Senior Software Engineer, Zero Trust Client

Cloudflare

. Join Cloudflare’s Zero Trust team as a Senior Windows Software Engineer .

Posted 9/22/2026full-timeUnited StatesSenior💰 $185,000 - $254,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in Windows Internals, Kernel-Mode Programming, and Network Protocols, with a strong focus on developing high-performance, secure, and well-documented software solutions. Proficient in mentoring engineers and leading technical designs while ensuring code quality and effective communication across teams.

Highest-signal resume keywords

Windows InternalsKernel-Mode ProgrammingRust ProgrammingNetwork Driver DevelopmentDebugging Network Issues

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

RustCC++Multithreaded ProgrammingAsynchronous Code DevelopmentDependency InjectionSecurity ProtocolsNetwork ProtocolsCode ReviewTechnical Design Documentation

Soft Skills

Empathetic CommunicationProactive Problem SolvingConstructive Feedback

Industry Keywords

Zero TrustVPN TechnologiesQuality AssurancePerformance RequirementsExport-Control Authorization

Tech Stack

Tools & technologies

RustC++

About the role

Key responsibilities & impact

Join Cloudflare’s Zero Trust team as a Senior Windows Software Engineer
Work on the Zero Trust desktop client that securely and privately sends corporate-device traffic to Cloudflare’s global network
Use Rust, platform-native languages, and APIs to implement high-performance networking code across desktop platforms
Improve code quality and build solid, testable, and well-documented foundations
Make significant contributions to the design and implementation of major development projects
Work closely with product managers and other teams to implement customer-impacting features
Address problems driven by large-scale deployment and stringent quality, performance, and security requirements
Participate in code review, knowledge sharing, mentoring, and cross-team technical design coordination

Requirements

What you’ll need

In-depth knowledge of Windows internals, kernel-mode programming, and network protocols
Experience in low-level Windows driver development, ideally network drivers
Excellent programming skills and experience writing high-quality, low-complexity, thoroughly documented code
Strong experience writing easily-testable and thoroughly-tested code, including dependency injection and appropriate abstractions
Experience with lower-level languages such as Rust, C, and C++
Very comfortable writing multithreaded, asynchronous code
Strong experience debugging network-related problems
Understanding of VPN technologies and trade-offs between privacy, security, and anonymity
Good understanding of and experience with security protocols and standards
Experience mentoring engineers and raising a team’s technical bar through code review and knowledge sharing
Experience owning technical designs end-to-end and writing specifications and design documents
Track record of debugging and resolving complex issues spanning team and system boundaries
Empathetic, proactive, and constructive verbal and written communication skills
Ability to satisfy U.S. export-control authorization requirements without sponsorship for an export license, if applicable

Benefits

Comp & perks

Medical/Rx Insurance
Dental Insurance
Vision Insurance
Flexible Spending Accounts
Commuter Spending Accounts
Fertility & Family Forming Benefits
On-demand mental health support and Employee Assistance Program
Global Travel Medical Insurance
Short and Long Term Disability Insurance
Life & Accident Insurance
401(k) Retirement Savings Plan
Employee Stock Participation Plan
Flexible paid time off covering vacation and sick leave
Leave programs, including parental, pregnancy health, medical, and bereavement leave
Equity plan participation