Jörg Müller
CEO at TOPSYS Ltd.
Dusseldorf, North Rhine-Westphalia, Germany
Summary
👤
Senior🎓
Top SchoolJörg Müller is an experienced CEO and Java backend architect with 14+ years in IT and a career stretching back to the 1990s, building secure, scalable cloud-native microservice architectures and optimizing runtime performance for cost-effective operations. He combines hands-on development with deep security expertise—offering code audits and hardened designs informed by reviewing millions of lines of legacy and modern code. His background spans enterprise systems, medical and travel platforms, Android apps, and complex update/packaging and certificate management solutions, demonstrating versatility across domains and stacks. Based in Düsseldorf, he works as a freelance expert and company leader, favoring result-oriented engagements and long-term, trustful collaborations. An early adopter of modularization and migration strategies, he often uncovers hidden technical debt and turns it into maintainable, auditable systems.
14 years of coding experience
5 years of employment as a software developer
Diplom, Informatik, Diplom, Informatik at Universität Koblenz-Landau
German, English
Github Skills (4)
consumption10
organize10
gpgme7
r-package3
Programming languages (3)
Github contributions (5)
jmueller17/sociometrics
May 2018 - Aug 2020
Contributions:1 release, 38 commits, 31 pushes in 2 years 4 months
jmueller17/LimeRLabel
Sep 2020 - Dec 2021
Contributions:19 commits, 17 pushes, 1 branch in 1 year 3 months
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