Java R&D Software Engineer - Leuven

Summary

We are looking for a passionate Java Software Engineer with a strong interest in software security and low-level software engineering to join our R&D team in Leuven, working on our Java based products, such as ProGuard and DexGuard.

Our technology processes and transforms Java and Android applications using techniques such as bytecode analysis, obfuscation, optimization, encryption, and code hardening to make applications smaller, faster, and more resilient against reverse engineering and tampering.

The ideal candidate enjoys solving complex technical problems, working with challenging codebases, and experimenting with new ideas. You’ll have the opportunity to research new optimization and code hardening techniques and turn promising concepts into production-ready solutions.

Responsibilities

• Maintain and improve our Java-based technology, including ProGuard and DexGuard.
• Research, test, and implement new code hardening techniques.
• Work with Java bytecode, obfuscation, encryption, and application processing.
• Continuously improve code quality through extensive testing.
• Stay up-to-date with reverse engineering and software security practices.
• Support customers with complex technical questions related to our software.

Profile

• Master's degree in Computer Science, Software Engineering, or a related field.
• Ideally 2 to 3 years of experience in a similar software engineering role.
• Excellent Java & Kotlin skills.
• Experience working with complex codebases.
• Interest in low-level programming, debugging, and software security.

Useful Skills

• Knowledge of compiler technology, Java bytecode, or complex application processing.
• Knowledge of obfuscation, optimization, or software protection techniques.
• Experience with reverse engineering and related tools.
• Familiarity with Android, Gradle, or ProGuard.
• Knowledge of information or application security.

What Guardsquare Offers You

• A full-time job with a competitive salary package.
• The tools and flexibility to develop yourself successfully.
• An international environment where you’ll interact with motivated and open colleagues from diverse backgrounds.
• A workplace where you can share and implement your ideas.
• A hybrid work policy that helps ensure an excellent work-life balance.

At Guardsquare, we take pride in being a diverse and multicultural company. You’ll be part of a dynamic team that strives for excellence, encourages collaboration, and focuses on continuous learning and technical growth.

So, what are you waiting for? Join us!

About Guardsquare

Guardsquare offers the most complete approach to mobile application security on the market, covering the full development cycle from mobile app security testing and code hardening to real-time threat detection and API security.

More than 1,000 customers worldwide rely on Guardsquare to identify security risks and protect their mobile applications and SDKs against reverse engineering and tampering.

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