Note: The job is a remote job and is open to candidates in USA. Cloudflare is a technology company focused on helping build a better Internet through its global network and Internet security services. The company is seeking an experienced Network Security Engineer to support enterprise customers by resolving complex network security, performance, threat, and attack-related issues across OSI Layers 3, 4, and 7. The role also involves creating technical documentation, analyzing traffic, advising on DDoS mitigation, collaborating with Engineering and Product teams, and using AI and automation to improve incident response.
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 confirmation, 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
- Utilize generative AI and automation tools to streamline log analysis, accelerate root-cause analysis during security incidents, and optimize customer response times
Skills
- 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
- 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 at writing scripts in Bash, Python, JavaScript or other scripting languages
- 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
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