Senior Software Engineer, Zero Trust Client at Cloudflare

About Us At Cloudflare, we are on a mission to help build a better Internet. Today the company 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 all have web traffic routed through its intelligent global network, which gets smarter with every request. As a result, they see significant improvement in performance and a decrease in spam and other attacks. Cloudflare was named to Entrepreneur Magazine’s Top Company Cultures list and ranked among the World’s Most Innovative Companies by Fast Company. At Cloudflare, we’re not looking for people who wait for a polished roadmap; we’re looking for the builders who see the cracks in the Internet that everyone else has simply learned to live with. We value candidates who have the instinct to spot a "normalized" problem and the AI-native curiosity to create a solution using the latest tools. Our culture is built on iteration, leveraging AI to ship faster today to make it better tomorrow, while ensuring that every improvement, no matter how small, is shared across the team to lift everyone up. If you’re the type of person who values curiosity over bureaucracy, and that AI is a partner in solving tough problems to keep the Internet moving forward, you’ll fit right in. Location- Austin, TX What you'll do We’re looking for a 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 alongside 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 operating system concepts (virtual memory, multi-threading, process lifecycle, etc.) and networking concepts & protocols (VPNs, firewalls, TCP/IP, UDP, DNS, QUIC, H/3, proxying, etc.). You will also have to interact with other languages, such as Dart, Typescript, and Python. As a Senior Software Engineer, you will be expected to lead the design and implementation of major development projects, working closely with our product managers and other teams to deliver customer-impacting features. You will mentor other engineers, raise the bar on testability and documentation, and represent the team in cross-org technical discussions. You will use AI-powered tools and systems as part of your daily workflow to analyze and extend our codebase, introspect production behavior, and accelerate problem-solving. 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 • Demonstrated history of shipping and supporting client software on real end-user devices — including installer and auto-update flows, crash and telemetry reporting, and debugging issues against the long tail of real-world OS and hardware configurations • 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 • Willingness to adopt and integrate AI tools and systems into your engineering workflow • Empathetic, proactive, and constructive communication skills, verbal and written What Makes Cloudflare Special? We’re not just a highly ambitious, large-scale technology company. We’re a highly ambitious, large-scale technology company with a soul. Fundamental to our mission to help build a better Internet is protecting the free and open Internet. Project Galileo: Since 2014, we've equipped more than 2,400 journalism and civil society organizations in 111 countries with powerful tools to defend themselves against attacks that would otherwise censor their work, technology already used by Cloudflare’s enterprise customers--at no cost. Athenian Project: In 2017, we 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. Since the project, we've provided services to more than 425 local government election websites in 33 states. 1.1.1.1: We 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. This is available publicly for everyone to use - it is the first consumer-focused service Cloudflare has ever released. Here’s the deal - we don’t store client IP addresses never, ever. We will continue to abide by our privacy commitment and ensure that no user data is sold to advertisers or used to target consumers. Sound like something you’d like to be a part of? We’d love to hear from you! Please note that applicants who progress to the offer stage of the interview process may be asked to attend an in-person interview within one of the Cloudflare Offices or Cloudflare Hubs. More details about this will be available at that stage of the interview process. This position may require access to information protected under U.S. export control laws, including the U.S. Export Administration Regulations. Please note that any offer of employment may be conditioned on your authorization to receive software or technology controlled under these U.S. export laws without sponsorship for an export license. 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. 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