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Senior Reverse Engineer (Hybrid - Barcelona)

00067191341

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.

What we offer

  • The chance to work with impact. Here, you’re empowered to bring your biggest thinking to help our company and clients improve everyday life.
  • Ownership over your career. Stay at the top of your game through our award-winning learning and development ecosystem. And when your ambitions change or we offer new opportunities, we help you pivot by providing reskilling, on-the-job learning and guidance to find new roles that might be a better fit.
  • The opportunity to thrive on a high caliber team with heart. We celebrate each other’s experiences and perspectives and promote a sense of belonging through our affinity groups and diversity and inclusion initiatives.
  • A comprehensive total rewards package, including a competitive salary and a pension plan with matching contributions.
  • Flexible health and financial benefits to support you and your eligible dependents—from day one.
  • True work-life balance. Be at your best through paid time off, flexible work arrangements, volunteering opportunities, social events, and so much more.  

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.

Other employment-related information
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, provincial or local laws.

If you have a disability that requires reasonable accommodation to search for a job opening or submit an application, please email [email protected] with your request and contact information.

Language requirements vary depending on roles, but we ask that all candidates have basic English proficiency for company-wide communications purposes. For roles based in Quebec, professional English proficiency is required, as you’ll deliver services to and collaborate with stakeholders outside the province who may not speak French.

Your path to Cognizant

Wondering what to expect after you apply? Here’s a peek at our recruitment process—and keep in mind that not all candidates advance through every step and the process may vary depending on your role and location.

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Step 1: Application

Find an open role that aligns with your skills and career goals and show us why you’re the person for the job. Consider joining our Talent Community if you don’t find the right opportunity.

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Step 2: Recruiter call

If one of our recruiters sees a fit, they’ll set up a short introductory call to learn more about you and how your experiences and skills align with the role.

Step 3: Interview(s)

If you and our team would like to continue the process, you’ll meet with one of our hiring managers. Some roles may also require technical assessments and/or client interviews.

Step 4: Final decision

Our hiring team will then review each candidates’ potential to succeed in the role. This process may take some time because we want to get it right—but you can count on us to keep you updated.

Benefits that help you thrive and grow

Our teams achieve incredible things when they feel fully supported. That’s why our benefits program is built around the diverse needs of our people—so they can enjoy a fulfilling, balanced and healthy life.

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Financial wellbeing

Financial wellbeing

We regularly review market data to ensure compensation is competitive and reflects the value you bring. Your benefits extend beyond pay and may include retirement plans, financial education, discount programs, etc.

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Physical and mental wellbeing

Physical and mental wellbeing

We empower you to prioritize your wellbeing through paid time off, flexible working where possible, healthcare plans, counselling, our Mental Health Allyship program and more. 

Your Career, Your Way
Your career, your way

Your career, your way

With 90% of our associates building skills through GenAI training, job shadowing, industry certifications and more, you have everything you need to build a full career.

Professionals
Real-world impact

Real-world impact

Think about the biggest brands you rely on. Chances are, they rely on us to help strengthen their business. Here, you’ll turn bold ideas into solutions that improve lives everywhere.

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