The project existed since 2011, a server-side rendering application consisting of 4 SPAs, created using AngularJS and they started migrating to ReactJS in 2016. The back-end was built with Spring MVC and Spring Boot. We have written microservices in Spring Boot, with Unit tests and performance tests, We have done React with Typescript, ReactJS components, AngularJS modules, npm library, Webpack configuration, BEM CSS, Sass styles, Styled Components, Mobx state management, Unit test cases with Jest, Cross-browser compatibility, Semantic HTML and responsive UI, Adobe Analytics, Functional-tests using Cucumber Java, Performance tests with Scala, Jenkins CI-CD, AWS Deployment, We followed Agile Methodologies, Test Driven Development, KanBan, Pair Programming. Analysed requirements and designed, developed and implemented software applications for multiple websites. Determined coding requirements for site creation, including e-commerce capability and specialised scripts. Also done 24 hours of tech support for the web application.