Kevin Köster
Head Of Software Engineering at Zenfulfillment
Bergisch Gladbach, North Rhine-Westphalia, Germany
Summary
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RockstarKevin Köster is a Head of Software Engineering with a decade of experience leading teams and shipping web products across startups and media tech. Currently steering engineering at Zenfulfillment, he blends hands-on development with leadership, having previously led teams at RTL Interactive and Homelike. He contributes to open-source front-end tooling—improving build processes and UI components in the popular PaperCSS project—illustrating a practical focus on developer workflows and UX polish. Based in Bergisch Gladbach, Germany, Kevin is known for turning messy front-end build chains into reliable pipelines and for mentoring teams through fast product iterations.
9 years of coding experience
5 years of employment as a software developer
German, English
Github Skills (5)
html10
css10
sass10
gulp10
javascript4
Programming languages (5)
Github contributions (5)
papercss/papercss
Dec 2017 - Jul 2020
The Less Formal CSS Framework
Role in this project:
Front-end Developer
Front-end DeveloperContributions:3 reviews, 30 commits, 6 PRs in 2 years 7 months
Contributions summary:Kevin primarily focused on improving the build process and UI components within the CSS framework. They updated the build process with gulp tasks, including SASS compilation, CSS minification, and file watching. The user also fixed a bug related to duplicate collapsibles and modified the index.html file to include and modify tabs within the framework, contributing to the improvement of UI elements.
primercssformalstylescss-framework
zenfulfillment/billbee-node-api
Jan 2022 - Apr 2025
Billbee API client for nodejs
Contributions:7 reviews, 1 PR, 3 pushes in 3 years 3 months
api-clientapibillbee-apibillbeenodejs
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