Andrzej Grzesik
Co-Founder at Conferences
London, England, United Kingdom
Summary
🤩
Rockstar🎓
Top SchoolAndrzej Grzesik is a seasoned software engineer and co-founder based in London with 14 years of experience building distributed systems and backend platforms across finance, retail, and simulation domains. He has held senior engineering and leadership roles at Revolut, LMAX Group, eBay and Burberry, combining hands-on engineering with team and architecture leadership. An active conference speaker and long-time community contributor, he’s presented at major Java events worldwide and helps run GeeCON. He contributes to notable open-source projects such as R3’s Corda—improving logging, configuration and testing in a production-grade blockchain codebase—highlighting his attention to reliability and observability. Comfortable in polyglot environments (Java, Scala, Go) and big-data ecosystems (Hadoop, Spark), he blends practical production experience with a product-minded approach. His background in computer science and econometrics gives him a pragmatic edge for solving complex technical problems with business impact.
14 years of coding experience
14 years of employment as a software developer
MSc, Computer Science and Econometrics, MSc, Computer Science and Econometrics at Krakow University of Economics
English, Polish
Stackoverflow
16reputation
1kreached
2answers
0questions
Github Skills (12)
kotlin10
configuration-management10
slf4j10
jtest9
junit9
javas8
hocon8
java8
angular-ui6
encryption6
vigenere6
angularjs6
Programming languages (11)
Github contributions (5)
corda/corda
Feb 2018 - Mar 2018
Corda is an open source blockchain project, designed for business from the start. Only Corda allows you to build interoperable blockchain networks that transact in strict privacy. Corda's smart contract technology allows businesses to transact directly, with value.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:25 commits, 19 PRs, 49 pushes in 1 month
Contributions summary:Andrzej primarily contributed to the Corda codebase by addressing various issues and implementing improvements related to logging, configuration, and testing. They updated logging configurations, including the integration of Jolokia with Slf4j, and corrected issues with config file parsing. Further work involved improving testing by ignoring flaky tests and modifying test configurations. Additionally, the user made adjustments to documentation and code formatting.
blockchainblockchain-networkcordasmart-contractskotlin
ags313/dcs-dtc
Dec 2023 - Jun 2026
Contributions:2 reviews, 3 PRs, 59 pushes in 2 years 6 months
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