Mateusz Lisik
Owner, Software Engineer at Lisik.IT
Subcarpathian Voivodeship, Poland
Summary
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SeniorMateusz Lisik is an experienced backend engineer and owner of Lisik.IT with 12 years in software development and 8 years focused on backend architecture and delivery. He favors long-term engagements where deep product understanding drives better software, and he handles the full lifecycle from contract negotiation to deployment as a one-man shop. At Essyo he progressed from developer to solutions architect, shaping technical analysis, milestones, and architecture decisions for production systems. His open-source contributions include work on the widely used AWS Java SDK, where he contributed to Amazon S3 client functionality and maintenance fixes. Based in Subcarpathian Voivodeship, Poland, he thrives on taking new technical challenges and translating client needs into pragmatic, long-lived solutions.
12 years of coding experience
7 years of employment as a software developer
Polish, English
Stackoverflow
416reputation
11kreached
14answers
10questions
Github Skills (16)
javas10
java10
amazon10
cloud-storage10
aws-sdk10
object-oriented-programming9
api-design8
git6
docx4j6
jakartaee6
jboss6
playframework6
jackson6
spring6
6
Programming languages (11)
Github contributions (5)
aws/aws-sdk-java
Jan 2016 - Jan 2016
The official AWS SDK for Java 1.x (In Maintenance Mode, End-of-Life on 12/31/2025). The AWS SDK for Java 2.x is available here: https://github.com/aws/aws-sdk-java-v2/
Role in this project:
Back-end Developer
Back-end DeveloperContributions:7 commits, 1 PR, 4 comments in 22 days
Contributions summary:Mateusz primarily contributed to the Amazon S3 SDK for Java, adding and modifying methods within the `AbstractAmazonS3` and `AmazonS3Client` classes. Their work involved implementing or abstracting methods related to object existence checks and overall object management, including the introduction and subsequent removal of a specific feature. They also fixed auto-import optimizations.
amazonaws-sdksdkawsjava
matteprl/resume
Sep 2015 - May 2021
Contributions:14 pushes, 1 branch in 5 years 9 months
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