Incident Response Engineer - PhishGuard
Cloudflare · Bengaluru · 5+ yrs experience · Posted 2026-07-18
Tech stack: C, SQL
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About the role
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.
Responsibilities:
- As a Response Engineer for PhishGuard, you will serve as the essential human intelligence layer responsible for identifying, tracking, and defeating sophisticated email-borne cyber threats like Business Email Compromise (BEC) and vendor fraud.
- You will operate within the INTERDICT organization, collaborating closely with internal teams like Detection Engineering, PREDICT (Threat Intelligence), and SIRT to hunt down adversaries and refine global security models.
- Our ideal candidate possesses deep forensic thoroughness, exceptional nuance detection, and a growth-minded curiosity to protect global organizations using one of the world's largest networks.
- Conduct continuous, real-time monitoring of email threat queues to review and analyze sophisticated attacks flagged by Cloudflare Email Security automated systems.
- Investigate customer-reported submissions, execute proactive threat hunts targeting emerging patterns, and perform manual retraction or quarantine of verified malicious emails.
- Provide critical feedback to Detection Engineering to update machine learning models and contribute novel campaign data to global intelligence repositories.
- Identify nuanced threat patterns by correlating technical telemetry with behavioral indicators, generating detailed threat dossiers for impending organizational risks.
- Deliver direct crisis intervention and proactive phone notifications to customers regarding high-dollar BEC threats and active insider risks.
- Lead technical onboarding sessions for new customers, configuring internal system instances with bespoke detection rules, thresholds, and custom allow/block lists.
- Guide customers through their multi-year DMARC implementation journey toward strict "Reject" policy enforcement by conducting SPF and DKIM alignment audits.
Qualifications:
- (Must-Have Skills)
- Undergraduate degree in Computer Science, Information Security, Information Systems, or equivalent practical experience.
- 5+ years of experience tracking and analyzing complex cyber campaigns utilizing technical indicators such as Domains, IP Addresses, and email headers.
- Proven expertise analyzing, investigating, and defending against highly targeted phishing, invoice fraud, and Business Email Compromise (BEC) attacks.
- Deep working knowledge of core email authentication protocols (SPF, DKIM, DMARC) and aggregate/forensic data interpretation.
- Hands-on experience utilizing AI LLM tools (such as OpenCode or Windsurf) to develop automations for daily analysis and productivity workflows.
- Excellent verbal and written English communication skills, with a strong ability to translate complex technical threats into actionable business intelligence for executive stakeholders.
- Nice-to-Have Skills
- Relevant industry certifications such as GCIH, GCIA, CEH, Security+, or equivalent.
- Technical familiarity with regular expressions, YARA rules, SQL query formulation, and malicious file format analysis (e.g., Microsoft Office Documents, Adobe PDFs).
- Prior experience working within managed security services (MSSP) or customer-facing security consulting environments.
- Familiarity with the broader Cloudflare ecosystem, including Cloudflare Email Security, WAF, and Zero Trust architectures.
- We’re not just a highly ambitious, large-scale technology company.
- We’re 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, we've equipped more than 2,400 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 Cloudflare’s 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, we've 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.
- Here’s the deal - we don’t 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 you’d like to be a part of?
- We’d 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.
- 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 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 hr@cloudflare.com or via mail at 101 Townsend St.
- San Francisco, CA 94107.
Qualifications
- (Must-Have Skills)
- Undergraduate degree in Computer Science, Information Security, Information Systems, or equivalent practical experience.
- 5+ years of experience tracking and analyzing complex cyber campaigns utilizing technical indicators such as Domains, IP Addresses, and email headers.
- Proven expertise analyzing, investigating, and defending against highly targeted phishing, invoice fraud, and Business Email Compromise (BEC) attacks.
- Deep working knowledge of core email authentication protocols (SPF, DKIM, DMARC) and aggregate/forensic data interpretation.
- Hands-on experience utilizing AI LLM tools (such as OpenCode or Windsurf) to develop automations for daily analysis and productivity workflows.
- Excellent verbal and written English communication skills, with a strong ability to translate complex technical threats into actionable business intelligence for executive stakeholders.
- Relevant industry certifications such as GCIH, GCIA, CEH, Security+, or equivalent.
- Technical familiarity with regular expressions, YARA rules, SQL query formulation, and malicious file format analysis (e.g., Microsoft Office Documents, Adobe PDFs).
- Prior experience working within managed security services (MSSP) or customer-facing security consulting environments.
- Familiarity with the broader Cloudflare ecosystem, including Cloudflare Email Security, WAF, and Zero Trust architectures.
- We’re not just a highly ambitious, large-scale technology company.
- We’re 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, we've equipped more than 2,400 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 Cloudflare’s 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, we've 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.
- Here’s the deal - we don’t 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 you’d like to be a part of?
- We’d 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.
- 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 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 hr@cloudflare.com or via mail at 101 Townsend St.
- San Francisco, CA 94107.
Responsibilities
- As a Response Engineer for PhishGuard, you will serve as the essential human intelligence layer responsible for identifying, tracking, and defeating sophisticated email-borne cyber threats like Business Email Compromise (BEC) and vendor fraud.
- You will operate within the INTERDICT organization, collaborating closely with internal teams like Detection Engineering, PREDICT (Threat Intelligence), and SIRT to hunt down adversaries and refine global security models.
- Our ideal candidate possesses deep forensic thoroughness, exceptional nuance detection, and a growth-minded curiosity to protect global organizations using one of the world's largest networks.
- Conduct continuous, real-time monitoring of email threat queues to review and analyze sophisticated attacks flagged by Cloudflare Email Security automated systems.
- Investigate customer-reported submissions, execute proactive threat hunts targeting emerging patterns, and perform manual retraction or quarantine of verified malicious emails.
- Provide critical feedback to Detection Engineering to update machine learning models and contribute novel campaign data to global intelligence repositories.
- Identify nuanced threat patterns by correlating technical telemetry with behavioral indicators, generating detailed threat dossiers for impending organizational risks.
- Deliver direct crisis intervention and proactive phone notifications to customers regarding high-dollar BEC threats and active insider risks.
- Lead technical onboarding sessions for new customers, configuring internal system instances with bespoke detection rules, thresholds, and custom allow/block lists.
- Guide customers through their multi-year DMARC implementation journey toward strict "Reject" policy enforcement by conducting SPF and DKIM alignment audits.