Krzysztof Waliczek
Software Engineer At CERT Polska at NASK
Lower Silesian Voivodeship, Poland
Summary
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Rockstar🎓
Top SchoolKrzysztof Waliczek is an experienced Python software engineer with eight years building web applications and improving backend systems, currently working at CERT Polska. He has strong e-commerce and DevOps chops from his time at Saleor Commerce, where he contributed core GraphQL filtering features to the popular Saleor platform and automated end-to-end database setup for reliable testing. Prior roles at Nokia sharpened his full-stack skills across Python, Java and PHP, plus practical experience with databases, Git workflows and CI/CD. He combines hands‑on coding with design reviews and technical hiring responsibilities, reflecting both individual contributor and team-support strengths. Based in Lower Silesia, Poland, he brings a security-minded perspective to web development—an angle reinforced by his current CERT work. Notably, his contributions moved reusable filtering logic into Saleor’s core, improving API consistency across products and categories.
8 years of coding experience
6 years of employment as a software developer
Inżynier (Inż.) Informatyka, Inżynier (Inż.) Informatyka at Wrocław University of Science and Technology
Stackoverflow
384reputation
19kreached
14answers
1question
Github Skills (26)
docker10
postgresql10
python10
apidoc10
django10
bash10
wpgraphql10
dockers10
automation10
api10
filter10
wordpress-graphql10
graphql10
filtering10
automations10
Programming languages (4)
Github contributions (5)
saleor/saleor-platform
Feb 2023 - Oct 2024
All Saleor services started from a single repository with docker-compose.
Role in this project:
DevOps Engineer
DevOps EngineerContributions:4 reviews, 5 PRs, 6 pushes in 1 year 8 months
Contributions summary:Krzysztof focused on automating and streamlining the setup and operation of the Saleor e2e database within the `saleor-platform` repository. Their work included modifying a shell script to manage database creation, extensions, and data loading. They also updated the script to utilize `sed` for string replacement and integrated database migration execution within the automated process. This aimed at improving the reliability and efficiency of end-to-end testing.
saleor-dockersaleordockercomposedocker-compose
saleor/saleor
Sep 2022 - Jan 2023
Saleor Core: the high performance, composable, headless commerce API.
Role in this project:Back-end Developer
Back-end DeveloperContributions:33 releases, 917 reviews, 32 commits in 4 months
Contributions summary:Krzysztof primarily focused on adding and refining filtering capabilities for various entities within the Saleor e-commerce platform, enhancing the GraphQL API's data retrieval functionality. They implemented slug-based filtering across multiple endpoints like products, collections, and categories, moving this logic to the core for reuse. Additionally, the user integrated new filters, such as those for product availability and order checkout tokens, expanding data selection options. Their work included updates to the GraphQL schema and the implementation of filtering logic within the Python codebase.
pythonecommercedjangoheadless-ecommerceshopping-cart
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