Bartosz Spyrko-smietanko
Software Engineer at Atlassian
Warsaw, Masovian Voivodeship, Poland
Summary
🤩
RockstarBartosz Spyrko-smietanko is a software engineer with 11 years of hands-on backend experience, now based in Warsaw and currently at Atlassian. He’s a strong contributor to major Java server projects—WildFly, WildFly Core, RESTEasy and Undertow—focusing on server-side robustness, authentication/error reporting, multipart/servlet handling, and media-type correctness. His work demonstrates deep expertise in Java application servers, HTTP/2 and webserver internals, plus test-driven fixes like PostConstruct detection and CompletableFuture support. Known for pragmatic bug fixes that improve production reliability, he blends careful unit-test improvements with protocol-level hardening. A less obvious strength is his attention to user-facing failure diagnostics—ensuring root causes and unavailable service lists are surfaced to aid operations.
11 years of coding experience
Stackoverflow
36reputation
123reached
1answer
0questions
Github Skills (42)
jakartaee10
unit-testing10
debugging10
api-rest10
debug10
web-application10
api-design10
restful-api10
jsp10
http10
rest-services10
jboss10
webpages10
undertow10
web-content10
Programming languages (8)
Github contributions (5)
undertow-io/undertow
Mar 2018 - Apr 2021
High performance non-blocking webserver
Role in this project:
Back-end Developer
Back-end DeveloperContributions:23 commits, 17 PRs, 17 comments in 3 years 1 month
Contributions summary:Bartosz primarily focused on fixing bugs and implementing features related to the Undertow webserver's servlet and multipart handling capabilities. Their contributions include addressing issues with the `MultipartConfig` attribute, improving the handling of path resetting after forward operations, and correcting parameter count inconsistencies in file uploads. They also made changes related to header validation in HTTP/2 frames, improving the server's robustness.
golangnon-blockingsslweb-serverperformance
wildfly/wildfly-core
Feb 2016 - Feb 2021
The core runtime that is used by the WildFly application server
Role in this project:Back-end Developer
Back-end DeveloperContributions:18 reviews, 39 commits, 36 PRs in 5 years 1 month
Contributions summary:Bartosz primarily focused on bug fixes and code improvements related to the WildFly core runtime environment. Their commits addressed issues such as detachment of the jbossas process in EAP init scripts, handling of non-ASCII characters in web console passwords, and the reporting of service failures. The user also contributed to improving the error reporting within the system, adding features like a list of unavailable services to failure descriptions and ensuring root causes of deployment failures were always reported.
wildflymavenruntimerundeckweblogic
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