Software Engineer, Application Performance

Overview About Cloudflare: We are on a mission to help build a better Internet. Cloudflare runs one of the world’s largest networks that powers millions of websites and other Internet properties. We protect and accelerate Internet applications without requiring hardware, software installation, or code changes. Our network routes web traffic through an intelligent global system to improve performance and reduce spam and attacks. Cloudflare has been recognized by Entrepreneur Magazine and Fast Company for its culture and innovation. We seek curious and empathetic people who are committed to developing themselves and learning new skills, and we are ready to help you do that. We value diversity and inclusion and hire based on potential and support team members throughout their time at Cloudflare. Come join us Software Engineer, All Levels (Hybrid) Hiring Process & Cloudflare\'s Application Performance Engineering Teams If you are obsessed with making the Internet faster, safer, and more reliable for everyone, but are unsure about which team to apply for, this role offers a strong opportunity to match with a Software Engineering team that aligns with your experience, skill, and ambition. The hiring process is designed to find top candidates passionate about improving web and software application performance and to help them find the best team fit at Cloudflare. At the end of the process you will meet with one or more teams to determine the best match, and you can indicate your preferred team. About Engineering at Cloudflare Cloudflare’s Engineers build and operate software that powers 25+ million Internet properties and millions of businesses worldwide. We seek high-caliber, curious, and empathetic technology enthusiasts to tackle big challenges and build strong skills. Roles involve building and quickly iterating on high-growth products, scaling our network, improving availability, performance, uptime, and response times, and making systems fault-tolerant and elastic. Our network is a massively distributed system spanning 300+ cities in 125+ countries and interconnects with ~13,000 networks globally. You will work on code that runs close to the end user at Internet scale. Examples of software systems at Cloudflare: A TLS/HTTP proxy to connect eyeballs to edge securely and quickly Content optimization to improve performance of customer content A reverse-proxy system that caches customer website content per configuration Optimization of connections from Cloudflare to customers\' origin servers to reduce load and boost performance Data science analyzing HTTP request data to identify and mitigate malicious or fraudulent traffic One of the world\'s largest data pipelines, processing well over 250M events per second Open source projects including Pingora, Trie-hard, and more to come Requirements for this role First and foremost curiosity and critical thinking Experience with debugging complex distributed systems Experience with a continuous integration workflow and using source control (git) Experience with building and maintaining distributed systems Understanding of what it takes to build secure systems Ability to work in multiple systems-level programming languages – bonus points for Go and/or Rust Experience with monitoring, alerting, and debugging high-volume production systems Examples of desirable skills, knowledge and experience Minimum 4 years professional experience as a developer/engineer Solid grasp of how TCP/QUIC and HTTP work Experience with Linux networking Understanding systems at the network protocol level, including the differences between the specs and real-world Internet behavior Strong systems-level programming skills Experience with databases similar to PostgreSQL and Clickhouse Good Unix knowledge; patches to operating systems are a plus for some roles Fluent in analyses of large data sets BA/BS or higher in Computer Science/Engineering or equivalent professional experience What makes Cloudflare special? We are a highly ambitious, large-scale technology company with a soul. Protecting the free and open Internet is central to our mission. Project Galileo: Since 2014, we have equipped more than 2,400 journalism and civil society organizations in 111 countries with tools to defend against attacks that would censor their work, at no cost. Athenian Project: In 2017, we created the Athenian Project to ensure that state and local governments have protection and reliability for free, serving more than 425 local government election websites in 33 states. 1.1.1.1: We released 1.1.1.1 to provide a faster, more secure, privacy-centric public DNS resolver. We do not store client IP addresses. We will continue to honor our privacy commitments and do not sell or use data to target consumers. Sound like something you’d like to be part of? We’d love to hear from you This position may require access to information protected under U.S. export control laws, including the U.S. Export Administration Regulations. Any offer of employment may be conditioned on authorization to receive software or technology controlled under these 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 and value diversity and inclusiveness. All qualified applicants will be considered for employment without regard to race, color, religion, sex, gender, gender identity, gender expression, sexual orientation, national origin, ancestry, citizenship, 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 a reasonable accommodation to apply for a job, please contact us via e-mail at or via mail at 101 Townsend St. San Francisco, CA 94107. #J-18808-Ljbffr