Researcher Web Security, Detection

Cloudflare
New York
Workplace: HybridFull timeUSD 150,000 - 185,000 annuallyFunction: Research & Scientific (R&D)Skills: ["Communication","Curiosity","Adversarial mindset"]

Research and strengthen web security detections by reverse-engineering bot and fraud tooling, probing Cloudflare’s defenses like an attacker, and turning adversary findings into scalable detection signals. You’ll develop heuristics, signatures, and mitigations that neutralize threats without “burning” detection signals, automate analyst workflows through code, and collaborate with data scientists and engineers across the threat-detection ecosystem.

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FursaFursa
Cloudflare
Cloudflare
2 days ago

Researcher Web Security, Detection

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Source: Company careers pageValidated by: Fursa AI
Last checked: 6 hours agoStatus: Live

Job Summary

Research and strengthen web security detections by reverse-engineering bot and fraud tooling, probing Cloudflare’s defenses like an attacker, and turning adversary findings into scalable detection signals. You’ll develop heuristics, signatures, and mitigations that neutralize threats without “burning” detection signals, automate analyst workflows through code, and collaborate with data scientists and engineers across the threat-detection ecosystem.
Location: New York
Workplace: Hybrid
Employment Type: Full time
Job Function: Research & Scientific (R&D)

Key Responsibilities

  • •Deeply study adversaries by reverse-engineering bot tools, automation frameworks, and fraud kits.
  • •Probe and stress-test Cloudflare detections to close gaps as adversaries evolve.
  • •Track the bot and fraud ecosystem and convert intelligence into actionable detection signals.
  • •Develop heuristics and detection ideas with data scientists and engineers.
  • •Automate investigation and rule-writing to scale detection work beyond manual processes.

Pay and Benefits

Salary: USD 150,000 - 185,000 annually
Equity and Bonus:Equity
Perks:Health InsuranceDentalVision401kPaid LeaveParental Leave

Key Requirements

  • •Understand bots, automation, and web-application attack tooling at scale.
  • •Deep web expertise in HTTP, TLS, browser internals, fingerprinting, and CAPTCHA evasion techniques.
  • •Perform ethical hacking and reverse engineering with an adversarial mindset to validate weaknesses.
  • •Script comfortably (e.g., Python or JavaScript) to build proofs of concept and tooling.
  • •Translate attacker research into concrete defender signals and clearly communicate complex findings to technical and non-technical audiences.
Skills:CommunicationCuriosityAdversarial mindset
Languages:English
Tech Stack:PythonJavaScriptHTTPTLSCAPTCHAsMachine learning

Company Brief

Cloudflare
Provides a global network and cloud platform that delivers security, performance, and reliability services for web applications, APIs, and Internet properties, including CDN, DDoS protection, DNS, and zero-trust security solutions.
Industry: Cybersecurity
Company Size: Enterprise (1,001+ employees)
Revenue: USD 1B+
Growth: Public Company
Valuation: Public Company (Market Cap in USD)
Funding: IPO / Publicly Listed
Headquarters: San Francisco, United States
Founded: 2009
WebsiteLinkedIn