Senior Java R&D Software Engineer – Leuven @ Guardsquare in Leuven (BE)


016 92 06 46

Passionate about software engineering, compiler technology and Java? You are excited to solve challenging problems and build cool software that is used on billions of devices? Join our Java team!


Our technology

We develop the successful open-source project ProGuard and the cutting-edge security product DexGuard. Using compiler technology, obfuscation, encryption and optimization techniques we make Java and Android applications smaller, faster and more hardened against reverse engineering and tampering.   


Required skills

  • Deep knowledge of Java

Useful skills

  • Experience with Linux
  • Interest in low level programming
  • Knowledge of compiler technology (Java bytecode, complex application processing) or knowledge of obfuscation or optimization technologies
  • Knowledge of information security
  • Experience with reverse engineering and the commonly used tools
  • Familiarity with Android and the Android build tools: Gradle, ProGuard



We are looking for a Master in Computer Science (or equivalent practical experience) with good verbal and written communication skills in English.



Guardsquare is a software product company with small international teams that solve challenging problems and create high quality products. You will be part of the team working on our open source product ProGuard, our commercial product DexGuard, and new products based on Java technology. This will give you a ton of opportunities to have a direct impact on the products, features and workflow. New techniques you come up with for the next wave of optimization and hardening could potentially be in use at really big companies within a couple of weeks (among our customers are many of the biggest payment processors, banks, social media companies…). Every team member designs, develops, maintains and improves our software and provides  email support to our customers. They also get the opportunity to research the latest compiler and mobile security technology.


What Guardsquare offers you


  • A full time job with a competitive salary package
  • You are provided with the tools & flexibility to develop yourself successfully 
  • An international environment where you will interact with motivated & open colleagues with different backgrounds
  • A workplace where you can share and implement your ideas
  • A hybrid work policy, which helps guarantee an excellent work-life balance


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.


So, what are you waiting for? Join us! 

You can apply for this opportunity by filling out the application form below! 



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 Gent (Belgium), Boston (USA) and Munich (Germany).