Full-Stack Next.js Engineer - Local SEO + Google Reviews Dashboard (multi-tenant)

THE 10-SECOND VERSION We help local businesses see two things in one clean dashboard: where they rank on Google, and all their Google reviews, with one-click AI-written replies. First client is already live and the data pipelines work. We need an engineer to turn it into a polished, repeatable product we can stand up for any new client in a day. WHAT WE'RE BUILDING (MVP = 2 tabs) A multi-tenant web dashboard. Same codebase serves any business we sign; onboarding a new client is dropping in a config, not writing new code. Tab 1 - Heatmap: For each client location, a Google Map with a grid of colored pins showing where they rank in Google's local pack for their key search terms (green = top 3, down to red = not ranking). Rank data comes from the Local Dominator API (we have an account). You pull it, store it, render it as a real map pin overlay. Tab 2 - Reviews: For each location, pull the business's Google reviews via the Google Business Profile API. Show good (4-5 star) vs bad (1-3 star) counts. For positive reviews, a Draft Reply button generates a reply (cheap/free LLM), runs it through a humanizing pass, weaves in the client's keywords, and posts it back to Google in one click. Negative reviews are view-only plus a report action with a running tally. STACK (where it is today) Next.js 16 (App Router), React 19, TypeScript, Tailwind, shadcn/ui, Vercel. Data: Local Dominator API (heatmaps), Google Business Profile API v4 (reviews + replies). A working demo is already deployed and a full written spec exists. We are open to your input on the architecture if you see a cleaner way to do the multi-tenant layer, data sync, or reply pipeline. WHO WE NEED Strong Next.js / React / TypeScript, shipped real production apps. Comfortable with third-party REST APIs and Google OAuth (Business Profile API experience is a big plus). Bonus: maps / geo-grid / pin-overlay work, multi-tenant SaaS, local-SEO or reviews products. Clean, maintainable code and clear communication. HOW IT WORKS Milestone-based. You get paid as each lands: 1) Heatmap tab - Local Dominator pull + map pin overlay + color thresholds. 2) Reviews tab (read) - GBP reviews pulled, good/bad counts per location. 3) Reply pipeline - draft reply (LLM + humanizer + keywords) + one-click post to Google. 4) Multi-tenant config - new client = new config, no code changes. We have a detailed spec and the first client's data ready to hand over on day one. TO APPLY (keep it short) 1) A Next.js + API-integration app you shipped (link if you can). 2) Any Google API / OAuth experience - have you taken an app through sensitive-scope verification? 3) Your rough take on milestone 1 - how you'd pull and render the heatmap data. 4) Your availability and how you'd want the milestones priced. We move fast and pay on time.