Christian Kohlschütter
Self Employed at Kohlschütter Search Intelligence
Germany
Summary
🤩
Rockstar🎓
Top SchoolChristian Kohlschütter is a Principal Software Engineer and researcher with over two decades of experience building production-grade search systems, vertical search, and digital libraries. He holds a PhD in Computer Science and has applied web science research to real-world products since the early 2000s, founding NewsClub and later running his own consultancy, Kohlschütter Search Intelligence. At Apple he invented and shipped unsupervised on-device machine learning that now runs on over a billion devices, and at Evernote he architected a multilingual, per-user search platform serving 100M+ users while cutting petabytes of I/O. His open-source contributions include performance and GraalVM compatibility improvements to the widely used Jetty project and core work on Boilerpipe. Christian combines deep academic rigor with relentless pragmatism—favoring simple, stylish solutions that scale to billions—and maintains a focus on on-device intelligence and unsupervised AI. Based in Germany, he blends research, engineering, and product instincts to make information reliably discoverable.
16 years of coding experience
24 years of employment as a software developer
Diplom-Informatiker (FH) Technische Informatik / Applied Computer Sciences, Diplom-Informatiker (FH) Technische Informatik / Applied Computer Sciences at Fachhochschule HofDr. rer. nat. (PhD) Informatik / Computer Sciences, Dr. rer. nat. (PhD) Informatik / Computer Sciences at Leibniz Universität HannoverAbitur Gr. Latinum Graecum, Abitur Gr. Latinum Graecum at Jean-Paul-Gymnasium Hof
German, English, Ukrainian, Russian
Stackoverflow
3,047reputation
178kreached
27answers
0questions
javascript
top-5%
html
top-5%
Github Skills (24)
url-encoding10
urn10
graalvm10
resource-management10
java10
javas10
http-server10
sax10
html-parsing10
uri10
reflection9
javascript9
servlet9
asp-net9
html9
Programming languages (10)
Github contributions (5)
kohlschutter/boilerpipe
Dec 2009 - Aug 2015
Work in progress transmit from Google Code
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:186 commits, 3 PRs, 2 pushes in 5 years 9 months
Contributions summary:Christian primarily contributed to the core functionality and features of the `boilerpipe` project. Their commits involved modifying code to address dependencies, adding new functionality, and fixing bugs. These changes included modifying parser behavior, and introducing new classes.
translationin-progresswork-in-progresstransmit
jetty/jetty.project
Jan 2023 - Jan 2023
Eclipse Jetty® - Web Container & Clients - supports HTTP/2, HTTP/1.1, HTTP/1.0, websocket, servlets, and more
Role in this project:Back-end Developer
Back-end DeveloperContributions:18 reviews, 14 commits, 14 PRs in 14 days
Contributions summary:Christian primarily contributed to the core utilities and resource handling aspects of the Jetty project, specifically focusing on improving the performance and compatibility with GraalVM Native Image. They refactored code to use method references instead of reflection for performance gains and addressed issues related to classpath resource loading within GraalVM. Furthermore, they added support for resource schemes and corrected URI handling to resolve compatibility problems. The user also made adjustments to DefaultServlet and other components to address specific issues related to data handling and double-encoding.
j2eeleiningenponylanghttp2-pushmhealth
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