Endpoint Engineer

Cylake; Sunnyvale (CA); On-site; USD 150,000 - 250,000; Full time

Job summary

Cylake is seeking a technical leader to architect and build a cross-platform endpoint security agent for Windows, Linux, and macOS. You will focus on high-performance, low-overhead OS integrations, including user-mode hooking and kernel-aware components, with offline telemetry and secure mTLS synchronization.

You will tackle complex challenges in anti-tampering, distributed systems design, and self-healing agent lifecycles.

Qualifications

• 5+ years in systems-level programming and architecting concurrent applications.
• Strong Rust with low-level OS integrations.
• Experience with Windows internals (ETW, IPC, Named Pipes, Services).

Responsibilities

• Architect and build the core endpoint security agent for Windows, Linux and macOS.
• Deliver high-performance, secure client with offline telemetry spooling and robust fail-safes.

Skills

Systems-level programming

Rust

Windows internals

Linux eBPF

macOS ESF

Dynamic binary instrumentation

User-mode API interception

Process injection

Threat-detection heuristics

Windows kernel drivers

Distributed systems

mTLS synchronization

Anti-tampering concepts

Agent lifecycles/self-healing

Documentation

ELAM/PPL knowledge

Browser extension/DOM hooking

Job description

Your Impact

Join a small team building the next generation of cybersecurity products from the ground up. Led by industry veterans with a proven track record of success - you will get to architect, build, and deliver hugely impactful products with this world class team. You will have the opportunity to grow your career and skills along with the company from the very start.

Role Overview

You will serve as a technical leader responsible for building our core endpoint security agent from the ground up, providing comprehensive visibility and protection across Windows, Linux, and macOS. You will architect a lightweight, highly resilient agent capable of deep OS introspection, autonomous threat prevention, and sophisticated offline telemetry spooling. You will tackle complex challenges in user-mode hooking, kernel-level behavioral analysis, anti-tampering, and distributed systems design to deliver a seamless, high-performance security client.

Required Experience

• 5+ years of experience in systems-level programming and architecting highly concurrent applications
• Strong Rust programming skills with a focus on high-performance, low-level OS integrations
• Deep understanding of Windows OS internals, including ETW, IPC, Named Pipes, and Windows Services
• Experience with cross-platform endpoint telemetry collection utilizing Linux eBPF and macOS ESF
• Proven experience in dynamic binary instrumentation, user-mode API 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 mTLS 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
• Experience with Microsoft Anti-Malware vendor registration (ELAM, PPL) is a plus
• Experience with browser extension development or DOM hooking is a plus

We offer competitive compensation and a comprehensive benefits package designed to support our employees’ health, well-being, and long-term success. The expected salary range for this position is $150,000 - $250,000 per year. Within this range, individual pay is determined based on job-related factors including skills, experience, qualifications, and internal equity. Most candidates can expect an offer within the range listed above. Your recruiter will provide additional details on compensation and benefits to qualified candidates during the hiring process.

We’re committed to building a diverse, inclusive workplace where everyone can do their best work. We are proud to be an equal opportunity employer and do not discriminate on the basis of race, religion, color, national origin, sex, sexual orientation, age, veteran status, disability, genetic information, or other applicable legally protected characteristic. If you require a reasonable accommodation during the application or interview process, please let us know - we’re happy to support you.