Network Security Engineer
Core
Provide premium-level technical support and resolve complex security threats (DDoS, attacks) for large customers across OSI Layers 3, 4, and 7 using Cloudflare's network security products.
Role type
Senior IC Network Security Engineer (Customer Support)
Builds
Customer trust and system stability via DDoS mitigation, traffic filtering, and attack resolution
Domain
Cybersecurity / Network Infrastructure / Cloud Services
Deliverable
client delivery
Required skills
OSI model fundamentals, TCP/UDP protocols, network troubleshooting (BGP, GRE), packet capture analysis, command line tools (iptables, curl, dig, traceroute, openssl), web server configuration (Apache, Nginx, IIS), scripting (Bash, Python, JavaScript), DNS/SSL/TLS/HTTP troubleshooting
Preferred skills
Database administration (PostgreSQL, MySQL, MS SQL), existing Cloudflare platform usage
Technologies
Magic Transit, Network Firewall, WAF, Spectrum, Rate Limiting, Argo Smart Routing, iptables, curl, dig, traceroute, openssl, git, Apache, Nginx, Caddy, IIS
Responsibilities
Communicate with customers via chat, email, and phone to resolve technical issues; Analyze traffic signatures (IPs, cookies, headers, JS footprints) to distinguish good vs. malicious traffic; Implement DDoS mitigation strategies using Cloudflare tools; Collaborate with Engineering and Operations teams to apply mitigations and improve products
Seniority
Senior, hands-on IC
