Markus Killendahl
Software Engineer at lun-energy
Denmark
Summary
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RockstarMarkus Killendahl is a software engineer based in Denmark with seven years of hands-on experience building full-stack web applications. He currently contributes at Lun Energy and is an active open-source contributor to Electricity Maps, where he implemented a nuclear production data parser and improved both backend integration tests and frontend onboarding flows. Comfortable across backend and frontend stacks, he blends API work, data parsing, and UI/UX enhancements to deliver end-to-end features. His contributions to a real-time CO2 emissions visualization project show a practical focus on data-driven, sustainability-oriented tooling. Markus pairs coding craftsmanship—like attention to formatting and test coverage—with product-minded improvements that make complex energy data accessible to users.
7 years of coding experience
Github Skills (12)
javascript10
python10
react9
apidoc9
front-end-development9
api9
application8
back-end-development7
data-visualizations7
climate-change7
data-visualisation7
data-visualization7
Programming languages (6)
Github contributions (5)
electricitymaps/electricitymaps-contrib
Aug 2020 - Dec 2022
The open source repository for Electricity Maps App and data parsers that enables a real-time visualisation of the CO2 emissions of electricity consumption
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:316 reviews, 195 commits, 186 PRs in 2 years 4 months
Contributions summary:Markus contributed to both the backend and frontend components of the Electricity Maps project. They implemented a parser to fetch nuclear production data for the JP-KN zone, demonstrating backend development skills. The user also updated frontend components, including API interactions, UI elements, and the onboarding modal, displaying proficiency in frontend technologies and UI/UX improvements. Additionally, the user addressed code formatting and integration tests.
real-timeelectricity-consumptionvisualisationco2-emissionsemissions
waltonzt/electricitymap-contrib
Aug 2022 - Aug 2022
A real-time visualisation of the CO2 emissions of electricity consumption
Contributions:4 pushes in 6 days
real-timeelectricity-consumptionvisualisationco2-emissionsemissions
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