Available to hire
I’m Aaron T. Grogg, a Web Developer and Performance Optimization Specialist with 25+ years crafting fast, user-focused digital experiences. I excel at front-end performance, Core Web Vitals, and collaborating with remote teams to deliver scalable, maintainable solutions that delight users and meet business goals.
In my recent role at Estée Lauder Companies, I led performance initiatives across 250+ e-commerce sites, implemented automated monitoring, and partnered with international engineering teams to improve load times and user experience. I’m passionate about mentoring teams, documenting best practices, and continuously researching innovations that push performance and UX forward.
Skills
Language
English
Fluent
German
Advanced
Spanish; Castilian
Beginner
Work Experience
Senior Performance Architect / UX Advocate at Estée Lauder Companies
October 1, 2025 - September 23, 2025Setup and monitor synthetic and RUM applications and reports to ensure sites are within performance budgets and KPIs, including Core Web Vitals. Investigate anomalies using RUM and Synthetic monitoring tools, DevTools, WebPageTest; perform quarterly audits; document enhancements and present findings to stakeholders. Lead efforts to reduce LCP by automating media lazy loading and 'preload' hints for LCP candidates, coordinating with international engineering teams; reduced global average from 3.26s to 1.78s, and key markets from 2.94s to 1.81s. Assisted with efforts to convert sites to responsive images and other performance optimizations.
Chief Technology Officer, Co-Owner at AdvantiPro GmbH
April 1, 2016 - September 23, 2025Oversee all aspects of company technology, including internal server and cloud services, customer products, and security. Make technology decisions, vet third-party vendors, automate workflows, and develop mobile-first, responsive websites and apps. Evaluate new technologies, support IE9 compatibility, and communicate solutions to teams and customers.
Senior Developer at Netbiscuits GmbH
March 1, 2012 - September 23, 2025Lead front-end developer for Analytics Dashboard and for the customer Account Management system; led front-end development for cross-brand analytics and performance-focused features, with an emphasis on cross-device performance, CSS/JS optimization, and adaptive design.
Freelance at Self-employed / Kaiserslautern, Rhineland-Palatinate, Germany
March 1, 2012 - September 23, 2025Hand-coded HTML, CSS and JavaScript (including jQuery and WordPress) for client projects; scoped requirements, estimated timelines and costs, drafted proposals, contracts and invoices; delivered performance-conscious, cross-device solutions.
Tech Lead at Time Inc., People.com
November 1, 2011 - September 23, 2025Spearheaded site-wide optimization projects, including CSS cleansing, reducing HTTP requests, refactoring JavaScript for speed, and implementing progressive enhancement. Delivered tablet-optimized, responsive interfaces and interactive features; coached teams on cross-brand performance improvements and efficient asset handling.
Web & Software Specialist at National Academies of Science, Transportation Research Board
June 1, 2006 - September 23, 2025Developed conference websites, streamlined registration processes, and created data workflows for reporting. Migrated forms to template-based HTML, improving stand-up time and cross-site consistency; built scalable online registration solutions.
Web & Software Specialist at National Academies of Science (Transportation Research Board)
May 1, 2002 - June 30, 2006Completely restructured the conference registration process, reducing per-conference setup by an average of 6-8 hours and costs by $200-600, improved reporting efficiency.
Develop conference websites, including interactive site for 10,000+ attendee Annual Meeting, improving attendee data availability, staff efficiency and reporting accuracy & turn-around time
Convert third-party form-driven registration process into customizable template-based HTML sites and registration process, reducing site stand-up time by nearly 20% and ensuring cross-site consistency
Create stand-alone ASP/database-driven online registration process for no-fee conferences, reducing per-conference costs by $500, reducing data-conversion time by 50% and ensuring data accuracy
Overhaul and streamlined Annual Meeting VIP invitation and registration process, reducing man-hours by 25%, ensuring data integrity, and reducing VIP frustration by eliminating duplicate contacts
Integrate web-based database with MS Office for reporting and distribution of data collected for above-referenced websites
Skills used: ASP, MS SQL Server, HTML, CSS, JS
Chief Technology Officer, Co-Owner at AdvantiPro GmbH
January 1, 2022 - September 23, 2025Oversee all technology decisions, including internal infrastructure, cloud services, and customer products. Managed third-party vendors, built in-house solutions, and automated workflows (event-driven and cron-based) to improve operations. Led development of mobile-first, responsive customer websites and apps (WordPress), conducted performance assessments, and proposed improvements to sales flow; ensured security and GDPR compliance.
Senior Developer at Netbiscuits GmbH
April 1, 2016 - September 23, 2025Lead front-end developer for Analytics Dashboard and Account Management system; drove cross-device performance optimization, including file optimization, minification, and responsive/adaptive design. Led development of the company website using WordPress with server-side adaptive decisions and client-side responsive design.
