Dusan Bernat
Freelance Software Engineer at IT-Bernat
Hamburg, Germany
Summary
👤
Senior🎓
Top SchoolDusan Bernat is a freelance software engineer based in Hamburg with over 20 years of hands-on experience and a decade focused on enterprise-grade backend and cloud systems. He specializes in full-stack development with .NET, Java Spring and Angular, and has driven microservices and domain-driven design initiatives at scale during senior roles at Amadeus and Sabre. Recent work centers on Generative AI—NLP, LLMs, RAG and early agentic AI projects—paired with practical cloud-native deployments on Azure and AWS. An active contributor to the DHIS2 core, he has applied deep Java expertise to improve aggregation, validation and analytics in a widely used open-source health information platform. Known for bridging legacy systems to modern architectures, he brings a pragmatic blend of systems thinking, AI curiosity and production-grade engineering.
10 years of coding experience
22 years of employment as a software developer
Master of Science (MSc), Pedagogy(IT), Master of Science (MSc), Pedagogy(IT) at University Bratislavathe general higher education entrance qualification, the general higher education entrance qualification at Gymnasium Banska Bystrica, Czechoslovakia
Stackoverflow
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0reached
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Github Skills (12)
javas10
analytics10
java10
spring-boot10
postgresql9
hibernate9
rest-api8
api-rest8
maven8
restful-api8
api-design8
testing7
Programming languages (4)
Github contributions (5)
dhis2/dhis2-core
Apr 2021 - Jan 2023
DHIS 2 Core. Written in Java. Contains the service layer and Web API.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:703 reviews, 253 commits, 613 PRs in 1 year 9 months
Contributions summary:Dusan's commits primarily focused on enhancing the DHIS2 core. Their work included implementing and refining core functionalities, as evident in the "feat" commits allowing for file resource aggregation and the addition of relative period for the last 10 years. Additionally, the user addressed several bug fixes, including issues related to event analytics and report generation. The user demonstrated expertise in Java, as reflected in the code changes within the DHIS2 core, covering areas like validation and aggregation.
apidhishibernatemavenspring-mvc
d-bernat/CheersGdxGame
May 2017 - Dec 2017
Contributions:2 PRs, 366 pushes, 4 branches in 7 months
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