Krzysztof Kocel
Staff Engineer at Paramount
Warsaw, Masovian Voivodeship, Poland
Summary
🤩
Rockstar🎓
Top SchoolKrzysztof Kocel is a Staff Engineer based in Warsaw with 11 years of experience building backend systems, voice applications and Android products across large consumer platforms and startups. He combines pragmatic object-oriented design and clean, testable code with deep expertise in Java/Kotlin, Spring Boot, Android, and cloud-native tooling (Docker, AWS, Testcontainers). At Paramount he led Alexa and Google Assistant voice experiences and has contributed important verifications and refactors to high-profile open-source projects such as the Alexa Skills Kit SDK for Java and Allegro’s Gradle axion-release plugin. Comfortable across the full stack, he also brings strong networking, security and database know-how (HTTP/SIP/RTSP, SSL pinning, PostgreSQL/MySQL/SQLite) and a history of improving CI/CD and testing practices. As a co-founder of OpenBrewery he built CQRS microservices and spoke at conferences, showing he balances product thinking with hands-on engineering. Colleagues rely on him for pragmatic architecture, automation and mentoring that make complex integrations reliable and maintainable.
11 years of coding experience
18 years of employment as a software developer
V Liceum Ogólnokształcące im. ks. Józefa PoniatowskiegoM.Sc. Computer Science Electronics, M.Sc. Computer Science Electronics at Warsaw University of Technology
English, Russian
Stackoverflow
25,603reputation
3.0mreached
137answers
344questions
adb
top-5%
spring-boot
top-5%
java
top-5%
android
top-1%
android-intent
top-5%
Github Skills (34)
testing10
alexa-skills-kit10
java10
servlet10
javas10
sdk10
androidmanifest10
spock10
android10
gradle-plugin10
release-automation10
gradlew10
release-candidate10
releasenotes10
gradle10
Programming languages (14)
Github contributions (5)
alexa/alexa-skills-kit-sdk-for-java
Jul 2019 - Apr 2022
The Alexa Skills Kit SDK for Java helps you get a skill up and running quickly, letting you focus on skill logic instead of boilerplate code.
Role in this project:
Back-end Developer & Test Automation Engineer
Back-end Developer & Test Automation EngineerContributions:5 reviews, 21 commits, 10 PRs in 2 years 9 months
Contributions summary:Krzysztof focused on enhancing the `alexa-skills-kit-sdk-for-java` repository, specifically by adding an abstraction layer over the servlet interface. Their work involved creating and modifying test cases to ensure the correct functioning of the verifiers. Further contributions included refactoring and improving the code related to request verification, including signature and timestamp verifications, and addressing documentation inconsistencies.
alexa-skills-kitboilerplateamazon-alexa-skillamazon-echoboilerplate-code
allegro/axion-release-plugin
Feb 2019 - May 2022
Gradle release & version management plugin.
Role in this project:Back-end Developer & Automation Engineer
Back-end Developer & Automation EngineerContributions:7 reviews, 14 commits, 10 PRs in 3 years 3 months
Contributions summary:Krzysztof primarily focused on improving the build and release process of the Gradle plugin. They updated dependencies (Gradle, Groovy, Spock), integrated Testcontainers for integration tests, and refactored test configurations. Additionally, the user addressed issues with the output of task information and fixed the remote rejection test. They demonstrated expertise in Gradle plugin development, testing, and CI/CD practices.
gradlegradle-releaserelease-automationsemantic-versioningversioning
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