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Cyber Security Engineer (CTF, Reverse Engineering, Anti-bot & Ethical Hacker experience)

NielsenIQ | barcelona, Spain | Posted June 02, 2026

Position Overview

Cyber Security Engineer (CTF, Reverse Engineering, Anti-bot & Ethical Hacker experience)

  • Full-time

At Digital Shelf by NIQ, we’re passionate about technological innovation and excellence in cybersecurity. Our cutting-edge solutions enable us to scrape data for 12 billion products and manage over 20 billion data points. In a market where anti‑bot technologies represent a $10B industry in constant evolution and consolidation, our dedicated teams tackle real‑world challenges with precision and creativity.

What You’ll Do

Reverse Engineering & Decompilation:
Analyze web and mobile applications (APK/IPA) to uncover hidden mechanisms. Disassemble code to understand its inner workings, with a focus on cryptographic functions that secure our systems.

Overcoming Anti‑Bot Mechanisms:
Evaluate and bypass advanced security protocols such as TLS, HTTP/2, HTTP/3, WebSockets, DoH, and session management. Identify vulnerabilities to enhance...

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