Mainak Chakrabortty

• As an independent contributor to the Billing team, my role focuses on delivering a seamless experience for paid customers by implementing an alternate payment interface. This initiative has a significant impact on a global user base of ~ 300 million.

• Contributed ideas and suggestions in team meetings and delivered updates on deadlines, designs, and enhancements.

• Revised, modularized and updated old code bases to modern development standards, reducing operating costs, and improving functionality.

• Worked as a lead Frontend Engineer for one of the merchant tool's projects called assortment excellence which provides omnichannel experience to merchants and planners associated with Walmart.

• The project involved using complex, interactive grid design for optimal user experience. It involves react as a core library and a micro frontend framework (developed by walmart internal team) as a base to build application.

• Written End to End Automation test for the entire application using walmart's own in-house tool built on top of selenium and ProtractorJs

- Working as Frontend Developer for Vertica (analytic database management software) product. - Redesigned and Implemented workflow for creating a new cluster using Management console (It is Vertica in-browser monitoring and management tool to create, configure, manage, and monitor Vertica databases and their associated clusters) on AWS the environment which improved better user experience compared to the earlier. - Worked along with UX team to provide better user experience, Implemented Micro-frontend architecture using React on top of AngularJS, JSP, Jquery.

• Worked closely with Deutsche Bank as a Lead Frontend Developer to develop a Financial Agent Portal to help agents to analyse and visualise their potential and growth. • Oversaw 50% of major new enhancements with better performance to an existing application by incorporating libraries such as ng-select (To handle large data in dropdown improved by ~60%), D3js (Enhanced Chart Rendering and create the interactive complex chart). • Developed new features to the existing application to help agents to set and track their targets periodically with Data-driven visualisation using D3Js framework focusing on better user experience • Implemented Export as PDF functionality from a complex web page with Puppeteer as a library by Crawl a SPA (Single-Page Application) and generate pre-rendered content (i.e. "SSR" (Server-Side Rendering)) which improved both pdf quality with lesser size ~100kb and generation time ~8 seconds