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YourivHDenHaag

PROFILE

Yourivhdenhaag

Youri van Heumen developed and maintained core frontend features for the nl-portal/nl-portal-frontend-libraries and nl-design-system/denhaag repositories, focusing on scalable UI components, accessibility, and robust state management. He implemented localization, authentication flows, and modular design patterns using React and TypeScript, while integrating GraphQL for efficient data handling. His work included modernizing navigation, refining form validation, and enhancing accessibility through ARIA attributes and WCAG-compliant styling. By centralizing configuration and improving build tooling, Youri ensured maintainable code and reliable releases. His approach balanced user experience with technical depth, delivering flexible, testable components and streamlined workflows that supported evolving business requirements.

Overall Statistics

Feature vs Bugs

60%Features

Repository Contributions

372Total
Bugs
64
Commits
372
Features
95
Lines of code
81,682
Activity Months14

Work History

November 2025

19 Commits • 4 Features

Nov 1, 2025

November 2025 performance summary for nl-portal and nl-design-system teams. Key features delivered include: (1) nl-portal-frontend-libraries — Form UI Template Modernization and Accessibility Enhancements: migrated to template-based form components, standardized templates, improved validation and accessibility, and tightened template management and security; added Product Data Mapping Enhancement: flexible data object mapping for products. (2) UI stability improvements in form components: fixed checkbox toggle on label click, corrected checkbox/radio rendering, and reverted FormIoUploader template changes to restore stability. (3) nl-design-system/denhaag — Typography upgrade with new font package integration and npm publish readiness via version bump and distribution update.

October 2025

4 Commits • 2 Features

Oct 1, 2025

Month 2025-10: Delivered core front-end improvements focusing on routing reliability, UI configurability, and efficient data editing. Implemented centralized routing constants, a themed product listing feature, and performance-conscious contact editing to reduce unnecessary API calls. Improvements support maintainability, user experience, and scalable theming for product catalogs.

September 2025

41 Commits • 12 Features

Sep 1, 2025

September 2025 highlights across nl-design-system/denhaag and nl-portal/nl-portal-frontend-libraries focused on UI modernization, stability, privacy, and maintainability, delivering tangible business value while reducing risk.

August 2025

19 Commits • 4 Features

Aug 1, 2025

August 2025 performance summary: Across two repositories, delivered key features, fixed critical issues, and strengthened security and maintenance practices to support business goals. Key features delivered include: Den Haag fonts package with TheSans and TheMix, Rollup asset configuration, and Storybook rendering integration; new account page contact section displaying email and phone with edit capability; improved alert rendering and link usage; title mapping fix for UI consistency; security hardening with CSP enforcement for Formio and updated evaluator/interpolation, followed by CSP rollback to preserve compatibility; frontend maintenance and dependency upgrades, including removal of unused Font Awesome and alignment of peer dependencies. Major bugs fixed include: template processing stabilized by migrating lodash to lodash-es and upgrading Open Formulieren SDK/renderer; Formio CSP-related issues resolved with evaluator updates and subsequent compatibility tweaks; UI alignment fixes and small defect corrections (alert/link rendering, pageindex/field title mapping). Overall impact: improved build stability, stronger security posture, better UX for account management, and reduced maintenance toil through dependency hygiene and code cleanup. Technologies demonstrated: Rollup asset handling, lodash-es migration, Formio integration and CSP work, evaluator/interpolation updates, dependency management, Storybook integration, and front-end performance enhancements.

July 2025

65 Commits • 14 Features

Jul 1, 2025

July 2025 monthly summary focusing on key business value and technical achievements across nl-portal/frontend-libraries and nl-design-system/denhaag. Delivered user-centric features, bundle and performance optimizations, UI branding updates, and a broad set of stability and quality improvements. Highlights include VNG-aligned Account Page navigation, Den Haag component bundle optimizations and candidate components, bundle-size reductions via externalized dependencies and lodash-es tree-shaking, Open Klant 2 contact moments support with a fallback banner when emailaddress is missing, and branding/UI refresh replacing the Den Haag logo with the NL-Portal logo. Maintenance and tooling upgrades (dependencies, Vite, Storybook) improved release cadence and future maintenance. A comprehensive set of bug fixes improved stability, reliability, and privacy handling: disabled notification settings until Openklant support, removal of console logs, default person when no authentication methods, first-search closed cases fix, URL/routing fixes, linting and unit-test resilience, and removal of unused code. The combined effort enhances performance, accessibility, and data privacy while reducing risk in future releases.

June 2025

38 Commits • 9 Features

Jun 1, 2025

Month: 2025-06. This period delivered significant frontend UI improvements, accessibility enhancements, and design-system refinements across multiple repositories, along with automation for team membership in Terraform. Key business-value outcomes include a more usable UI, accessible and stable components, and streamlined operations for team management. Key features delivered: - UI redesign and default footer integration in nl-portal/nl-portal-frontend-libraries, plus basic product content pages (product detail page and dataobject details). - Commits: b69375746c9d1ffe799a75442f5cbfe7b53c8aeb; fe9e3ecdded22b10ace70948086260cab9e11e90; 7d1e64c942836c5fe8b1e5998d61449db5a6059d; 4677a6a3ef686a4f77f6a893d8ed78a38d7fe6c8. Major bugs fixed: - Accessibility and UI interaction fixes across the frontend, addressing color contrast, loading state handling, accessibility attributes, and search form submission reliability. - Commits: 400c0812ffcbffff935adc9a9fbf6ec2e34777ab; d48d40955fc64f21d09e51d95c6cad58531d0f45; afdbe339fe010e970bf472ceaf25451cedc8cf04; 33e73d5cc0c724445dcda6573b7e7aca8718d795; a01a822d196795392b5e081a79461c4f8db3b316. Overall impact and accomplishments: - Improved user experience with a redesigned UI, consistent styling, and improved accessibility, enabling broader usability and faster feature delivery. - Refined code health and maintainability through cleanup, forwardRef replacement to fix export errors, and removal of unused components. - Strengthened design-system capabilities with PageIndex, header logo customization, and smart LinkList improvements for better navigation and icon rendering. - Implemented Terraform automation to manage team membership, enabling streamlined onboarding and access control. Technologies/skills demonstrated: - React/TypeScript, UI/UX design alignment with design-system components, and accessibility best practices (WCAG conformance). - Frontend testing stability improvements and export reliability. - Terraform for infrastructure-as-code-based team management. - Git-based collaboration and commit discipline (multiple focused commits per feature/bug).

