Network Security Engineer
A Network Security Engineer at Cloudflare troubleshoots complex network/security incidents (Layers 3/4/7) for enterprise customers, advises on DDoS/WAF/Network Firewall tools, and collaborates with engineering to improve security products. Core tech: Cloudflare’s security stack (Magic Transit, Argo, WAF), TCP/IP, BGP, packet analysis, and scripting.
- Compensation
- Not disclosed
- Location
- Hybrid
- Work setup
- Hybrid
- Seniority
- Not specified
- Employment
- Not specified
- Experience
- 4+ years
- Category
- Security
- Posted
Skills
Must have
- 4+ years as Network Security Engineer/Technical Support Engineer/Sr. Support Engineer
- Troubleshooting & problem-solving skills for complex network/security issues
- Strong TCP/IP, DNS, HTTP/S, BGP, anycast routing knowledge
- Experience with iptables, packet capture analysis, GRE tunnels
- Fluency in command-line tools (curl, dig, traceroute, openssl, git)
- Web server configuration (Apache, Nginx, Caddy, IIS)
- Scripting in Bash, Python, or JavaScript
- Database experience (PostgreSQL, MySQL, MS SQL)
- Bachelor’s in Computer Science/Cybersecurity or equivalent
Nice to have
- Relevant certifications (CISSP, GCIA, GCIH, GCFA, GCFE)
Full description
About Us
At Cloudflare, we are on a mission to help build a better Internet. Today the company runs one of the world’s largest networks that powers millions of websites and other Internet properties for customers ranging from individual bloggers to SMBs to Fortune 500 companies. Cloudflare protects and accelerates any Internet application online without adding hardware, installing software, or changing a line of code. Internet properties powered by Cloudflare all have web traffic routed through its intelligent global network, which gets smarter with every request. As a result, they see significant improvement in performance and a decrease in spam and other attacks. Cloudflare was named to Entrepreneur Magazine’s Top Company Cultures list and ranked among the World’s Most Innovative Companies by Fast Company.
At Cloudflare, we’re not looking for people who wait for a polished roadmap; we’re looking for the builders who see the cracks in the Internet that everyone else has simply learned to live with. We value candidates who have the instinct to spot a "normalized" problem and the AI-native curiosity to create a solution using the latest tools. Our culture is built on iteration, leveraging AI to ship faster today to make it better tomorrow, while ensuring that every improvement, no matter how small, is shared across the team to lift everyone up. If you’re the type of person who values curiosity over bureaucracy, and that AI is a partner in solving tough problems to keep the Internet moving forward, you’ll fit right in.
Available Location: Singapore or Tokyo, Japan
This position is open to experienced candidates, as well as fresh graduates who will be graduating in December 2026 or Jan 2027.
About the Team
The Cloudflare Customer Support Team solves complicated problems and answers technical questions via phone, email, chat and social media. Whether it is a Wordpress blogger using our services for free or a global Enterprise business with petabytes of web traffic, we are always eager to assist. We are the eyes and ears of Cloudflare, acting as the real-time voice of the customer to help communicate their needs and real-world use cases back to the rest of the company - for better service and future product development.
What You'll Do
Do you love solving complex technical issues and interacting with people? Are you passionate about providing premium-level support to customers and are a standout colleague? Cloudflare is seeking an experienced Network Security Engineer to join our team and support our largest and most technically sophisticated customers in resolving technical problems, threats or attacks on their infrastructure at OSI Layers 3, 4, and 7. This will span the range of Cloudflare products from Magic Transit Infrastructure Protection, Argo Smart Routing, DDoS mitigation and Network Firewall, to using the Web Application firewall (WAF), Spectrum and Rate Limiting to help customers.