Network Security Engineer

Posted 2 Days Ago
Be an Early Applicant
Tokyo
Mid level
Cloud • Information Technology • Security • Software • Cybersecurity
Helping Build a Better Internet
The Role
Network Security Engineers at Cloudflare provide advanced support for security products, handle customer inquiries about threats and mitigation strategies, monitor alerts for attacks, and collaborate with internal teams. They implement security strategies and analyze traffic to distinguish between legitimate and malicious activity.
Summary Generated by Built In

About the Department
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.
Description
Network Security Engineers provide premium-level support for Cloudflare's security products and features. Our largest and most technically sophisticated customers will contact Support for assistance and intelligence in dealing with threats or attacks on their infrastructure at OSI Layers 3, 4, and 7. This will span the range of Cloudflare security products from Magic Transit Infrastructure Protection, DDoS mitigation and Network Firewall, to using the Web Application firewall (WAF), Spectrum and Rate Limiting to help customers.
Network Security Engineers analyse threats, make detailed and informed suggestions for mitigation and may need to implement mitigation strategies directly on behalf of the customer. They will also provide attack reporting beyond Cloudflare's self-service reports.
Responsibilities

  • Ability and willingness to work occasional weekends, holidays, and after hours
  • Minimum 5 years of experience
  • Monitor and react to alerts to identify attacks
  • 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 the products and tools
  • Communicate with customers via chat, email, and phone
  • Review the latest alerts to determine relevancy and urgency. Create new tracking tickets for alerts that signal an incident and require review or escalation.
  • Manage and configure security monitoring tools.
  • 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: filter malicious traffic using Cloudflare tools like Magic Transit, Network Firewall, WAF, IP reputation lists, packet inspection, blacklisting, whitelisting, and/or rate limiting.


Key skill sets

  • Modern internet protocols like UDP, TCP, etc.
  • Advanced understanding of iptables
  • Knowledge of Cloudflare Security Products & Features
  • Technical Support experience
  • Great communication skills with high-value VIP customers under attack
  • Computer Networking fundamentals
  • Command line / Bash shell
  • Sysadmin skills (Linux/Mac/Windows) & Programming skills (Python, Ruby, PHP, C, C#, Java, Perl, etc.)
  • Security skills and certifications: CISSP, GCIA GCIH, GCFA, GCFE, etc.
  • Data analysis
  • PCAP analysis
  • Calm under pressure

Top Skills

C
C#
Java
Perl
PHP
Python
Ruby
The Company
HQ: San Francisco, CA
3,900 Employees
Hybrid Workplace
Year Founded: 2010

What We Do

Cloudflare, Inc. (NYSE: NET) is the leading connectivity cloud company on a mission to help build a better Internet. It empowers organizations to make their employees, applications and networks faster and more secure everywhere, while reducing complexity and cost. Cloudflare’s connectivity cloud delivers the most full-featured, unified platform of cloud-native products and developer tools, so any organization can gain the control they need to work, develop, and accelerate their business.

Powered by one of the world’s largest and most interconnected networks, Cloudflare blocks billions of threats online for its customers every day. It is trusted by millions of organizations – from the largest brands to entrepreneurs and small businesses to nonprofits, humanitarian groups, and governments across the globe.

Why Work With Us

Cloudflare employees come from all walks of life. We are mission-driven, and our team is energized by a collaborative, creative environment that celebrates our differences and fosters new ways to grow together.

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