•Followed the innovations in web technologies, and determined howthe teams would adapt to them and what features should be included in the project.•Conducted weekly team meetings to facilitate cross-pollination of techniques and strategies.•Collaborated between teams and planned the release cycle of projects.•Mentored each of my teammates in biweekly one on one meetings to boost their job satisfaction and professional development.•Reviewed the pull requests/commits for the projects and made decisions about how they would affect the project in the future. •Implemented templates/layouts/web pages based on accessibility, responsive and user-friendly structures using new CSS practices.•Designed and developed a designer API to customize the style of all components in Prime libraries(PrimeNg, PrimeReact, and PrimeVue).•Designed and developed new UI components and new features to respond to users' requests and facilitate their use.

•Designed and developed responsive web pages and admin layouts/templates using SCSS, HTML5, PrimeFaces, PrimeNG, PrimeReact, PrimeVue and some component libraries such as Chart.js, FullCalendar.•Designed and developed open-source UI/CSS utility libraries named PrimeReact, PrimeVue, and PrimeFlex.•Migrated Angular.js library (PrimeNG) to Angular 2+.•Used module bundlers like Rollup and Webpack for UI libraries. •Handled tasks pertaining to cross-browser compatibility concerns.•Developed user-friendly and responsive UI components according to W3C/WCAG standards.•Worked with accessibility tools such as JAWS, NVDA, and AXE.•Maintained all these projects/open-source libraries and provided support services to clients on JIRA, GitHub and public forums.•Mentored my teammates and planned new releases of products by assigning them weekly tasks.

•Implemented a lot of server-side UI components for the open-sourcePrimeFaces library.•Used JSF, Java, Javascript, JQuery, Ajax, HTML and CSS3.•Worked with CSS pre-processor tools namely LESS and SASS to implement Admin dashboard pages and templates.•Designed and developed UI libraries named PrimeNG and PrimeUI using Angular.js and JQuery.