Christian Ullenboom
Unternehmensinhaber at tutego
Sonsbeck, North Rhine-Westphalia, Germany
Summary
👤
Senior🎓
Top SchoolChristian Ullenboom is a Java Champion, author and trainer with over two decades founding and running tutego, a German training company focused on software development and IT topics. He combines deep practical Java expertise—supported by multiple published books and e-learning courses—with a knack for translating complex concepts into teachable material. Based in Sonsbeck, he also leads Digitales Erlebnis-Center GmbH, blending hands-on product work with learning experiences. His background as a Diplom-Informatiker from Universität Paderborn underpins a methodical approach to engineering and technical history, and his career uniquely marries authorship, professional training, and entrepreneurship in the Java ecosystem.
12 years of coding experience
Diplom Informatiker, Information Technology, 1, Diplom Informatiker, Information Technology, 1 at Universität Paderborn
Stackoverflow
1,398reputation
12.4mreached
62answers
7questions
java
top-5%
Github Skills (200)
fill10
immutable-collections10
spring-data10
data-access-layer10
data-access10
plantuml10
diagram10
java10
spring-boot10
ddd10
uml10
vintage10
spring10
datastore10
java-api10
Programming languages (10)
Github contributions (5)
ullenboom/ppt2asciidocslides
Oct 2018 - Mar 2020
Converts slides from PPTX to Asciidoc(tor)
Contributions:2 commits, 1 PR, 6 pushes in 1 year 5 months
pptxasciidoctor
ullenboom/java2cc65-transcompiler
Mar 2015 - Oct 2018
Contributions:1 release, 4 pushes, 1 branch in 3 years 6 months
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.