Responsibilities

- Analyze web and mobile applications (APK/IPA) to uncover hidden mechanisms through reverse engineering & decompilation, focusing on cryptographic functions.
- Evaluate and bypass advanced security protocols such as TLS, HTTP/2, HTTP/3, WebSockets, DoH, and session management to identify vulnerabilities and enhance data extraction methods.
- Build robust Python scripts and frameworks that automate bypass procedures and dynamically adjust security measures, including modifying TLS stacks or patching JavaScript.
- Engineer sophisticated scraping techniques such as browser patching, headless browser evasion, proxy tunneling, and human‑behavior emulation to keep operations discreet.
- Continually test, disrupt, and improve tools to stay ahead of evolving defenses.

Qualifications

- Passionate code warrior with a drive to push systems to their limits while maintaining ethical standards.
- Expertise in reverse engineering using tools like IDA Pro, Ghidra,



or custom solutions to dissect binary and web code.
- Deep knowledge of web and network protocols, including TLS, HTTP/2, WebSockets, DoH, etc., to find innovative solutions.
- Advanced Python developer capable of designing and implementing robust, efficient solutions for complex challenges.
- Collaborative problem‑solver who thrives in team environments that value open communication and continuous learning.

Benefits

- Versátil working environment.
- Volunteer time off.
- Eurostaffs 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.

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📌 Cybersecurity Engineer - Ethical Hacking (CTF, Reverse Engineering, Antibot) at NielsenIQ (Madrid)
🏢 NielsenIQ
📍 Madrid