# Network Security Engineer

**Company:** [Cloudflare](https://hotfix.jobs/companies/cloudflare)
**Location:** Unspecified
**Role:** Support Engineering
**Experience:** 4+ years
**Skills:** network security, ddos mitigation, waf, BGP, TCP/IP, Python, Bash, JavaScript, nginx, apache, Postgres, MySQL, packet analysis, firewall rules
**Posted:** 2026-07-24

> Support enterprise customers by troubleshooting and resolving complex network security issues including DDoS mitigation, firewall configurations, and performance problems across Cloudflare's security products. Requires 4+ years experience in network/web security support, strong protocol knowledge (BGP, TCP/IP), scripting skills, and customer-facing troubleshooting expertise.

## Job Description

## What You'll Do
- Serve as a trusted technical advisor for enterprise customers, responding to and resolving inquiries and incidents related to network security and performance.
- 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 good vs. malicious traffic.
- Provide DDoS mitigation for OSI layers 3, 4, and 7: advise customers on filtering 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.

## What We're Looking For
- 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.
- Competent at writing scripts in Bash, Python, JavaScript or other scripting languages.
- Experience working 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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