Senior Software Engineer, Windows Networking

About Us

Cloudflare is on a mission to help build a better Internet. The company runs one of the world's largest networks powering millions of websites and other Internet properties for customers ranging from individual bloggers to SMBs to Fortune 500 companies. Cloudflare protects and accelerates any Internet application online without adding hardware, installing software, or changing a line of code. Internet properties powered by Cloudflare route web traffic through its intelligent global network, improving performance and reducing spam and other attacks. Cloudflare has been recognized on Entrepreneur Magazine's Top Company Cultures list and Fast Company's Worlds Most Innovative Companies.

We hire curious and empathetic individuals committed to developing themselves and learning new skills. We are committed to building a diverse and inclusive team and hire the best people based on potential and support them throughout their time at Cloudflare. Come join us!

Locations :

Austin, TX

Lisbon, Portugal

London, United Kingdom

Seattle, WA

What you'll do

We're looking for a Senior Windows Software Engineer to join our Zero Trust team. You will work on the Zero Trust desktop client, which protects corporate devices by securely and privately sending traffic from those devices to Cloudflare's global network, where advanced web filtering and Zero Trust policies can be applied.

You will predominantly use Rust alongside platform-native languages & APIs to implement high-performance networking code that runs on multiple desktop platforms. You will be expected to improve code quality and build solid, testable and well-documented foundations. A strong understanding of Windows internals (virtual memory, multi-threading, process lifecycle, kernel programming, system APIs, etc.) and networking protocols (TCP / IP, UDP, DNS, QUIC, HTTP / 3, proxying, etc.) is helpful. You will also interact with languages such as Swift, C#, C, and Python.

As a Senior Software Engineer, you will contribute to the design and implementation of major development projects, working closely with product managers and other teams to implement customer-impacting features. You will tackle problems arising from the scale of Cloudflare's deployment while meeting stringent quality, performance, and security requirements.

Qualifications

• 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 with very high-quality and low-complexity code and thorough documentation
• Strong experience writing easily-testable and thoroughly-tested code (e.g., using dependency injection with proper abstractions)
• Experience with lower-level languages such as Rust , C , C++
• Confidence writing multithreaded, asynchronous code
• Strong experience debugging network-related problems
• Understanding of VPN technologies and related privacy, security, and anonymity trade-offs
• Knowledge of security protocols and standards
• Empathetic, proactive, and constructive communication skills , both verbal and written

Compensation & Equity

Compensation : Compensation may be adjusted depending on work location.

• For Colorado, Illinois, Maryland and Minnesota : Estimated annual salary of $137,000 - $167,000.
• For New York City, Washington, DC and California (excluding Bay Area) : Estimated annual salary of $154,000 - $167,000.
• For Bay Area : Estimated annual salary of $162,000 - $198,000.

Equity : This role is eligible to participate in Cloudflare's equity plan.

Benefits

Cloudflare offers a comprehensive package of benefits to support employees and their families. Benefits may vary by location. The below describes benefits for employees in the United States.

Health & Welfare Benefits

• 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

Financial Benefits

• Short and Long Term Disability Insurance
• Life & Accident Insurance
• 401(k) Retirement Savings Plan
• Employee Stock Participation Plan

Time Off

• Flexible paid time off covering vacation and sick leave
• Leave programs, including parental, pregnancy health, medical, and bereavement leave

This role may require on-call flexibility to address technical issues outside standard hours.

EEO & Accessibility

Cloudflare is proud to be an equal opportunity employer and is committed to diversity and inclusiveness. All qualified applicants will be considered for employment without regard to race, color, religion, sex, gender identity or expression, sexual orientation, national origin, age, disability, or any other basis protected by law. We are an AA / Veterans / Disabled Employer. Cloudflare provides reasonable accommodations to qualified individuals with disabilities. If you require an accommodation to apply, please contact hr@ or mail to 101 Townsend St., San Francisco, CA 94107.

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