Cybersecurity Engineer - Ethical Hacking (CTF, Reverse Engineering, Antibot)

NielsenIQ · Madrid, Barcelona, Valladolid , , Spain · Remote-friendly

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Company
NielsenIQ
Location
Madrid, Barcelona, Valladolid , , Spain
Employment type
Full-time
Posted
June 16, 2026

About this job

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 our data extraction methods. Developing Custom Tools: Build robust Python scripts and frameworks that automate bypass procedures and dynamically adjust security measures whether by modifying TLS stacks or patching JavaScript on the fly. Implementing Stealthy Scraping Techniques: Engineer sophisticated methods such as browser patching, headless browser evasion, proxy t…

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Engineer salaries in Spain

Based on 73 postings that disclose pay.

Median salarygross / year
€57,500
€32,000Typical range€72,500

Estimated from advertised pay across our sources — indicative gross annual figures, not an offer.

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