Summary: Join Cognizant as a Senior Reverse Engineer to analyze complex Android applications, defeat advanced obfuscation, and contribute to mobile security, tackling challenging technical tasks. Highlights: 1. Tackle the most complex reverse engineering tasks on Android applications. 2. Act as the final technical authority for highly protected Android apps. 3. Develop custom tools and automation frameworks for novel protection analysis. 00066450792 * Date published **Jan 26 2026** * Location **Barcelona** **/** **Spain** * Job category **Technology \& Engineering** * Work model **Hybrid** What makes Cognizant a truly unique place to work? Cognizant offers strong growth, global reach and an innovative environment where tech professionals can deliver meaningful, high‑impact work. Teams collaborate across regions to build and deliver advanced solutions for leading companies, enabling greater agility, innovation and performance. We are looking for a capable **Senior Reverse Engineer** to join our dynamic project. You will tackle the most complex reverse engineering tasks, specifically those involving applications protected by advanced, custom anti\-tampering and obfuscation techniques. The primary responsibility is the in\-depth analysis and interpretation of Android application code using industry\-standard reverse engineering tools and methodologies to understand app functionality, identify potential malicious use of the SDK, and support overall project objectives. This presents an exciting opportunity for professionals passionate about mobile security, reverse engineering, and overcoming difficult technical challenges. Can you see yourself in this position? Check the requirements and apply! **Key Responsibilities:** * Act as the final technical authority for the most complex, evasive, and highly protected Android applications, with no expected escalation of tasks. * Execute deep analysis into complex ARM Assembly, system\-level calls, and low\-level binary analysis. * Define and enforce the highest technical standards for the team's reverse engineering methodologies and documentation quality. * Able to defeat all forms of advanced obfuscation (custom packers, virtualization, advanced anti\-debugging). * Develop custom tools, Ghidra/IDA Pro plugins, or complex automation frameworks to enable analysis of novel protection mechanisms. * Contribute to high\-level security risk assessment and technical reporting based on expert\-level findings. **You are someone who brings:** * Expertise in Reverse engineering Android applications (APKs) OR Android Development using Android SDK OR Penetration Testing / Offensive security * Expertise in ARM assembly language and deep knowledge of the Android security model and kernel interaction. * Demonstrable experience defeating commercial and custom anti\-analysis and anti\-tampering techniques. * Experience with static and dynamic analysis techniques. * Strong analytical and problem\-solving skills. * Excellent communication and documentation skills. * Familiarity with malware analysis techniques on mobile platforms. **Nice to have:** * Familiarity with and practical experience using reverse engineering tools such as apktool, Ghidra (or IDA Pro), and hexdump. * Experience with assembly languages (e.g., ARM). * Familiarity with malware analysis techniques on mobile platforms. * Understanding of obfuscation and anti\-tampering techniques used in Android apps. * eLearnSecurity Junior Penetration Tester (eJPT). * eLearnSecurity Mobile Application Penetration Tester (eMAPT). * eLearnSecurity Certified Mobile Application Professional (eCMAP). * Offensive Security Certified Professional (OSCP). * Other relevant certifications in penetration testing, mobile security, or reverse engineering. **The Cognizant community:** We are a high caliber team who appreciate and support one another. Our people uphold an energetic, collaborative and inclusive workplace where everyone can thrive. * Cognizant is a global community with more than 300,000 associates around the world. * We don’t just dream of a better way – we make it happen. * We take care of our people, clients, company, communities and climate by doing what’s right. * We foster an innovative environment where you can build the career path that’s right for you. **About us:** Cognizant (Nasdaq: CTSH) is an AI Builder and technology services provider, building the bridge between AI investment and enterprise value by building full\-stack AI solutions for our clients. Our deep industry, process and engineering expertise enables us to build an organization’s unique context into technology systems that amplify human potential, realize tangible returns and keep global enterprises ahead in a fast\-changing world. See how at www.cognizant.com or @cognizant. Cognizant is an equal opportunity employer. Your application and candidacy will not be considered based on race, color, sex, religion, creed, sexual orientation, gender identity, national origin, disability, genetic information, pregnancy, veteran status or any other characteristic protected by federal, state or local laws. If you have a disability that requires reasonable accommodation to search for a job opening or submit an application, please email CareersNA2@cognizant.com with your request and contact information. *Disclaimer:* *Compensation information is accurate as of the date of this posting. Cognizant reserves the right to modify this information at any time, subject to applicable law.* *Applicants may be required to attend interviews in person or by video conference. In addition, candidates may be required to present their current state or government issued ID during each interview.* d