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Aaron Grogg

@aarongrogg

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Senior web developer, committed to improving the user experience by improving web performance

United States

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What I'm looking for

I am looking for a position where I can help a team make a difference.

I advocate for data-driven, performance-first development practices using Real User Monitoring and Synthetic Monitoring to drive measurable results.

If you need a partner who understands the intricacies of optimizing platforms and can collaborate effectively across diverse engineering teams, let’s connect.

Senior Web Performance Engineer specializing in Core Web Vitals optimization, front-end performance engineering, and enterprise-scale observability. Led performance initiatives across distributed engineering organizations through automation, monitoring, auditing, technical strategy, and cross-functional collaboration. Deep expertise in Real User Monitoring (RUM), synthetic testing, rendering optimization, asset prioritization, caching strategies, and modern front-end architecture.

Led web performance optimization initiatives for 250+ enterprise e-commerce websites, spanning 20 brands across 150+ countries
Improved global Largest Contentful Paint (LCP) from 3.26s to 1.78s
Reduced global Cumulative Layout Shift (CLS) from 0.41 to below 0.10
Implemented enterprise-scale Real User Monitoring (RUM) and synthetic monitoring systems
Contributing Editor to the 2025 Web Almanac
Open-source contributor

Experience

Work history, roles, and key accomplishments

Senior Performance Architect

Estée Lauder Companies

Jan 2022 - Oct 2025 (3 years 9 months)

Reduced global LCP from 3.26s to 1.78s and improved Core Web Vitals by optimizing resource prioritization, critical asset delivery, and automating lazy loading workflows. Implemented enterprise-scale RUM and synthetic monitoring, and delivered quarterly performance audits and optimization roadmaps to support distributed international platforms.

Chief Technology Officer

AdvantiPro GmbH

Apr 2016 - Jan 2022 (5 years 9 months)

Directed technology strategy and led front-end architecture, infrastructure operations, and platform modernization for a digital agency serving multiple international clients. Designed and maintained 20+ WordPress platforms and built scalable integrations and performance improvements across multiple systems.

Senior Developer

Netbiscuits GmbH

Mar 2012 - Apr 2016 (4 years 1 month)

Led front-end development for analytics and customer management platforms, including building a customer analytics dashboard and customer account management systems. Implemented performance optimization and responsive/adaptive rendering strategies to improve usability across devices and networks.

Technical Lead

Time Inc. (People.com)

Jun 2007 - Mar 2012 (4 years 9 months)

Led front-end architecture and web performance optimization initiatives for a high-traffic media platform serving up to 40 million monthly users. Improved CSS and JavaScript performance, introduced shared component patterns, and applied progressive enhancement practices using Modernizr and HTML5 Boilerplate.

Web Developer

Bank of America (Prime Brokerage)

Jun 2005 - Jun 2007 (2 years)

Developed secure financial web applications and authenticated client platforms for hedge fund reporting and investor services operations. Automated reporting workflows, built investor reporting systems and client-facing portals, and modernized legacy front-end systems by migrating table-based layouts to standards-based CSS.

Secure Web Applications authenticated client platforms financial reporting automation data processing workflows Hedge Fund Reporting Investor Services dynamic investor reporting systems secure client facing portals CSS modernization standards based CSS Accessibility Maintainability Scalability

Web and Software Specialist

National Academies of Science(Transportation Research Board)

May 2002 - Jun 2006 (4 years 1 month)

Developed web applications and conference management platforms supporting large-scale academic and transportation research events. Built an ASP-based conference registration system that reduced operational costs by up to $600 per conference and supported conference platforms for 10,000+ attendees.