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About the Role

We are 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, applying advanced web filtering and Zero Trust policies.

Responsibilities

Implement high-performance networking code using Rust, platform-native languages, and APIs on multiple 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.
Work on stimulating problems born out of the scale of our deployment and stringent quality, performance, and security requirements.

Requirements

Good understanding of Windows internals (virtual memory, multi-threading, process lifecycle, kernel programming, system APIs, etc.).
Good understanding of networking protocols (TCP/IP, UDP, DNS, QUIC, H/3, proxying, etc.).
Ability to interact with other languages, such as Swift, C#, C, and Python.
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.
Experience mentoring engineers and raising a team's technical bar through code review and knowledge sharing.
Experience owning technical designs end-to-end, writing specs and design docs that coordinate work across engineers and teams.
A track record of debugging and resolving complex issues that span team and system boundaries.
Empathetic, proactive, and constructive communication skills, verbal and written.
Applicants may be asked to attend an in-person interview.
Position may require access to information protected under U.S. export control laws.
Offer of employment may be conditioned on authorization to receive software or technology controlled under U.S. export laws without sponsorship for an export license.

Skills

Rust
Platform-native languages & APIs
Windows internals
Networking protocols
Swift
C#
C
Python
Kernel-mode programming
Network drivers
Low-complexity code
Dependency injection
Multithreaded code
Asynchronous code
Debugging network-related problems
VPN technologies
Security protocols and standards

Location

Austin
Seattle

Work Type

Full-time

Experience Level

Senior

Salary/Compensations

For Seattle-based hires: Estimated annual salary of $185,000 -$254,000

Benefits

Equity
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

About the Company

Cloudflare runs one of the world’s largest networks that powers 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 have web traffic routed through its intelligent global network, which gets smarter with every request.
Cloudflare was named to Entrepreneur Magazine’s Top Company Cultures list and ranked among the World’s Most Innovative Companies by Fast Company.
Cloudflare values candidates who have the instinct to spot a 'normalized' problem and the AI-native curiosity to create a solution using the latest tools.
Cloudflare’s culture is built on iteration, leveraging AI to ship faster today to make it better tomorrow, while ensuring that every improvement is shared across the team.
Cloudflare is not just a highly ambitious, large-scale technology company; it's a highly ambitious, large-scale technology company with a soul.
Fundamental to Cloudflare's mission to help build a better Internet is protecting the free and open Internet.
Project Galileo: Since 2014, Cloudflare has equipped more than 2,400 journalism and civil society organizations in 111 countries with powerful tools to defend themselves against attacks.
Athenian Project: In 2017, Cloudflare created the Athenian Project to ensure that state and local governments have the highest level of protection and reliability for free, so that their constituents have access to election information and voter registration.
1.1.1.1: Cloudflare released 1.1.1.1 to help fix the foundation of the Internet by building a faster, more secure and privacy-centric public DNS resolver. Cloudflare does not store client IP addresses and will not sell user data to advertisers or use it to target consumers.

Equal Opportunity

Cloudflare is proud to be an equal opportunity employer.
We are committed to providing equal employment opportunity for all people and place great value in both diversity and inclusiveness.
All qualified applicants will be considered for employment without regard to their, or any other person's, perceived or actual race, color, religion, sex, gender, gender identity, gender expression, sexual orientation, national origin, ancestry, citizenship, age, physical or mental disability, medical condition, family care status, 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 a reasonable accommodation to apply for a job, please contact us via e-mail at hr@cloudflare.com or via mail at 101 Townsend St. San Francisco, CA 94107.