Paweł Kaczorowski
Senior System Engineer at Klar
Białystok, Podlaskie Voivodeship, Poland
Summary
👤
Senior🎓
Top SchoolPaweł Kaczorowski is a Senior System Engineer with 11+ years of experience designing and operating scalable data and cloud systems across Java, Scala, Python and TypeScript stacks. He has led end-to-end delivery of production serverless platforms on GCP, built resilient Spark-based data pipelines, and shipped full-stack features from backend APIs to frontend integrations. Comfortable both as a hands-on developer and as a team lead, he pairs fast iteration and pragmatic engineering with strong observability and CI/CD practices. His background ranges from early Java enterprise systems to modern Airflow/Kubernetes and prompt-engineered generative AI workflows, showing a steady evolution toward cloud-native data products. An active contributor to community projects, he implemented nuanced backend mailing-address management in the JVM Bloggers repo, reflecting attention to UX details even in infrastructure work. Based in Białystok, Poland, he brings a pragmatic, safety-first mindset—“trying not to break things”—to high-availability systems.
11 years of coding experience
8 years of employment as a software developer
Master of Science (MSc) Telecommunication, Master of Science (MSc) Telecommunication at Warsaw University of TechnologyErasmus Computer Science, Erasmus Computer Science at Instituto Superior Técnico
Polish, English
Stackoverflow
51reputation
1kreached
0answers
1question
Github Skills (15)
javas10
wicket10
java10
spring-boot10
web-development9
databases8
unit-testing8
database8
java-persistence-api7
jpa7
blogpost6
gwt6
microblogging6
blogger6
file-upload6
Programming languages (4)
Github contributions (5)
jvm-bloggers/jvm-bloggers
Oct 2016 - Nov 2016
JVM Bloggers - website and newsletter with JVM blogs from Poland
Role in this project:
Back-end Developer
Back-end DeveloperContributions:8 commits, 7 PRs, 22 comments in 1 month
Contributions summary:Paweł primarily contributed to the development of the mailing address management feature within the JVM Bloggers project, including creating, editing, and deleting mailing addresses. They implemented Wicket-based UI components and validators for address uniqueness. The user also worked on integrating the new mailing address feature into the existing framework. Several code formatting changes were applied, including adjustments to indentation, line breaks, and imports to enhance code readability.
bloggersjvmbloggingakkapoland
kaczors/jvm-bloggers
Sep 2016 - Oct 2017
Contributions:13 pushes, 9 branches in 1 year
bloggersjvmbackendfrontendjava
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