
Hernán Perticarari developed and enhanced a range of user-facing features for the aemsites/cmegroup repository, focusing on navigation, card UI, and product discovery. He engineered dynamic navigation bars, responsive card components, and an AI-powered recommendation system, applying JavaScript, CSS, and React to improve usability and maintainability. His work included implementing persistent filtering with URL parameters, refining accessibility, and standardizing global styles to ensure consistency across devices. By addressing both feature development and bug fixes, Hernán demonstrated depth in front-end development, asynchronous programming, and API integration, delivering solutions that improved user experience, accessibility, and long-term codebase scalability.
January 2026 (2026-01): Delivered a configurable size parameter for the Recommendation AI service, enabling control over the number of recommendations returned. Implemented updates to both the card creation logic and the service endpoint to support the new parameter, increasing flexibility and relevance of recommendations. All work centered in the aemsites/cmegroup repository with a single feature-focused change set. No major bugs reported this month. Notable collaboration included co-authorship with Gustavo H Perticarari.
January 2026 (2026-01): Delivered a configurable size parameter for the Recommendation AI service, enabling control over the number of recommendations returned. Implemented updates to both the card creation logic and the service endpoint to support the new parameter, increasing flexibility and relevance of recommendations. All work centered in the aemsites/cmegroup repository with a single feature-focused change set. No major bugs reported this month. Notable collaboration included co-authorship with Gustavo H Perticarari.
December 2025 (Month 2025-12): CME Group site (aemsites/cmegroup) - UI stability enhancement. Key deliverable: a robust fix for navbar visibility when Alert blocks are present. Implemented with an enforce-position CSS rule to keep the navbar visible during scrolling, eliminating a regression that affected user navigation. The change is linked to CUEN-699 (#1002) and committed as d2adb2194620b8978992beb5529650af828f260a. Business impact: smoother navigation, reduced user confusion, and improved accessibility on pages with dynamic alerts. Technical achievements: front-end debugging, CSS specificity, maintainable patch with minimal risk, clear traceability and collaboration (co-authored fix).
December 2025 (Month 2025-12): CME Group site (aemsites/cmegroup) - UI stability enhancement. Key deliverable: a robust fix for navbar visibility when Alert blocks are present. Implemented with an enforce-position CSS rule to keep the navbar visible during scrolling, eliminating a regression that affected user navigation. The change is linked to CUEN-699 (#1002) and committed as d2adb2194620b8978992beb5529650af828f260a. Business impact: smoother navigation, reduced user confusion, and improved accessibility on pages with dynamic alerts. Technical achievements: front-end debugging, CSS specificity, maintainable patch with minimal risk, clear traceability and collaboration (co-authored fix).
November 2025 monthly summary for aemsites/cmegroup focused on delivering high-value features and accessibility improvements that enhance content discovery, personalization, and usability. Key work included the introduction of an AI-powered Card Recommendations and Dynamic Card Rendering component, along with improvements to Product Slate Filters for accessibility and URL encoding. These initiatives combined improved business value through better user engagement and easier shareable search results, while advancing maintainability and technical craftsmanship across the codebase.
November 2025 monthly summary for aemsites/cmegroup focused on delivering high-value features and accessibility improvements that enhance content discovery, personalization, and usability. Key work included the introduction of an AI-powered Card Recommendations and Dynamic Card Rendering component, along with improvements to Product Slate Filters for accessibility and URL encoding. These initiatives combined improved business value through better user engagement and easier shareable search results, while advancing maintainability and technical craftsmanship across the codebase.
October 2025 (aemsites/cmegroup): Delivered a comprehensive Product Slate Filtering System with dropdowns, search, and persistence. The feature adds asset class, exchange, and venue filters, a search option, a 'new products only' checkbox, UI styling improvements, and URL parameter-based persistence for shareable/restorable views. No major bugs were reported this month. This work enhances product discovery, reduces time to identify relevant products, and establishes a scalable filtering foundation for future enhancements. Technologies demonstrated include frontend filtering, search, state management, and URL parameter persistence.
October 2025 (aemsites/cmegroup): Delivered a comprehensive Product Slate Filtering System with dropdowns, search, and persistence. The feature adds asset class, exchange, and venue filters, a search option, a 'new products only' checkbox, UI styling improvements, and URL parameter-based persistence for shareable/restorable views. No major bugs were reported this month. This work enhances product discovery, reduces time to identify relevant products, and establishes a scalable filtering foundation for future enhancements. Technologies demonstrated include frontend filtering, search, state management, and URL parameter persistence.
2025-09 Monthly Summary for aemsites/cmegroup: Delivered two critical UI visibility fixes to ensure promo bars and navigation remain visible when alerts are present. ShareThis/addThis Bar Visibility Fix adjusted z-index and positioning with dynamic navbar height handling via a CSS variable; commits acfbb9dbe7bbcdfe479d92c1962561663cdc8936 and debb42697a18dd0e76bf82e8916ce4b0b42d617f. Course Navigation Bar Visibility Fix corrected overlap with alert banners on larger screens by updating top and margin-top; commits 8e99f693bf63c6988c177afdeede43e5fa406e77 and 0e6ec2a853be10bef1ca8890d17ba4694030cdc0. These changes improve visibility, accessibility, and cross-page consistency, delivering clearer branding/promo exposure and more reliable navigation. Technologies/skills demonstrated: CSS, responsive design, z-index management, CSS variables, DOM selectors, and Git-based collaboration. Business impact: smoother user experience, higher engagement potential with promo bars and course navigation, and reduced recurrence of overlap bugs.
