At Walmart, I was a key contributor on a performance-focused team that drove measurable improvements to Google's Core Web Vitals (CWV) across millions of product pages. By moving these pages from "Poor/Needs Improvement" to "Good" in Google's CWV categorization, we unlocked significant SEO gains with real business impact.

First Input Delay (FID) – Before its deprecation, I led efforts to reduce P75 FID from over 300ms to under 50ms. This involved deep analysis of performance traces, React profiling, and real-device testing. We identified and optimized a heavily used component causing excessive re-renders, resolving the primary input bottleneck.

Largest Contentful Paint (LCP) – We pioneered the use of the then-new 103 Early Hints in partnership with our CDN, allowing clients to begin fetching stylesheets and LCP-critical assets during server response time. This significantly improved LCP, bringing P75 times below the 2.5s threshold.

Interaction to Next Paint (INP) – When INP became a Core Web Vital, we rapidly improved our P75 from over 1000ms to under 200ms. This was achieved through splitting long tasks, reducing React re-renders, optimizing hydration, and strategically triggering full-page navigations to improve responsiveness.

Our team’s work allowed Walmart to outpace its ecommerce peers in CWV score improvements, and our innovations with Early Hints and our INP-related performance improvement patterns served as a model for future performance work across the company.

I write and maintain a number applications that are used by thousands of PayPal employees every day to efficiently service customers, primarily built using Electron (NodeJS, React, TypeScript) and various .NET technologies (ASP.NET Core, ASP.NET MVC, ASP.NET Web API, ASP.NET WebForms, WPF, Windows Services).

• Maintained and developed new features for various web apps and services supporting the client's worldwide customer service operations using .NET MVC, WebForms, Web API.

• Integrated new web-based tools into the WPF-based desktop application used by customer service and back-office teammates, providing significant benefits in case delivery & workforce management efficiency vs. working with these tools outside of our application.

• Implementation of new website pages and features through design and creation of database schema, development of internal web-based content management systems, writing of service methods, controller actions and Razor views to retrieve and display dynamic content from the database, and enablement of rich client-side interactions through JavaScript

• Participation in the collaborative decision making process regarding overall software architecture and contribution to refactoring and restructuring efforts aimed at enhancing the extensibility, maintainability, and testability of the application

• Identification and resolution of slow/problematic database queries, decreasing server response time for certain pages by more than 50%

• Development of an automated shipment tracking system through integration of DHL, USPS, and UPS REST and Web Services APIs

• Technologies: C#, .NET MVC, LINQ, Entity Framework, Visual Studio, TFS/TFVC, WCF, MS SQL Server, T-SQL, SSMS, JavaScript, HTML5, CSS, JIRA