
Andrew Lehman developed and refined frontend frameworks for the NCI-GDC and Gen3 projects, focusing on reusable component libraries, UI/UX improvements, and robust build systems. In the gdc-frontend-framework repository, he established a unified UI foundation using React, TypeScript, and Tailwind CSS, modularizing headers, footers, and navigation to accelerate feature delivery and ensure design consistency. He addressed accessibility, security, and dependency management, implementing solutions for cookie handling and content security policy. On uc-cdis/gen3-frontend-framework, Andrew delivered new cohort filtering features and overhauled analysis card components, integrating Next.js and Storybook to streamline developer experience and maintain visual alignment across applications.

October 2025 monthly summary for uc-cdis/gen3-frontend-framework focusing on feature delivery for cohort filtering via UploadFacet. Delivered feature enables users to upload value lists for cohort filtering, displays selected values as badges, and integrates with existing filtering and cohort builder logic. This work reduces manual entry and scales filtering for large datasets. No major bugs documented this period.
October 2025 monthly summary for uc-cdis/gen3-frontend-framework focusing on feature delivery for cohort filtering via UploadFacet. Delivered feature enables users to upload value lists for cohort filtering, displays selected values as badges, and integrates with existing filtering and cohort builder logic. This work reduces manual entry and scales filtering for large datasets. No major bugs documented this period.
September 2025 monthly summary for uc-cdis/gen3-frontend-framework. Delivered a major UI overhaul for Analysis Card components with Next.js appDir support in Storybook, aligning visuals with GDC styling and improving developer experience. Fixed a tooltip positioning issue in FacetControlsHeader and added a default createFacetCard Storybook story to enhance UI consistency and testability. These changes reduce onboarding friction and accelerate frontend iterations while maintaining visual fidelity and QA confidence across the framework.
September 2025 monthly summary for uc-cdis/gen3-frontend-framework. Delivered a major UI overhaul for Analysis Card components with Next.js appDir support in Storybook, aligning visuals with GDC styling and improving developer experience. Fixed a tooltip positioning issue in FacetControlsHeader and added a default createFacetCard Storybook story to enhance UI consistency and testability. These changes reduce onboarding friction and accelerate frontend iterations while maintaining visual fidelity and QA confidence across the framework.
July 2025 summary for NCI-GDC/gdc-docs: Key features delivered include Data Dictionary Viewer improvements removing deprecated properties for array-type fields and filtering enum values to improve accuracy; major bugs fixed include UI rendering issues for the D3-based Data Dictionary and Breadcrumbs with styling and D3 compatibility corrections. The changes enhance data visibility and trust, delivering business value by presenting relevant data representations and reducing user confusion. Skills demonstrated include front-end refactoring, D3 visualization, CSS styling, and maintaining compatibility with library updates.
July 2025 summary for NCI-GDC/gdc-docs: Key features delivered include Data Dictionary Viewer improvements removing deprecated properties for array-type fields and filtering enum values to improve accuracy; major bugs fixed include UI rendering issues for the D3-based Data Dictionary and Breadcrumbs with styling and D3 compatibility corrections. The changes enhance data visibility and trust, delivering business value by presenting relevant data representations and reducing user confusion. Skills demonstrated include front-end refactoring, D3 visualization, CSS styling, and maintaining compatibility with library updates.
May 2025 monthly summary for NCI-GDC/gdc-docs focused on stabilizing data presentation and export workflows. Key fixes improved data consistency in the dictionary viewer and re-enabled TSV/JSON exports, delivering tangible business value and improving maintainability.
May 2025 monthly summary for NCI-GDC/gdc-docs focused on stabilizing data presentation and export workflows. Key fixes improved data consistency in the dictionary viewer and re-enabled TSV/JSON exports, delivering tangible business value and improving maintainability.
February 2025 monthly summary for NCI-GDC/gdc-docs. Delivered the GDC Apps Navigation Menu to improve documentation navigation. Implemented a header dropdown with new SVG icons for GDC apps, and updated pre-commit hooks and secrets baseline to reflect the new detectors. No major bugs fixed this month. Overall impact includes improved user experience and alignment with tooling standards.
February 2025 monthly summary for NCI-GDC/gdc-docs. Delivered the GDC Apps Navigation Menu to improve documentation navigation. Implemented a header dropdown with new SVG icons for GDC apps, and updated pre-commit hooks and secrets baseline to reflect the new detectors. No major bugs fixed this month. Overall impact includes improved user experience and alignment with tooling standards.
December 2024 focused on delivering user-centric UI improvements, strengthening security, and stabilizing the build and dependencies across core repositories. In the gdc-frontend-framework, we introduced UI/UX refinements including dedicated download buttons and swapped JSON/TSV menu items to improve accessibility and ordering, along with responsive icon visibility and linting groundwork to ensure UI consistency on small screens. We also performed comprehensive dependency updates, TypeScript typings fixes, and lockfile regeneration, aligning peer dependencies to reduce build errors and improve maintainability. Security hardening included CSP/tacking adjustments for Datadog and tracking pixels, plus robust cross-domain cookie handling by removing the domain from the context ID cookie and purging cookies tied to the previous domain. In gdc-docs, external links were hardened with rel="noreferrer" to mitigate reverse tabnabbing across the documentation. Overall, these efforts improved accessibility and user experience, reduced security risk, and stabilized the development and release process.
December 2024 focused on delivering user-centric UI improvements, strengthening security, and stabilizing the build and dependencies across core repositories. In the gdc-frontend-framework, we introduced UI/UX refinements including dedicated download buttons and swapped JSON/TSV menu items to improve accessibility and ordering, along with responsive icon visibility and linting groundwork to ensure UI consistency on small screens. We also performed comprehensive dependency updates, TypeScript typings fixes, and lockfile regeneration, aligning peer dependencies to reduce build errors and improve maintainability. Security hardening included CSP/tacking adjustments for Datadog and tracking pixels, plus robust cross-domain cookie handling by removing the domain from the context ID cookie and purging cookies tied to the previous domain. In gdc-docs, external links were hardened with rel="noreferrer" to mitigate reverse tabnabbing across the documentation. Overall, these efforts improved accessibility and user experience, reduced security risk, and stabilized the development and release process.
2024-11 Monthly Summary – NCI-GDC/gdc-frontend-framework. This month focused on delivering a cohesive UI architecture, expanding the frontend’s capabilities, and modernizing the build process, while ensuring stability through targeted bug fixes. The work aligns with business goals of consistent user experience, faster feature delivery, and a maintainable codebase that scales with new analysis and portal features.
2024-11 Monthly Summary – NCI-GDC/gdc-frontend-framework. This month focused on delivering a cohesive UI architecture, expanding the frontend’s capabilities, and modernizing the build process, while ensuring stability through targeted bug fixes. The work aligns with business goals of consistent user experience, faster feature delivery, and a maintainable codebase that scales with new analysis and portal features.
October 2024 monthly summary for NCI-GDC/gdc-frontend-framework focused on establishing a unified UI foundation and reusable components to enable faster, consistent UI delivery and reduce future maintenance.
October 2024 monthly summary for NCI-GDC/gdc-frontend-framework focused on establishing a unified UI foundation and reusable components to enable faster, consistent UI delivery and reduce future maintenance.
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