Freelance Web Developer at Self-employed
March 1, 2012 - September 23, 2025Provided HTML, CSS, JavaScript, jQuery, and WordPress development; managed project scoping, timelines, proposals, contracts, and invoicing; delivered projects on time and maintained client communications.
Tech Lead at Time Inc., People.com
November 1, 2011 - September 23, 2025Spearheaded performance-focused initiatives for Time Inc.’s People.com, including tablet-optimized, responsive design, dynamic data retrieval, in-browser data storage, and multi-section swipability. Led site-wide optimization efforts: CSS/JS consolidation, rewrite for speed and portability, and adoption of HTML5 Boilerplate techniques with reliable fallbacks.
Web & Software Specialist at National Academies of Science, Transportation Research Board
May 31, 2006 - September 22, 2025Developed conference websites, modernized registration processes, and integrated web-based databases with MS Office for reporting. Consolidated forms and improved data accuracy and turnaround times while reducing costs and manual effort.
Senior Performance Architect / UX Advocate at Estée Lauder Companies
January 1, 2022 - October 1, 2025Led performance optimization for 500+ international websites across 30 brands in 150 countries. Implemented RUM and synthetic testing, set up performance dashboards, monitored Core Web Vitals and budgets, and investigated anomalies with DevTools, WebPageTest, and other tools. Performed quarterly brand- and regional-focused audits, updated Drupal templates and front-end assets (Mustache, SCSS, JS) to implement performance improvements, and documented best practices. Automated media lazy-loading and a preload hint for LCP assets, driving significant LCP and CLS reductions.
Freelance Web Developer at Kaiserslautern, Germany (Time, Inc. freelance projects)
November 1, 2011 - March 1, 2012Hand-coded HTML, CSS and JavaScript (jQuery, JSON) for Time, Inc. projects; scoped projects, prepared proposals and contracts, delivered on time, and communicated via Skype/email/phone with clients to ensure requirements and budgets were met.
Tech Lead at Time Inc. (People.com)
June 1, 2007 - November 1, 2011Led performance optimization for People.com, including tablet-optimized responsive design, in-browser data storage, and multi-section swipability. Instituted site-wide performance improvements (HTML/CSS/JS), introduced HTML5 Boilerplate techniques, and drove cross-brand optimization programs.
Web Developer at Bank of America (Prime Brokerage)
June 1, 2005 - June 1, 2007Developed client-facing web pages, automated monthly performance updates, created dynamic investor statements, and migrated client sites from table-based to CSS-based layouts with progressive enhancement. Implemented server-side variables for access control and improved customer relations through reliable, maintainable front-end code.
Web Developer at Freelance (Kaiserslautern, Germany)
November 1, 2011 - March 1, 2012Hand-crafted front-end implementations using HTML, CSS, and JavaScript (jQuery, JSON-driven interactions). Defined and enforced project scope, produced estimates, and managed proposals, contracts and invoices. Maintained clear client communication and delivered projects on schedule.
Web Developer (Freelance) at Kaiserslautern, Germany
November 1, 2011 - March 1, 2012Delivered front-end implementations using HTML, CSS, JavaScript (jQuery) and JSON-driven interactions. Defined scope, provided estimates, and managed proposals, contracts, and client communications to ensure timely delivery.
Education
Bachelor of Science in Computer Studies at Pace University
January 11, 2030 - January 1, 2007Associates degrees, Information Systems and Web Technologies at Montgomery College
January 11, 2030 - January 1, 2004Bachelor of Science in Computer Studies at Pace University
January 11, 2030 - January 1, 2007Associate degree in Information Systems at Montgomery College
January 11, 2030 - January 1, 2004Associate degree in Web Technologies at Montgomery College
January 11, 2030 - January 1, 2004Bachelor of Science in Computer Studies at ACE University
January 11, 2030 - January 1, 2007Associates degrees, Information Systems and Web Technologies at Montgomery College
January 11, 2030 - January 1, 2004Bachelor of Science at Pace University
January 11, 2030 - January 1, 2007Associate of Science in Information Systems at Montgomery College
January 11, 2030 - January 1, 2004Associate of Science in Web Technologies at Montgomery College
January 11, 2030 - January 1, 2004Qualifications
Bachelor of Science in Computer Studies
January 11, 2030 - January 1, 2007Associates degrees, Information Systems and Web Technologies
January 11, 2030 - January 1, 2004Industry Experience
Software & Internet, Media & Entertainment, Professional Services, Non-Profit Organization, Consumer Goods, Retail, Education
Skills
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