web performance optimization , Javascript, Vercel, CSS, Typescript, Scrum, Cdn, Agile, HTML, AWS, Azure, Graphql, cloud environments, ISR, component-based frontend architecture, Next.js, Sitecore JSS SDK, Sitecore AI, CI CD pipelines, SSR, Sitecore XM Cloud, headless CMS, API-first architectures, Sitecore Content SDK, Caching