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Cyber Security Engineer (CTF, Reverse Engineering, Anti-bot & Ethical Hacker experience) at NielsenIQ
NielsenIQLisbon/Porto, pt·2h ago
SeniorFull-timeJavaScriptPythonJava
Salary Range
$59,670 - $80,730 /year
This salary is estimated based on similar roles. The actual salary may vary.
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. 
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About NielsenIQ
NielsenIQ is a global leader in providing data and insights to help businesses understand consumer behavior and market trends. Operating at the intersection of retail, media, and consumer goods industries, the company was formed through the strategic merger of Nielsen and CACI International's information services division, leveraging decades of expertise in market analytics. Headquartered in the United States with a widespread international presence, NielsenIQ combines advanced technology with deep industry knowledge to deliver actionable intelligence to clients worldwide. The company offers a comprehensive suite of products and services, including retail measurement, media analytics, and consumer insights, all powered by cutting-edge data science and AI technologies. Key features of their solutions include real-time market tracking, granular consumer segmentation, and predictive analytics to optimize business strategies. NielsenIQ primarily serves large retailers, consumer packaged goods manufacturers, and media companies, providing them with the tools to enhance decision-making, drive growth, and adapt to evolving market dynamics. Notable achievements include being a long-standing benchmark in retail measurement and media ratings, with a reputation for accuracy and reliability. NielsenIQ holds a dominant market position, trusted by over 50,000 clients globally, and is recognized for its commitment to innovation and data integrity. The company’s unique value proposition lies in its ability to unify disparate data sources into cohesive insights, enabling clients to navigate complexity and capitalize on emerging opportunities with confidence.
