Full-Stack Developer Needed for Music Creator Platform

We’re looking for a full-stack developer to turn our existing Next.js campaign dashboard into a fully working client portal for KORA, a music marketing agency. The frontend and design already exist. We need someone to build the backend connections and make the dashboard functional. The portal must: * Pull campaign and creator data from Google Sheets * Update automatically when our team changes creator selections, statuses, costs or campaign details * Display live TikTok and Instagram performance data collected through Apify * Calculate campaign spend, remaining budget, targets, views, engagement rate and CPM * Allow clients to view drafts, approve or reject creators/content, request changes and leave comments * Provide secure client logins so clients only see their own artists and campaigns * Display live video previews, links and creator-level performance * Be deployed to an affordable production host such as Vercel or Cloudflare Required experience: * Next.js, React and TypeScript * Google Sheets API * Apify API and webhooks * Backend/database development * Authentication and client permissions * Vercel or Cloudflare deployment * TikTok and Instagram data integrations Please share relevant dashboard or client portal examples, your recommended technical approach, estimated cost and timeline. We want to retain the existing design rather than rebuild the frontend.