Network Security Engineer

Cloudflare

Network Security Engineer resolving complex network security issues for Cloudflare’s sophisticated customers. Engaging with customers to enhance the security infrastructure across various Cloudflare products.

Posted 6/30/2026full-timeAustin • Texas • 🇺🇸 United StatesMid-LevelSeniorWebsite

Tech Stack

Tools & technologies

ApacheDNSJavaScriptNGINXPython

About the role

Key responsibilities & impact

Communicate with customers via chat, email, and phone
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 Operations teams to mitigate attacks, suggest steps to mitigate, and apply the appropriate mitigation when applicable
Work with Engineering and Product teams to improve products and tools

Requirements

What you’ll need

Fluent English speaker is a requirement
Minimum 3 years working within a Technical Support team solving various technical issues
Self-driven and capable of learning new technologies / systems / features with little guidance
Fundamental understanding how the Internet works (OSI Model)
Advanced understanding of internet protocols like TCP and UDP
Computer Networking fundamentals, experience with iptables and looking glass
Experience troubleshooting network connectivity issues, BGP routing, and GRE tunnels
Packet capture analysis
Experience in command line and tools, including curl, dig, traceroute, openssl, git
Experience troubleshooting DNS, SSL / TLS, HTTP
Experience in a web development and / or hosting environment such as installing and configuring web servers like Apache, Nginx, Caddy and IIS
Experience writing scripts in Bash, Python, JavaScript or other scripting language
Experience in working as part of a team in a customer-facing role.

Benefits

Comp & perks

Flexibility to work varying work schedules including: 8:30 AM - 5:30 PM Pacific Time Zone, Tuesday through Saturday, Sunday through Thursday, holidays, weekends, more than 5 days in a row, or additional hours on occasion.

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

Understanding of OSI ModelInternet Protocols (TCP, UDP)Computer Networking FundamentalsExperience with iptablesBGP RoutingGRE TunnelsTroubleshooting DNSSSL / TLSHTTPWeb Server Configuration (Apache, Nginx, Caddy, IIS)

Soft Skills

Customer CommunicationSelf-Driven LearningTeam Collaboration