Ahti Kitsik
CEO, Chief Engineer at Arxpoint GmbH
Berlin, Germany
Summary
👤
Senior🎓
Top SchoolAhti Kitsik is a Berlin-based CEO and chief engineer with 19 years of experience building analytics- and data-driven products and leading engineering teams. As founder of Arxpoint and prior CEO of Codehoop, he combines hands-on backend development in Java and Python with product leadership, cloud deployments (AWS/GCP), and strategic client delivery. He is a long-term open-source contributor to the Drools/Kogito projects, improving core rule-engine internals and debuggers—work that reflects deep understanding of runtime performance and expression-language tooling. Ahti has mentored at deeplearning.ai and Google Summer of Code, signaling a commitment to developer education alongside commercial work. His background in migrating large legacy systems and shipping reliable server-side platforms means he thrives on untangling complex architectures and making them operable in production.
19 years of coding experience
18 years of employment as a software developer
Master's degree, Computer Science, Master's degree, Computer Science at TalTech – Tallinn University of Technology
Stackoverflow
794reputation
31kreached
2answers
0questions
windows
top-5%
anaconda
top-5%
pycharm
top-5%
Github Skills (19)
debugging10
debug10
drools10
mvel10
java10
rule-engine10
javas10
dmn9
windows9
anaconda9
pycharm9
test-automation8
workflow-engine8
bpmn7
eclipse6
Programming languages (17)
Github contributions (5)
apache/incubator-kie-kogito-runtimes
Nov 2006 - Feb 2009
Kogito Runtimes - Kogito is a cloud-native business automation technology for building cloud-ready business applications.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:16 commits in 2 years 3 months
Contributions summary:Ahti primarily contributed to the Drools engine, focusing on debugging and enhancing the MVEL debugger. Their work involved adding and refining debugging features, including breakpoints and step-over functionality, within the MVEL consequence builder. They also addressed issues related to debug symbol generation. Additionally, the user modified various core Drools files.
kogitoknativebusiness-automationrule-enginedrools
apache/incubator-kie-drools
Nov 2006 - Feb 2009
Drools is a rule engine, DMN engine and complex event processing (CEP) engine for Java.
Role in this project:Back-end Developer
Back-end DeveloperContributions:16 commits in 2 years 3 months
Contributions summary:Ahti primarily contributed to the Drools rule engine, focusing on core functionality and debugging efforts. Their commits involved migrating components, removing dependencies, and fixing issues within the rete viewer, which suggests a focus on performance and internal architecture. The user also addressed issues related to MVEL debugging symbols, demonstrating a strong understanding of the expression language used within the Drools framework. Furthermore, the user made improvements and enhancements to the MVEL debugger, and tests.
droolsbusiness-rulesdmn-engineevent-processingcomplex-event-processing
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