Karol Lassak
Senior Software Engineer at Kentik
Warsaw, Masovian Voivodeship, Poland
Summary
🤩
Rockstar🎓
Top SchoolKarol Lassak is a Senior Software Engineer with 12 years of experience who operates at the intersection of development and operations, championing security and simplicity in cloud-native systems. He has led large-scale CI/CD automation and GCP provisioning efforts—managing pipelines for thousands of repositories and company-wide Kubernetes clusters—while building backend and middleware services across multiple languages (Java, Python, C++, Perl, PHP, C). At Optiva he architected automated infrastructure and cost-optimization tooling for dozens of products, and at Allegro and Kentik he kept hundreds of microservices production-ready. An active open-source contributor, he has enhanced cloud-custodian’s GCP features and improved the hub4j GitHub API, reflecting a pragmatic focus on cloud governance and integrations. Colocated in Warsaw, he pairs broad systems thinking with an “automate everything” mentality and a knack for turning complex operational challenges into simple, auditable solutions.
12 years of coding experience
15 years of employment as a software developer
Computer science, Computer science at Academy of Humanities and Economics in LodzMechatronic, Mechatronic at Warsaw University of TechnologyComputer science, Computer science at University College DublinComputer science, Computer science at Polish–Japanese Institute of Information Technology
English, Spanish, Polish
Github Skills (22)
python10
apidoc10
cloud-infrastructure10
java10
gcp10
javas10
infrastructure10
github-api10
github-api-v39
rule-engine9
engine9
client-library8
api8
terraform4
microsoft-azure4
Programming languages (20)
Github contributions (5)
hub4j/github-api
Mar 2019 - Apr 2020
Java API for GitHub
Role in this project:
Back-end Developer
Back-end DeveloperContributions:19 commits, 4 PRs, 12 comments in 1 year 1 month
Contributions summary:Karol primarily contributed to the backend of the `github-api` project, focusing on enhancing the API's functionality. They implemented methods to retrieve GitHub teams by ID and slug, improving the API's capabilities for organization management. Further contributions include code formatting and deprecation updates, reflecting a focus on code quality and API evolution.
apigithub-api-v3client-libraryjava-apijava
cloud-custodian/cloud-custodian
Oct 2019 - Dec 2020
Rules engine for cloud security, cost optimization, and governance, DSL in yaml for policies to query, filter, and take actions on resources
Role in this project:Cloud Engineer / Infrastructure Engineer
Cloud Engineer / Infrastructure EngineerContributions:4 reviews, 17 commits, 22 PRs in 1 year 2 months
Contributions summary:Karol's contributions primarily revolve around enhancing the cloud-custodian project, specifically focusing on Google Cloud Platform (GCP) integrations and functionality. Their work includes adding actions for deleting log sinks and load balancer addresses, creating machine images from instances, and expanding the deletion options for PubSub resources. Additionally, they addressed issues related to metrics output configuration and made code improvements to support tagging and labeling features within the GCP environment.
gcpquery-filterserverlesscompliancecloud-security
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