May 2025

17 Commits • 8 Features

May 1, 2025

May 2025 performance summary for nl-design-system/denhaag and nl-portal/nl-portal-frontend-libraries. Delivered key API enhancements, UX improvements, and backend upgrades that strengthen component reliability, accessibility, and developer experience. Notable outcomes include ref-forwarding support for Select, a flat mobile menu option, a redesigned account page with new editing routes, a v2 backend API upgrade (haalcentrala) with BRP data types, and ongoing maintenance via dependency bumps and changelog updates.

April 2025

17 Commits • 4 Features

Apr 1, 2025

April 2025 performance summary for nl-portal and denhaag teams. Focus this month centered on stabilizing developer tooling, improving user experience in core UI patterns, and expanding the component library with accessible, scalable patterns. Delivered reliable commit tooling, UI state management improvements, and search/pagination enhancements that directly impact productivity and product usability.

March 2025

25 Commits • 7 Features

Mar 1, 2025

March 2025 performance summary: Delivered core UI components and accessibility improvements across the design-system and portal libraries, enabling accessible, responsive, and release-ready interfaces with tangible business value.

February 2025

53 Commits • 10 Features

Feb 1, 2025

February 2025: Stabilized authentication, pagination, and data boundaries while modernizing core tech. Delivered an OIDC-based auth flow, improved pagination UX and performance, fixed data boundary handling, and upgraded React tooling. These changes reduce risk, improve user experience, and lay the groundwork for faster feature delivery.

January 2025

19 Commits • 6 Features

Jan 1, 2025

January 2025 monthly update: Delivered a set of UI/UX improvements, accessibility fixes, and modernization in both the design-system and portal libraries, with a strong emphasis on performance, developer experience, and business value. The work enhances user experience, accessibility compliance, and cross-version React compatibility, while laying groundwork for future scalability and authentication modernization.

December 2024

17 Commits • 2 Features

Dec 1, 2024

December 2024 performance highlights: Delivered two frontend improvements in nl-portal-frontend-libraries that drive user experience, reliability, and maintainability. Key outcomes include: - Notification System Improvements and Bug Fixes: consolidated notification state management, routing-driven displays, removed legacy hooks and test infra; timing fixes with useLayoutEffect; migration to NotificationProps; removal of unused alert props; reduced flicker and disappearing notifications. - Case Details UI Enhancements and Robustness: improved rendering of case details with extra details and nested structures; strengthened type safety and data validation to prevent erroneous pages; cleaned up codepaths and removed dummy data to streamline rendering. Overall this reduces support overhead, improves platform reliability, and accelerates future feature work. Technologies/skills demonstrated: React state management, hooks lifecycle optimization, TypeScript typings, UI data handling, testing hygiene.

November 2024

28 Commits • 9 Features

Nov 1, 2024

November 2024 performance snapshot focusing on localization-driven UI improvements, robust date handling, and UX enhancements across frontend libraries and the Den Haag design system. The month delivered a scalable localization foundation, improved date/time reliability, a reusable notification system, and interactive UI elements that drive user engagement and maintainability.

October 2024

10 Commits • 4 Features

Oct 1, 2024

October 2024 performance summary: Delivered core localization capabilities across the design system and frontend libraries, standardized date formatting with a shared utility, and tightened UI consistency across components. Fixed critical layout and localization bugs, elevated test reliability, and positioned the codebase for scalable multi-locale support and faster future iterations.

Activity

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Quality Metrics

Correctness88.6%
Maintainability90.2%
Architecture85.6%
Performance84.8%
AI Usage21.0%

Skills & Technologies

Programming Languages

CSSGraphQLHCLHTMLJSONJavaScriptMJSMarkdownReactSCSS

Technical Skills

API IntegrationAccessibilityAccessibility (a11y)Apollo ClientAsset ManagementAuthenticationBabelBuild ConfigurationBuild ProcessBuild ToolsCI/CDCSSCSS AnimationsCSS GridCSS Management

Repositories Contributed To

3 repos

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

nl-portal/nl-portal-frontend-libraries

Oct 2024 Nov 2025
14 Months active

Languages Used

JavaScriptTypeScriptHTMLReactSCSSYAMLtsxGraphQL

Technical Skills

Front-end DevelopmentFrontend DevelopmentInternationalization (i18n)LocalizationReactTesting

nl-design-system/denhaag

Oct 2024 Nov 2025
12 Months active

Languages Used

JavaScriptReactSCSSTypeScriptCSSSVGHTMLMarkdown

Technical Skills

CSSComponent DevelopmentFront-end DevelopmentInternationalizationInternationalization (i18n)React

nl-design-system/terraform

Jun 2025 Jun 2025
1 Month active

Languages Used

HCL

Technical Skills

DevOpsTerraform