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