Internship: C++/LLVM Team: Implement LLVM Obfuscation Transformations @ Guardsquare in Leuven (BE) or Munich (DE)


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Duration: 2+ months



In our C++ teams in Leuven (BE) and Munich (DE) we work on our LLVM-based solution, iXGuard. By applying code transformations, code injection, binary instrumentation, code analysis, and more, this product focuses on hardening iOS applications against reverse engineering, both static analysis and dynamic tampering.



The LLVM compiler framework and its pass system makes it very easy to add additional code transformations to the clang compiler. While these transformations usually optimize or instrument code they can be used for different purposes, e.g. obfuscation of code.

This internship will focus on extending the obfuscation techniques available in iXGuard through LLVM passes. You will have to both research and implement additional techniques.

Some potential transformation examples:

  • Automatically remove logging code (NSLog, printf, …)
  • Various control or data flow obfuscation techniques
  • Lift direct function calls into indirect calls
  • Implement custom calling conventions
  • …  insert your ideas here 😉



  • A general understanding of the compilation process
  • Ability to independently perform structured research
  • C++ experience


About Guardsquare:

Guardsquare offers the most complete approach to mobile application security on the market. Built on the open source ProGuard technology, Guardsquare’s software integrates seamlessly across the development cycle. From app security testing to code hardening to real-time visibility into the threat landscape, Guardsquare solutions provide enhanced mobile application security from early in the development process through publication.

More than 900 customers worldwide across all major industries rely on Guardsquare to help them identify security risks and protect their mobile applications against reverse engineering and tampering.

Guardsquare is based in Leuven (Belgium) with offices in Boston (USA) and Munich (Germany).



At Guardsquare, we take pride in being a diverse and multicultural company with team members representing numerous nationalities. We value different perspectives and opinions throughout the business which has contributed to our being the market leader in mobile application security. 

You will be part of a dynamic team that strives for excellence and focuses on continuous education and enhancement in skills. We encourage & empower our trusted colleagues to share their opinions, actively collaborate, and continue to learn and grow.