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 tunneling, and human‑behavior emulation to keep our operations discreet.
- Continuous Innovation: Regularly test, disrupt, and improve our tools to stay ahead of ever‑evolving defenses.

Your Profile

- Passionate Code Warrior: You thrive on pushing systems to their limits while upholding the highest ethical standards. Reverse Engineering isn’t just a work, it’s your creative playground.
- Reverse Engineering Expertise: Whether using tools like IDA Pro, Ghidra, or your own custom‑built solutions, you excel at dissecting both binary and web code to uncover core functionalities.
- Web & Network Protocols Savant:



You possess deep expertise in protocols such as TLS, HTTP/2, WebSockets, DoH, and more, leveraging that knowledge to find innovative solutions.
- Advanced Python Developer: Your coding abilities go far beyond basic scripting. We’re looking for a coder who can design and implement robust, efficient solutions for complex challenges.
- Collaborative Innovator: While you excel as an independent problem‑solver, you also thrive in a dynamic team environment that values open communication and continuous learning.

Our Benefits

- Adaptable working environment
- Volunteer time off
- LinkedIn Learning
- Employee‑Assistance‑Program (EAP)

Our Commitment to Diversity, Equity, and Inclusion

At NIQ, we are steadfast in our commitment to fostering an inclusive workplace that mirrors the rich diversity of the communities and markets we serve. We believe that embracing a wide range of perspectives drives innovation and excellence. 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. We invite individuals who share our dedication to inclusivity and equity to join us in making a meaningful impact.

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