• Developed and maintained a robust data pipeline that manages Walmart’s extensive catalog. This pipeline, powered by Java microservices, Cassandra, and Kafka, processes billions of events daily.

• Led a critical migration project: Successfully moved over 50 Kafka topics from the public cloud to Walmart’s private cloud. This delicate task involved coordinating with over 30 teams to ensure a seamless migration without any data loss.

• Revamped test suites: Introduced functional testing and boosted code coverage to an 90% for several services.

• Tested performance for holiday traffic surge: Analyzed REST endpoints on eight applications using Walmart’s SaaS continuous testing platform. Determined the maximum throughput for a single production-like pod for each application, which was used to size the apps and prepare for Walmart’s stress testing for the holiday season.

• Designed and implemented features for TED’s robust backend systems. These systems, built on Ruby on Rails services, seamlessly communicated via Google Protobuf on Amazon Kinesis to a GraphQL service for the front end.

• Updated a critical application from Rails 5 to Rails 6. The update allowed the team to add a new framework that was incompatible with Rails 5 and prevented the application version from reaching the end of life.

• Streamlined software distribution: Migrated our internal software packages from a private server to Github Packages, allowing the team to end support for the old server and improving security.

• Developed and maintained Inventables’ eCommerce website: with a Ruby on Rails back end, React and jQuery frontend, and MySql database.

• Optimized performance: Updated the website’s caching scheme from observer-based caching to Russian-doll nesting fragment caching, significantly improving page-load times.

• Revamped shipping code: Re-wrote the site’s shipping code to integrate with our third-party-fulfillment API and support multiple shipping methods and fulfillment locations. The improved shipping code enabled the team to flexibly adjust the shipping cost and apply promotions like free shipping.

• Integrated third-party protection plans for Inventables’ best-selling product.

• Proactively set up alerts: Set up email notifications for an API error that previously failed silently. This helped us catch an unannounced API update that was causing our code to fail, which allowed us to find and fix the problem within hours.