnyvale, CA, USA$150k - $250k /yrIn-person

About the Job

Requirements

  • At least 5 years of experience in systems-level programming and architecting highly concurrent applications.
  • Strong Rust programming skills focused on high-performance, low-level operating-system integrations.
  • Deep understanding of Windows operating-system internals, including Event Tracing for Windows, inter-process communication, Named Pipes, and Windows Services.
  • Experience with cross-platform endpoint telemetry collection using Linux extended Berkeley Packet Filter and macOS Endpoint Security Framework.
  • Proven experience in dynamic binary instrumentation, user-mode application programming interface interception, and process injection.
  • Experience designing and optimizing low-overhead threat-detection heuristics directly on the endpoint.
  • Knowledge of Windows kernel-mode components, specifically designing File Filter Drivers for data-in-motion tracking.
  • Experience architecting resilient distributed systems with offline disk spooling and secure mutual Transport Layer Security synchronization.
  • Understanding of offensive and defensive endpoint-security concepts, anti-tampering mechanisms, and process protection.
  • Experience building highly reliable agent lifecycles, self-healing architectures, and fail-safe rollback mechanisms.
  • Strong communication and documentation skills.

Responsibilities

  • Build the core endpoint security agent from the ground up, providing visibility and protection across Windows, Linux, and macOS.
  • Architect a lightweight, resilient agent capable of deep operating-system introspection, autonomous threat prevention, and offline telemetry spooling.
  • Address challenges in user-mode hooking, kernel-level behavioral analysis, anti-tampering, and distributed-systems design to deliver a high-performance security client.

Desired Qualifications

  • Experience with Microsoft Anti-Malware vendor registration, including Early Launch Anti-Malware and Protected Process Light.
  • Experience with browser extension development or Document Object Model hooking.

About the Company

Cylake

AI-powered on-prem security platform for government

Cylake builds an AI-native security platform designed for government agencies and highly regulated enterprises that cannot use public cloud. It provides on-premises and private-cloud appliances that collect enterprise data into a single data lake to support detection, investigation, and AI-powered workflows without phoning home. The platform is operated entirely within customers’ environments, using local data storage and processing to maintain control and compliance. Cylake differentiates itself through deep government/regulated focus, a leadership team with experience from Palo Alto Networks and SentinelOne, and a cloud-free approach that keeps data and analytics inside customer premises. The company aims to reach beta in late 2026 and general availability in 2027, backed by significant venture funding to develop the platform and expand the team.

Company size
11-50
Company stage
N/A
Total funding
$290M
Headquarters
Sunnyvale, CA
Founded
2026

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