Incident Response Analyst REACT

Available Locations: Lisbon Portugal

About the Role

Cloudflare is a system spanning the globe on a mission to make the Internet safer and more powerful every day. To help fulfill this mission we are seeking an incident response Analyst / Consultant to join our Cloudforce One REACT organization.

In this role you will respond to active customer attacks across two primary tracks:
1) L7 mitigations bot abuse web scraping credential stuffing and WAF/API abuse.
2) L3/L4 mitigations volumetric and protocol DDoS attacks.

You will execute hands-on edge mitigations verify effectiveness with measurable KPIs and communicate clearly with customers under pressure. This position requires an innovative self-starting detail-oriented problem solver with a passion for scoping deploying and validating mitigations in real time. You will engage with customers at all levels including Executive VP Director and engineering serving an integral role alongside forensic analysts threat researchers detection engineers and malware analysts.

What Youll Do

1. Active Edge Mitigation
Deploy and tune custom WAF rules (block challenge JS challenge managed challenge) to stop abusive L7 traffic.
Implement bot mitigations using request/behavior signals and where applicable fingerprinting signals; apply rate limiting and challenge policies.
Execute L3/L4 DDoS mitigations (e.g. attack mode tuning shunning flow-based controls) to protect customer availability before traffic reaches the origin.
Scope every mitigation tightly by path endpoint tenant or audience to minimize collateral impact.

2. Customer Containment & Threat Isolation
Identify and isolate infected hosts revoke compromised sessions/identities and stop data exfiltration when needed.
Track unauthorized lateral movement correlate threat actor activity and execute containment that preserves evidence while neutralizing the adversary.
Adapt mitigations as attacker tactics change without over-scoping or breaking legitimate traffic.

3. Verification KPIs & Rollback
Define mitigated using success criteria: service health recovery reduced abusive match rate and acceptable collateral limits.
Verify effectiveness after each mitigation update using time-bucketed telemetry; rollback or re-scope immediately if collateral damage appears.
Maintain a versioning mindset for mitigations so updates are reversible and auditable.

4. IR Lifecycle Evidence & Reporting
Support the full incident response lifecycle: investigation containment remediation and recovery.
Preserve forensic evidence (logs volatile memory disk images) according to standards to support legal regulatory or insurance requirements.
Prepare high-fidelity incident reports and customer communications that are clear accurate and actionable for both executives and engineers.

Minimum Qualifications (Must-Haves)
3 years of hands-on experience in SOC incident response or detection engineering.
Proven experience deploying mitigations that affect live customer traffic not only monitoring or investigation.
Hands-on with at least one of the following: WAF rules/actions DDoS protection controls bot mitigations rate limiting/challenge policies.
Strong incident process discipline: triage scope mitigate verify communicate.
In-depth understanding of Windows operating systems and general knowledge of Unix/Linux/Mac environments.
Familiarity with cloud environments (AWS Azure O365 Google Cloud) and cloud IR methodologies.
Strong technical knowledge of common network protocols and design patterns (TCP/IP HTTPS SSH RDP SMB DNS).
Solid understanding of MITRE ATT&CK and the NIST Cybersecurity Framework.
Excellent verbal and written English communication skills with a proven ability to establish relationships and clearly explain complex technical findings to executive and technical clients.

Desirable Skills Knowledge and Experience
Experience with Cloudflare products (WAF DDoS protection Bot Management API Shield) or equivalent edge platforms.
Familiarity with bot fingerprinting concepts (e.g. JA3/JA4) and behavioral analysis.
Proficient in Python or Golang; capable of writing modular code or simple scripts that can be used remotely.
Familiarity with YARA and writing rules to detect similar malware samples.
Practical malware analysis experience with static dynamic and automated techniques.
Understanding of source code hex binary regular expressions data correlation and analysis (network flow and system logs).
Familiarity with bash command-line executables to conduct static analysis and investigate Indicators of Compromise (IOCs).
Experience with network protocols and devices. (BGP OSPF Routers Firewalls Switches)

Compensation

For Portugal based hires: Estimated annual salary is between 54000 - 75000.

• The final offer will be inclusive of time exemption in alignment with the applicable law and collective bargaining agreements.

Equity

This role is eligible to participate in Cloudflares equity plan.

What Makes Cloudflare Special

Were not just a highly ambitious large-scale technology company. Were a highly ambitious large-scale technology company with a soul. Fundamental to our mission to help build a better Internet is protecting the free and open Internet.

Project Galileo: Since 2014 weve equipped more than 2400 journalism and civil society organizations in 111 countries with powerful tools to defend themselves against attacks that would otherwise censor their work technology already used by Cloudflares enterprise customers--at no cost.

Athenian Project: In 2017 we created the Athenian Project to ensure that state and local governments have the highest level of protection and reliability for free so that their constituents have access to election information and voter registration. Since the project weve provided services to more than 425 local government election websites in 33 states.

1.1.1.1: We released 1.1.1.1 to help fix the foundation of the Internet by building a faster more secure and privacy-centric public DNS resolver. This is available publicly for everyone to use - it is the first consumer-focused service Cloudflare has ever released. Heres the deal - we dont store client IP addresses never ever. We will continue to abide by our privacy commitment and ensure that no user data is sold to advertisers or used to target consumers.

Sound like something youd like to be a part of Wed love to hear from you!

Please note that applicants who progress to the offer stage of the interview process may be asked to attend an in-person interview within one of the Cloudflare Offices or Cloudflare Hubs. More details about this will be available at that stage of the interview process.

This position may require access to information protected under U.S. export control laws including the U.S. Export Administration Regulations. Please note that any offer of employment may be conditioned on your authorization to receive software or technology controlled under these U.S. export laws without sponsorship for an export license.

Cloudflare is proud to be an equal opportunity employer. We are committed to providing equal employment opportunity for all people and place great value in both diversity and inclusiveness. All qualified applicants will be considered for employment without regard to their or any other persons perceived or actual race color religion sex gender gender identity gender expression sexual orientation national origin ancestry citizenship age physical or mental disability medical condition family care status or any other basis protected by law. We are an AA/Veterans/Disabled Employer.

Cloudflare provides reasonable accommodations to qualified individuals with disabilities. Please tell us if you require a reasonable accommodation to apply for a job. Examples of reasonable accommodations include but are not limited to changing the application process providing documents in an alternate format using a sign language interpreter or using specialized equipment. If you require a reasonable accommodation to apply for a job please contact us via e-mail at or via mail at 101 Townsend St. San Francisco CA 94107.