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Yolijn van der Kolk

PROFILE

Yolijn Van Der Kolk

Yolijn contributed to the nl-design-system/documentatie and nl-design-system/gebruikersonderzoeken repositories, focusing on documentation quality, accessibility, and user experience. They delivered features such as accessible component documentation, navigation improvements, and video player modernization using React, CSS, and TypeScript. Yolijn addressed legal compliance by clarifying open-source licensing and content governance, and enhanced research transparency by publishing usability studies and UX research artifacts. Their technical approach emphasized maintainable code, standards-based accessibility, and cross-framework examples, resulting in improved onboarding, policy alignment, and developer productivity. The work demonstrated depth in front-end development, content management, and information architecture, supporting both end users and internal teams.

Overall Statistics

Feature vs Bugs

83%Features

Repository Contributions

39Total
Bugs
4
Commits
39
Features
20
Lines of code
12,648
Activity Months11

Work History

March 2026

1 Commits • 1 Features

Mar 1, 2026

March 2026: Usability research delivered for Municipal Website Templates within nl-design-system/gebruikersonderzoeken. Produced a comparative study focusing on navigation structure and user task performance to inform future design decisions. Published the toptask research artifact and integrated findings into design-system documentation. No major bugs reported in this repo this month.

February 2026

2 Commits • 2 Features

Feb 1, 2026

February 2026 (nl-design-system/documentatie): Delivered two user-facing features and fixed a UI bug, enhancing UI cleanliness and keeping event content current. Key outcomes include a CSS-based UI cleanup that hides the unlisted theme banner, and a heartbeat entry for the February 17, 2026 event with speakers and topics, plus a video section update.

January 2026

3 Commits • 2 Features

Jan 1, 2026

January 2026 (2026-01) monthly contribution for nl-design-system/gebruikersonderzoeken focusing on licensing clarity, content governance, and URL correctness; highlights include Colophon licensing updates, improved license exclusions narration, and a corrected external URL redirect.

October 2025

6 Commits • 4 Features

Oct 1, 2025

October 2025 — NL Design System / Documentatie: Delivered key product and platform improvements with business impact. Implemented NL Design System MA theme integration into the Docusaurus docs site, aligning navigation, headings, and styling with the new design language. Improved global styling and responsiveness across breakpoints, refined DocSearch visuals, revamped CSS variables, and ensured robust navbar/footer rendering on all devices. Updated Design Systems Week documentation with detailed session descriptions and conditional rendering notes for cancellations. Upgraded component-progress library to a newer alpha to unlock new community components and stability fixes. These changes reduce onboarding time, improve developer productivity, and enhance user experience across docs and design system components.

August 2025

1 Commits • 1 Features

Aug 1, 2025

August 2025: Video Player modernization implemented across nl-design-system/documentatie with accessibility enhancements and cross-page embedding standardization, accompanied by a cookies-reduction fix to improve privacy compliance. The changes deliver a more maintainable, accessible, and privacy-conscious video experience across documentation pages.

July 2025

2 Commits • 2 Features

Jul 1, 2025

July 2025 monthly summary for the nl-design-system/documentatie repo focused on governance, content quality, and team representation. Delivered two documentation changes with clear business value and minimal disruption to end users.

March 2025

3 Commits • 1 Features

Mar 1, 2025

March 2025 performance for nl-design-system/documentatie focused on user-facing clarity and internal visibility improvements. Key features delivered: Event communications clarity improvements across docs and privacy policy to ensure users are informed about relevant events and post-event communications. Major bugs fixed: Corrected mismatch in design-system progress to accurately reflect four components marked as 'Help Wanted' on the website, improving public visibility. Overall impact: Increased user transparency, policy compliance, and visibility of open opportunities; improved maintainability of documentation. Technologies/skills demonstrated: documentation updates, content strategy, build-process awareness, version-controlled documentation, privacy policy alignment.

February 2025

1 Commits

Feb 1, 2025

February 2025: Focused on documentation quality and navigation reliability for the nl-design-system/documentatie repository. Delivered a precise fix to a broken link in the Design Open Dag docs, improving access to the Design Open Hour resource and reducing user friction.

January 2025

3 Commits • 1 Features

Jan 1, 2025

January 2025: Accessibility enhancement and UX research documentation improvements across two design-system repos. Primary deliverables include an ARIA attribute cleanup in the Documentatie repository to align ARIA attributes with the actual isHidden-driven behavior, and the creation and refinement of exploratory UX research documentation for Mijn Producten / Mijn Omgeving, establishing objectives, methodology, and participant details (initially 5 residents, 5 experts, and entrepreneurs). These changes improve accessibility, clarity, and decision quality, supporting broader adoption and faster stakeholder alignment.

December 2024

5 Commits • 1 Features

Dec 1, 2024

December 2024: Documentation updates for nl-design-system/documentatie delivering comprehensive component usage guidance, cross-framework examples, and corrected references to improve developer onboarding and cross-team consistency. The work focused on Code Block, Code, Color Sample, Data Badge, Paragraph, Heading, Number Badge, and mark with installation instructions and usage examples in CSS, React, and Figma; plus accessibility considerations and community listings.

November 2024

12 Commits • 5 Features

Nov 1, 2024

Month: 2024-11 — Focused on delivering user-facing documentation features, robust build/deploy reliability, and MDX content rendering enhancements for NL Design System documentation. The work improves accessibility guidance, navigation, and overall developer experience while strengthening release stability.

Activity

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Quality Metrics

Correctness97.8%
Maintainability97.8%
Architecture97.0%
Performance97.0%
AI Usage20.0%

Skills & Technologies

Programming Languages

Apache ConfigurationCSSHTMLJSONJSXJavaScriptMDXMarkdownReactTypeScript

Technical Skills

AccessibilityAccessibility StandardsBuild AutomationBuild ConfigurationBuild ManagementCI/CDCSSCode CleanupCode FormattingComponent LibraryComponent Library DevelopmentComponent Library IntegrationConfigurationContent OrganizationDependency Management

Repositories Contributed To

2 repos

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

nl-design-system/documentatie

Nov 2024 Feb 2026
9 Months active

Languages Used

Apache ConfigurationCSSJavaScriptMarkdownReactTypeScriptYAMLhtaccess

Technical Skills

AccessibilityAccessibility StandardsBuild AutomationBuild ConfigurationBuild ManagementCI/CD

nl-design-system/gebruikersonderzoeken

Jan 2025 Mar 2026
3 Months active

Languages Used

MarkdownTypeScript

Technical Skills

DocumentationUX ResearchReactcontent managementdocumentationfront end development