2025-09 Monthly Summary for aemsites/cmegroup: Delivered two critical UI visibility fixes to ensure promo bars and navigation remain visible when alerts are present. ShareThis/addThis Bar Visibility Fix adjusted z-index and positioning with dynamic navbar height handling via a CSS variable; commits acfbb9dbe7bbcdfe479d92c1962561663cdc8936 and debb42697a18dd0e76bf82e8916ce4b0b42d617f. Course Navigation Bar Visibility Fix corrected overlap with alert banners on larger screens by updating top and margin-top; commits 8e99f693bf63c6988c177afdeede43e5fa406e77 and 0e6ec2a853be10bef1ca8890d17ba4694030cdc0. These changes improve visibility, accessibility, and cross-page consistency, delivering clearer branding/promo exposure and more reliable navigation. Technologies/skills demonstrated: CSS, responsive design, z-index management, CSS variables, DOM selectors, and Git-based collaboration. Business impact: smoother user experience, higher engagement potential with promo bars and course navigation, and reduced recurrence of overlap bugs.
Monthly summary for 2025-08 for aemsites/cmegroup. Overall, focused on UI consistency and polish to reduce visual drift and improve user experience across breakpoints.
Monthly summary for 2025-08 for aemsites/cmegroup. Overall, focused on UI consistency and polish to reduce visual drift and improve user experience across breakpoints.
July 2025 performance highlights for aemsites/cmegroup. Delivered two major frontend features focused on UX and maintainability, stabilized typography defaults across blocks, and established a modular CSS architecture for navigation. Implemented user-facing styling improvements that enhance content readability and navigation reliability, preparing the codebase for faster future feature delivery and easier maintenance.
July 2025 performance highlights for aemsites/cmegroup. Delivered two major frontend features focused on UX and maintainability, stabilized typography defaults across blocks, and established a modular CSS architecture for navigation. Implemented user-facing styling improvements that enhance content readability and navigation reliability, preparing the codebase for faster future feature delivery and easier maintenance.
June 2025 monthly summary for aemsites/cmegroup: Delivered major front-end UX/UI improvements focused on consistency, responsiveness, and accessibility across the site. The changes span several components, delivering a more business-friendly and maintainable UI with measurable improvements in user interaction and visual stability.
June 2025 monthly summary for aemsites/cmegroup: Delivered major front-end UX/UI improvements focused on consistency, responsiveness, and accessibility across the site. The changes span several components, delivering a more business-friendly and maintainable UI with measurable improvements in user interaction and visual stability.
May 2025 monthly summary for aemsites/cmegroup: Delivered a cohesive UI refresh and reliability improvements focusing on user experience, responsiveness, and onboarding stability. Key outputs include Card UI Enhancements across articles, courses, and links; Navigation and Footer stability fixes; an Authentication endpoint update; and Podcast IDs deduplication to prevent duplicates on pages. The work emphasizes business value through a more consistent UI, smoother navigation, and reliable signup flows.
May 2025 monthly summary for aemsites/cmegroup: Delivered a cohesive UI refresh and reliability improvements focusing on user experience, responsiveness, and onboarding stability. Key outputs include Card UI Enhancements across articles, courses, and links; Navigation and Footer stability fixes; an Authentication endpoint update; and Podcast IDs deduplication to prevent duplicates on pages. The work emphasizes business value through a more consistent UI, smoother navigation, and reliable signup flows.
April 2025 monthly work summary for aemsites/cmegroup: Delivered a major navigation feature — Website Navigation Bar Refactor and Sub-navigation Enhancement. Refactored CSS/JavaScript to improve max-width handling, background colors, font styles, and responsive behavior. Implemented dynamic sub-navigation generation and styling in JS so sub-navigation columns render correctly based on content across breakpoints. Linked to commit 49303a9cf0567b2d97dcaa695db312d9e7311707 (Issue 178 subnav (#180)). No major bugs fixed were reported in this period. Impact: improved usability and consistency across devices, better alignment with design system, and easier future maintenance. Technologies: CSS/JS refactor, responsive design, dynamic DOM manipulation, code traceability with commit history, issue-tracking integration.
April 2025 monthly work summary for aemsites/cmegroup: Delivered a major navigation feature — Website Navigation Bar Refactor and Sub-navigation Enhancement. Refactored CSS/JavaScript to improve max-width handling, background colors, font styles, and responsive behavior. Implemented dynamic sub-navigation generation and styling in JS so sub-navigation columns render correctly based on content across breakpoints. Linked to commit 49303a9cf0567b2d97dcaa695db312d9e7311707 (Issue 178 subnav (#180)). No major bugs fixed were reported in this period. Impact: improved usability and consistency across devices, better alignment with design system, and easier future maintenance. Technologies: CSS/JS refactor, responsive design, dynamic DOM manipulation, code traceability with commit history, issue-tracking integration.

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