Fullstack Developer for Social Network and Marketplace -- 2

I am looking for a fullstack developer to build both a social network and marketplace for my business. The developer should have significant expertise in JavaScript, HTML, and CSS; React.js and Java; Node.js and MongoDB; and Sveltekit, Python, and Supabase. It is critical for the project to be built with scalability in mind at the highest level. My goal is to create both a social network and marketplace that can rapidly grow and expand as demand increases.