Maciej Ziarko
Senior Software Engineer Tier 1 Investment Bank at VirtusLab
Warsaw, Masovian Voivodeship, Poland
Summary
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Senior🎓
Top SchoolMaciej Ziarko is a Senior Software Engineer with 11 years of experience building and automating developer tooling for top-tier investment banks, currently contracting via VirtusLab for a major American firm. He specializes in CI/CD, Jenkins, Docker, Python, and software supply chain security, delivering solutions used by over 10,000 developers across large organizations. His background includes hands-on roles at Morgan Stanley and J.P. Morgan, giving him deep domain knowledge of financial workflows and enterprise-scale delivery. An active contributor to open-source quality tooling, he has improved CodeNarc rules and test automation to enhance code maintainability. Based in the Warsaw metro area, he focuses on B2B, remote work and is not open to relocation. Colleagues rely on him for pragmatic automation that balances rapid feature delivery with rigorous security and testing.
11 years of coding experience
8 years of employment as a software developer
Bachelor of Engineering, Computer Science, 5 (very good), Bachelor of Engineering, Computer Science, 5 (very good) at Warsaw University of Technology
English, Polish
Stackoverflow
11,714reputation
2.2mreached
85answers
37questions
spring-security
top-5%
spring
top-5%
java
top-5%
python
top-5%
html
top-5%
Github Skills (18)
groovy10
software-quality10
junit10
testing9
java9
spring9
python9
spring-security9
html9
pow6
math6
spring-mvc6
x866
algorithm6
authentication6
Programming languages (2)
Github contributions (5)
CodeNarc/CodeNarc
Nov 2014 - Dec 2014
CodeNarc source
Role in this project:
Back-end Developer & Test Automation Engineer
Back-end Developer & Test Automation EngineerContributions:8 commits in 1 month
Contributions summary:Maciej primarily contributed to the `codenarc/codenarc` repository by fixing bugs and enhancing the code quality rules. Their work involved modifying existing rules for code formatting, specifically focusing on spaces around braces and the handling of closures within GStrings. The user also implemented JUnit test support for verifying exceptions and introduced a new rule for parameter count validation, which demonstrates a focus on code maintainability.
blockchaincodenarc
MaciejZiarko/GoEuroDevTest
Apr 2015 - Apr 2015
Contributions:6 pushes, 1 branch in 1 day
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