Senior Software Engineer, Windows Networking

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 be working on the Zero Trust desktop client, which protects corporate devices by securely and privately sending traffic from those devices to Cloudflare's global network, which can apply advanced web filtering and advanced Zero Trust policies.
In your role, you will predominantly be using Rust along platform-native languages & APIs to implement high-performance networking code that runs on multiple desktop platforms. You'll be expected to improve the code quality and to build solid, testable, and well-documented foundations. You will be most successful in this role if you have a good understanding of Windows internals (virtual memory, multi-threading, process lifecycle, kernel programing, system APIs, etc.) and networking protocols (TCP/IP, UDP, DNS, QUIC, H/3, proxying, etc.). You will also have to interact with other languages, such as Swift, C#, C, and python.
As a Senior Software Engineer, you will be expected to make significant contributions to the design and implementation of major development projects, working closely with our product managers and other teams to implement customer-impacting features. You will work on stimulating problems born out of the scale of our deployment, and the stringent quality, performance, and security requirements of our product.
Examples of desirable skills, knowledge, and experience

• 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 experience writing very high-quality and low-complexity code with thorough documentation.
• Strong experience writing easily-testable and thoroughly-tested code (e.g. using dependency injection with the right abstractions)
• Great experience using lower-level languages, such as Rust, C, C++
• Very comfortable writing multithreaded, asynchronous code
• Strong experience with debugging network-related problems
• An understanding of how VPN technologies work, and the trade-offs between privacy, security, and anonymity
• Good understanding of, and experience with, security protocols and standards
• Empathetic, proactive, and constructive communication skills, verbal and written

Compensation
Compensation may be adjusted depending on work location.

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

Equity
This role is eligible to participate in Cloudflare's equity plan.
Benefits
Cloudflare offers a complete package of benefits and programs to support you and your family. Our benefits programs can help you pay health care expenses, support caregiving, build capital for the future and make life a little easier and fun! The below is a description of our benefits for employees in the United States, and benefits may vary for employees based outside the U.S.
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 flexibility to be on-call outside of standard working hours to address technical issues as needed.