Senior Mobile Security Engineer

Help us build a cutting-edge software development kit for mobile components — the backbone of our cyber-security products protecting millions of digital banking customers worldwide.

• Build deep-level mobile application protection.
• Enable RASP functionality for mobile applications.
• Work on SDK detecting attack vectors used by fraudsters, like malware detection, screen sharing, etc.
• Reverse engineer iOS applications (Mach-O) and Android applications (Dex, Smali).
• Analyze, modify, and decompile binaries and bytecode.
• Develop tools and scripts to automate reverse engineering tasks.
• Research and evaluate new techniques in mobile malware, obfuscation, and anti-reversing.
• Create software documentation for our components.
• Set up and maintain automation tools for the mobile build ecosystem.

• A fast learner who is interested in mobile platforms and their internal mechanisms.
• Extensive experience with mobile native languages: Kotlin, Java, and Swift. 
• Experience with Objective-C or C/C++ is a plus. 
• Experience with obfuscation, unpacking, or anti-tamper mechanisms is a plus.
• Knowledge of Smali/Dex, Mach-O and binary artifacts is welcome.
• Deep knowledge of iOS and Android platforms.
• Experience with rooting/jailbreaking, reverse engineering of mobile apps, and mobile malware analysis is an advantage.
• Experience with debugging tools (LLDB, GDB, Frida, Objection).
• Familiarity with writing native software for UN*X is a plus.
• Experience with source code management tools: Git, GitHub.
• Understanding of building tools stack: Gradle, JFrog Artifactory, CocoaPods, Swift Package Manager, Jenkins, App Center, GitHub Actions.
• Strong written communication skills in both Czech and English (documentation, tickets, occasional customer support).
• Someone who believes great software requires personal responsibility, patience, and passion.

• How cyber-security protection works in mobile app development.
• Documentation: Markdown, Jekyll, GitHub Pages.

• A strong company vision — creating a refined, high-quality software product with purpose, instead of just using tools to build random software.
• Company MacBook with the top configuration.
• The opportunity to work on software used by millions of people worldwide.
• Full flexibility — work from anywhere, anytime, as long as the work is done.
• Open-source contributions — much of our work is published for the security community as part of a top-quality security project.
• Skilled colleagues to help you grow.
• Salary: 60 000 - 160 000 CZK / month (based on experience).