Marcin Zielonka
Senior Software Engineer at VirtusLab
Krakow, Lesser Poland Voivodeship
Summary
👤
Senior🎓
Top SchoolMarcin Zielonka is a Senior Software Engineer based in Krakow with nine years of experience building reliable, high-availability backend systems and user-facing visualizations. He has a strong Java/Kotlin background (Java 11–17, Kotlin 1.8) and hands-on experience designing extensible APIs and AST-based code transformations for automated test generation. At VirtusLab he has driven both service-level observability and an internal E2E testing framework while also delivering Next.js/TypeScript data visualization work and PDF reporting. Earlier roles at Akamai sharpened his skills in large-scale, low-latency web performance products and customer-facing incident response. Comfortable across the full stack, he pairs pragmatic refactoring and performance optimizations with test-first engineering practices. Colleagues rely on him for turning legacy, error-prone systems into maintainable, production-grade services.
9 years of coding experience
4 years of employment as a software developer
Bachelor of Engineering - BE Informatyka, Bachelor of Engineering - BE Informatyka at AGH University of Krakow
English, Spanish, German, Polish
Stackoverflow
36reputation
943reached
3answers
0questions
Github Skills (21)
oauth2-resource-server10
spring-boot-starter9
resource-server9
bit8
spring-boot8
dependency-injection6
mockito6
multi-tenant6
junit6
multitenancy6
spring6
java6
git-addons5
kotlin3
javalin3
Programming languages (4)
Github contributions (5)
mzlnk/Understandable
Nov 2016 - Apr 2019
Contributions:281 commits in 2 years 5 months
BIT-Java/bitjava-2020-2021
Oct 2020 - Jan 2021
Materials used during BIT Java classes at AGH UST in academic year 2020/2021
Contributions:24 commits, 12 PRs, 16 pushes in 2 months
aghyear-2020bit2020-2021ust
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