Tomas Brejla
Prague, Czechia
Summary
🤩
Rockstar🎓
Top SchoolTomas Brejla is a seasoned Java/JEE and Clojure developer with over 11 years building large distributed systems for retailers, telcos and financial platforms from Prague. He has deep backend expertise across modern JVM stacks (Java 8–21, Kotlin, Spring Boot, Hibernate), microservices, databases (Postgres, MS SQL) and Kubernetes, alongside significant ATG/commerce and integration experience from earlier enterprise projects. Tomas pairs this with front-end and integration skills (HTML/JS/CSS, XML/WS, SOAP, Apache Camel) and practical DevOps know-how including Docker, CI tooling and Unix administration. He contributes to open-source tooling too—optimizing REPL output performance in the popular Calva VS Code extension—showing attention to latency and developer ergonomics. Known for delivering technical trainings and internal developer tools, he blends hands-on coding with mentoring and system design. Pragmatic and detail-oriented, he thrives on solving performance bottlenecks and turning complex integration requirements into reliable production services.
12 years of coding experience
24 years of employment as a software developer
IT, IT at National Dong Hwa University (NDHU)Master degree, Information management, Master degree, Information management at University of Hradec KrálovéGymnázium Benešov
Czech, English
Github Skills (8)
clojure10
vscode-extension10
clojure-cli10
clojurescript10
batching9
batch9
testing8
lodash7
Programming languages (8)
Github contributions (5)
BetterThanTomorrow/calva
Jun 2021 - Jul 2021
Clojure & ClojureScript Interactive Programming for VS Code
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1 review, 6 commits, 4 PRs in 1 month
Contributions summary:Tomas primarily focused on improving the performance of the Clojure REPL output within the Calva VS Code extension. Their work involved optimizing the way output events are handled, specifically by batching them to reduce latency. They implemented changes to efficiently manage and append text to the results document, including the introduction of a queueing mechanism and the use of `takeWhile` for output batching. Additionally, the user refactored code and added test cases.
clojureclojurescriptinteractive-programmingvscode
brdloush/menu-fillova
Feb 2024 - Jul 2025
Contributions:59 pushes in 1 year 5 months
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