Madrid or Barcelona

NielsenIQ is hiring a Cybersecurity Engineer

About the Role

NielsenIQ is looking for a Cybersecurity Engineer to focus on reverse engineering and bypassing anti-bot mechanisms to enhance data extraction methods. In this role, you will develop custom tools and implement stealthy scraping techniques to keep operations discreet, requiring continuous innovation to stay ahead of evolving security defenses.

What You'll Do

  • Analyze web and mobile applications (APK/IPA) to uncover hidden mechanisms and disassemble code to understand its inner workings, with a focus on cryptographic functions.
  • Evaluate and bypass advanced security protocols such as TLS, HTTP/2, HTTP/3, WebSockets, and DoH, along with session management, to identify vulnerabilities.
  • Build robust Python scripts and frameworks that automate bypass procedures and dynamically adjust security measures.
  • Engineer sophisticated methods—such as browser patching, headless browser evasion, proxy tunneling, and human‑behavior emulation—to keep operations discreet.
  • Regularly test, disrupt, and improve tools to stay ahead of ever‑evolving defenses.

What We're Looking For

  • Expertise in reverse engineering using tools like IDA Pro, Ghidra, or custom-built solutions to dissect both binary and web code.
  • Deep expertise in protocols such as TLS, HTTP/2, WebSockets, DoH, and more to find innovative solutions.
  • Advanced Python development skills for designing and implementing robust, efficient solutions for complex challenges.

Technical Stack

  • Languages & Tools: Python, IDA Pro, Ghidra
  • Protocols & Technologies: TLS, HTTP/2, HTTP/3, WebSockets, DoH

Benefits & Compensation

  • Flexible working environment
  • Volunteer time off
  • LinkedIn Learning
  • Employee-Assistance-Program (EAP)

All employment decisions at NIQ are made without regard to race, color, religion, sex (including pregnancy, sexual orientation, or gender identity), national origin, age, disability, genetic information, marital status, veteran status, or any other characteristic protected by applicable laws.

Required Skills
PythonIDA ProGhidraReverse EngineeringTLSHTTP/2HTTP/3WebSocketsDoHBinary AnalysisWeb Code AnalysisProtocol Analysis PythonIDA ProGhidraReverse EngineeringTLSHTTP/2HTTP/3WebSocketsDoHBinary AnalysisWeb Code AnalysisProtocol Analysis
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About company
NielsenIQ
NielsenIQ delivers the Full View of shopper behaviour to clients through Homescan panel data, capturing real shopper behaviour to provide insights for businesses, particularly in the FMCG sector.
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Job Details
Department Information Technology
Category security
Posted 2 months ago