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Holger Koser

PROFILE

Holger Koser

Holger Koser contributed to the gardener/dashboard and evcc-io/evcc repositories by delivering features and stability improvements across backend and frontend systems. He enhanced editor UX and code quality through CodeMirror 6 migration, ESLint upgrades, and dynamic imports, using JavaScript and TypeScript to streamline developer workflows. Holger refactored resource management APIs for better reactivity and maintainability, splitting IO logic and strengthening test coverage. He also improved build reliability with Docker and Yarn tooling updates, and addressed operational issues by refactoring configuration watchers. In evcc-io/evcc, he resolved a database backup bug in Go, ensuring reliable file downloads and traceable maintenance.

Overall Statistics

Feature vs Bugs

86%Features

Repository Contributions

10Total
Bugs
1
Commits
10
Features
6
Lines of code
21,790
Activity Months4

Work History

February 2026

1 Commits

Feb 1, 2026

February 2026 monthly summary for evcc-io/evcc: A reliability-focused month centered on a targeted bug fix for database backup downloads. The fix ensures the Content-Length header is correctly set in the backup response, improving download reliability and reducing user-facing errors. The change is tracked end-to-end with a precise commit and issue link, enabling clear audits and easier future maintenance. Overall, the month maintained feature velocity while strengthening core backup operations and data integrity.

February 2025

1 Commits • 1 Features

Feb 1, 2025

February 2025 monthly summary for gardener/dashboard. Focused on stabilizing Resource Management and delivering end-to-end reactivity for project resources, with a targeted API/IO refactor and accompanying test updates to improve reliability and maintainability across backend and frontend. Key work culminated in an end-to-end resource reactivity overhaul, improved IO architecture, and a stronger test suite, delivering business value through reduced incident risk and faster feature delivery.

December 2024

4 Commits • 3 Features

Dec 1, 2024

December 2024: Delivered substantive frontend and infrastructure improvements for gardener/dashboard. Editor UX and performance were enhanced through CodeMirror dynamic imports, reorganized composables, a new useCodemirror hook, and improved line highlighting. Build stability and deployment reliability were strengthened via Yarn 4 compatibility updates and a duplicate dependency check in Docker builds. The polling watcher was refactored into its own package to improve reusability and maintainability across the repo. These changes reduce runtime risk, speed up releases, and improve developer onboarding.

November 2024

4 Commits • 2 Features

Nov 1, 2024

November 2024: Editor UX upgrade and code-quality/compliance enhancements across gardener/dashboard. Delivered CodeMirror 6 migration improvements (refactoring integration, whitespace handling, correct indent unit detection, and a new whitespace view plugin for visibility). Strengthened code quality and compliance posture via ESLint v9 with neostandard, Dockerignore/build fixes, direct lodash imports, license/compliance updates, and a polling watcher for configuration updates (replacing chokidar). These changes improve developer productivity, reduce build and runtime risks, and tighten governance across the repository.

Activity

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Quality Metrics

Correctness89.0%
Maintainability87.0%
Architecture87.0%
Performance78.0%
AI Usage20.0%

Skills & Technologies

Programming Languages

CSSDockerfileGoHTMLJavaScriptShellTypeScriptVueYAML

Technical Skills

API DevelopmentAPI developmentBackend DevelopmentBuild ToolsCI/CDCode RefactoringCodeMirrorConfiguration ManagementDependency ManagementDevOpsDockerDynamic ImportsESLintEvent HandlingFile System Operations

Repositories Contributed To

2 repos

Overview of all repositories you've contributed to across your timeline

gardener/dashboard

Nov 2024 Feb 2025
3 Months active

Languages Used

CSSHTMLJavaScriptShellTypeScriptVueDockerfileYAML

Technical Skills

CI/CDCodeMirrorConfiguration ManagementDependency ManagementDockerESLint

evcc-io/evcc

Feb 2026 Feb 2026
1 Month active

Languages Used

Go

Technical Skills

API developmentGobackend development