Piotr Mierzejewski
Java Software Developer at SAP
Chorzów, Silesian Voivodeship, Poland
Summary
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RockstarPiotr Mierzejewski is a Java software developer with a decade of professional experience, currently working at SAP from Chorzów, Poland. He blends backend Java expertise with strong cloud-native and DevOps skills, contributing to Kubernetes-based projects like Kyma and the retired Kubernetes service-catalog. His open-source work shows a focus on reliability and automation—implementing CRDs and Go controllers, improving CI/CD pipelines, and adding resilience via exponential backoff and client refactoring. Comfortable operating across the stack, he moves between code, infrastructure and testing to ensure stable deployments on GKE/AKS. An unassuming but practical engineer, he often works on the less-visible plumbing that makes distributed systems robust and testable.
10 years of coding experience
Github Skills (20)
kubernetes10
resource-dictionary10
testing10
cicd10
gcp10
go10
kubernetes-pods10
service-catalog10
k8s10
github-ci9
dockers9
apidoc9
bash9
docker9
api9
Programming languages (6)
Github contributions (5)
kyma-project/kyma
Jul 2018 - Apr 2022
Kyma is an opinionated set of Kubernetes-based modular building blocks, including all necessary capabilities to develop and run enterprise-grade cloud-native applications.
Role in this project:
Back-end Developer & DevOps Engineer
Back-end Developer & DevOps EngineerContributions:113 reviews, 157 commits, 347 PRs in 3 years 9 months
Contributions summary:Piotr's commits primarily focus on creating and modifying Kubernetes Custom Resource Definitions (CRDs) and related Go code for a binding usage controller. The user implemented CRDs for managing service catalog and binding usage and added related code in Go. The user also made changes related to the client sets for the controller, indicating work on the backend. The commits suggest involvement in the infrastructure setup and management of the Kyma project.
flexibledevopscloud-foundryopenui5sap-hana
kyma-project/test-infra
Feb 2019 - Jan 2023
Role in this project:DevOps Engineer
DevOps EngineerContributions:6 reviews, 42 commits, 87 PRs in 4 years
Contributions summary:Piotr primarily contributed to the infrastructure and testing aspects of the Kyma project. Their commits focused on creating and modifying jobs for integration testing on GKE and AKS clusters, especially concerning fluentd and stability checker. They also made changes to the CI/CD pipelines and build configurations, ensuring the proper deployment of services and automated tests. Furthermore, the user implemented modifications related to Kyma CLI and control plane integration.
test-kitchenkymatest-infrastructuretestinginfrastructure
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