Network Security Engineer

Overview

We are seeking an experienced

Network Security Engineer

to join Cloudflare's team and support our largest and most technically sophisticated customers in resolving technical problems, threats or attacks on their infrastructure across OSI Layers 3, 4 and 7. This role focuses on Cloudflare products including Magic Transit Infrastructure Protection, Argo Smart Routing, DDoS mitigation, Network Firewall, Web Application Firewall (WAF), Spectrum and Rate Limiting. Responsibilities

Serve as a trusted technical advisor for our enterprise customers, responding to and resolving inquiries and incidents related to network security and performance, while delivering timely, high-quality and personalized assistance. Work directly with customers to diagnose, troubleshoot and resolve complex technical issues involving DDoS mitigation, firewall rules, SSL / TLS, network configuration, and other security configurations. Create and maintain knowledge base articles, technical guides, and troubleshooting documentation for internal and customer use. Compare traffic signatures and attributes including IP addresses, cookie variations, HTTP headers, and JavaScript footprints to determine what is good traffic and what is malicious. DDoS mitigation for OSI layers 3,4, & 7 : advise customers on how to filter malicious traffic using Cloudflare tools like Magic Transit, Network Firewall, WAF, IP reputation lists, packet inspection, blocklisting, allowlisting, and rate limiting. Work with Engineering and Product teams to improve products and tools. Qualifications

You have a minimum of 4 years experience working as a Network Security Engineer / Technical Support Engineer / Sr. Support Engineer supporting networking or web security products. Exceptional troubleshooting and problem-solving skills, with the ability to simplify complex concepts for customers. Strong customer service orientation and communication skills, both written and verbal, fluent in English and preferably a second language like Mandarin, Hindi, Tamil, Korean or Japanese. Ability to work independently and collaboratively in a fast-paced, dynamic environment. Strong understanding of network protocols, including TCP / IP, DNS, HTTP / S, and BGP, with a particular focus on anycast routing concepts and implementation, as well as tools such as iptables and looking glass. Proven experience troubleshooting network connectivity issues, BGP routing, and GRE tunnels, and performing packet capture analysis. Confident with command line and tools, including curl, dig, traceroute, openssl, git. Experience in a web development and / or hosting environment such as installing and configuring web servers like Apache, Nginx, Caddy and IIS. You are competent writing scripts in Bash, Python, JavaScript or other scripting language. You have worked with PostgreSQL, MySQL, MS SQL, and other database servers. Bachelor’s degree in Computer Science, Cybersecurity, or a related field (or equivalent experience). Relevant certifications such as CISSP, GCIA GCIH, GCFA, GCFE or equivalent. 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! 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. Cloudflare provides reasonable accommodations to qualified individuals with disabilities. Please tell us if you require a reasonable accommodation to apply for a job. Examples of reasonable accommodations include, but are not limited to, changing the application process, providing documents in an alternate format, using a sign language interpreter, or using specialized equipment. 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.

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