Incident Response Analyst

Cloudflare•San Francisco, CA

1d•Onsite

About The Position

Cloudflare is a system spanning the globe, on a mission to make the internet safer and more powerful everyday. To help fulfill this mission, we are seeking a talented Incident Response Analyst to join us in growing our Cloudforce One REACT organization. In this role, you will be instrumental in building a proactive and threat intelligence-driven approach to protecting Cloudflare and its customers from sophisticated and evolving threat actors. As a REACT Consultant, you will respond to customer security incidents across on-premises, cloud, and hybrid environments. This position requires an innovative, self-starting, and detail-oriented problem solver with a passion for analyzing, tracking, and triaging malicious activity. You will engage with customers at all levels—including Executive, VP, Director, and engineering levels—serving an integral role alongside forensic analysts, threat researchers, detection engineers, and malware analysts to detect, isolate, and mitigate threats.

Requirements

Bachelor's degree in Computer Science, Information Systems, Cybersecurity, a related technical field, or equivalent training/practical experience.
5+ years of overall experience in cybersecurity, including 2+ years of dedicated Incident Response
In-depth understanding of Windows operating systems and general knowledge of Unix, Linux, and Mac environments.
Familiarity with cloud environments (AWS, Azure, O365, Google Cloud, Cloudflare) and cloud IR methodologies.
Strong understanding of common L3/L4/L7 attack patterns, including SYN floods, UDP floods, DNS amplification, HTTP floods, credential stuffing, scraping, API abuse, account enumeration, and checkout abuse.
Experience with JA3/JA4 fingerprinting, bot detection, behavioral traffic analysis, or API abuse investigations.
Experience supporting customers during live DDoS, bot, or application-layer attack events.
Solid understanding of MITRE ATT&CK and NIST Cyber Security Frameworks.
English Fluency, Excellent verbal and written communication skills with a proven ability to establish relationships and clearly explain tasks, guidance, and complex technical findings to executive and technical clients.

Nice To Haves

Strong understanding of internet routing fundamentals, including BGP, Anycast, DNS, TCP/IP, GRE/IPsec tunneling, routing policies, prefix announcements, route propagation, RPKI, IRR, ASN ownership, and traffic engineering concepts.
Proficient in Python or Golang, capable of writing modular code or simple scripts that can be installed on a remote system.
Proficient with Yara and writing rules to detect similar malware samples.
Understanding of source code, hex, binary, regular expressions, data correlation, and analysis (such as network flow and system logs).
Practical malware analysis experience with static, dynamic, and automated techniques, including the ability to reverse engineer various file formats and analyze complex samples.
Reverse engineering experience with APT malware with an understanding of common infection vectors, infrastructure enumeration, malware attribution, and current evasion tactics.
Familiarity with bash command-line executables to conduct static analysis and investigate Indicators of Compromise (IOCs).

Responsibilities

Execute immediate defensive maneuvers at the Cloudflare edge to protect customer availability. This includes deploying custom WAF rules, implementing L3/L4 DDoS shunning, and performing real-time traffic filtering to neutralize attacks before they reach the customer's origin.
Support and execute the end-to-end incident response process for clients (investigation, containment, remediation, and recovery).
Review technical deliverables and coordinate sessions with customer stakeholders to ensure high-quality service and resolution.
Build a strong understanding of targeted attacks to create and execute customized tactical and strategic remediation plans for compromised organizations.