Maciej Walkowiak
Senior Java Consultant at Freelance
Berlin, Germany
Summary
🤩
Rockstar🎓
Top SchoolMaciej Walkowiak is a Senior Java consultant and full-stack engineer based in Berlin with 13+ years building scalable Java, Spring and AWS systems for startups and enterprises. He blends hands-on architecture and delivery—helping teams adopt Continuous Delivery, Trunk-Based Development and Agile practices—with day-to-day coding, contributing to notable open-source projects like Sentry’s Java SDK and Spring Cloud AWS. As a former Senior Java Developer at Sentry and longtime freelance architect, he’s experienced in integrations (SQS, S3), SDK work, and improving JVM tooling and test infrastructure. A tech YouTuber and conference speaker, he also mentors and taught refugees Java, revealing a commitment to community and practical knowledge transfer beyond his consulting work.
13 years of coding experience
16 years of employment as a software developer
MS, computer science, MS, computer science at West Pomeranian University of Technology in Szczecin
English, Polish
Stackoverflow
12,672reputation
1.4mreached
183answers
1question
spring-mvc
top-5%
jackson
top-5%
java
top-1%
tomcat
top-5%
mongodb
top-5%
spring-data
top-5%
Github Skills (41)
wsdl10
spring10
amazon-sqs10
testing10
xsd10
amazon-web-services10
message-queue10
java10
webservice10
soap10
javas10
sdk10
aws10
spring-boot10
spring-cloud10
Programming languages (17)
Github contributions (5)
awspring/spring-cloud-aws
Mar 2022 - Jan 2023
The New Home for Spring Cloud AWS
Role in this project:
Backend Developer
Backend DeveloperContributions:25 releases, 385 reviews, 30 commits in 10 months
Contributions summary:Maciej primarily contributed to the backend aspects of the Spring Cloud AWS project, specifically upgrading dependencies like Testcontainers and Localstack. They addressed issues, like fixing failing tests, related to the integration with AWS services by updating test dependencies. Additionally, the user added a getLocation method to the S3Resource class and made general polish and refactoring changes throughout the codebase.
springspring-cloud-awsawsspring-bootspring-cloud
getsentry/sentry-java
Jul 2020 - Jul 2022
A Sentry SDK for Java, Android and other JVM languages.
Role in this project:Back-end Developer
Back-end DeveloperContributions:466 reviews, 284 commits, 358 PRs in 1 year 11 months
Contributions summary:Maciej primarily focused on improving the core functionality of the Java Sentry SDK by addressing critical issues. Their work included restructuring directory structures for sample applications, resolving issues related to JVM shutdown, and improving the efficiency of the logging system by including stack traces. They also added a new method to add a breadcrumb and included a new sample console application.
androidjavajvm-languagessentrylogback
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