Develop AI Review Reply Tool for Google Business Profiles (MVP, Subscription SaaS)

We’re building a simple SaaS that helps businesses automatically reply to their Google reviews using AI.

Goal (MVP)
A business owner signs up, connects their Google Business Profile, and the system:

imports their reviews
generates AI reply suggestions for reviews that don’t have replies yet (existing backlog)
monitors for new reviews and generates replies automatically
lets the owner approve/post replies to Google in 1 click
charges a monthly subscription (£29/month) via Stripe

Core features

1. Auth + onboarding
Email/password or Google sign-in (your choice)
User account + basic settings (reply tone: friendly/professional/formal)

2. Google Business Profile integration
OAuth2 connection
Let user select GBP location(s) (start with 1 location for MVP)
Fetch reviews for that location
Detect which reviews already have replies vs not replied
Ability to post a reply to a review using Google’s API

3. AI reply generation
Use OpenAI (or comparable LLM) to generate replies
Reply templates should be short, polite, and match chosen tone
Guardrails: never mention “AI”, never argue with customers, handle negative reviews calmly
Store generated replies in DB with status: Draft / Approved / Posted

4. Review inbox UI
List reviews (filter: needs reply / replied)
For each review: show star rating, review text, date, reviewer name (if available)
Show suggested reply + editable text box
Buttons: Approve & Post, Regenerate, Edit & Post

5. New review monitoring
Background job/cron polling (e.g., every 10–30 mins) to fetch new reviews
Auto-generate reply drafts for new reviews
Email notification to owner: “New review – reply ready” with link to approve

6. Billing
Stripe subscription: £29/month
Block access if subscription inactive (allow trial optional if easy)
Basic admin view for users/subscriptions
Tech preferences (open to suggestions)
Frontend: Next.js/React (or similar)
Backend: Node.js/Express or Python/FastAPI
DB: PostgreSQL
Hosting: Vercel + managed DB (or AWS)
Background jobs: cron/queue (e.g., BullMQ/Redis or similar)

Deliverables

Working MVP deployed to a cloud environment
Clean codebase + README with setup instructions
Environment variables documented
Basic tests and error handling (OAuth refresh tokens, API failures, retries)
Simple UI (clean and functional, not design-heavy)
Important notes

Must use official Google Business Profile APIs and proper OAuth flow

Secure storage of OAuth tokens (encrypted at rest)

Rate limiting and sensible polling to respect API quotas

Replies must follow a “brand-safe” tone and avoid policy issues

What to include in your proposal

Similar projects you’ve built (OAuth + SaaS + background jobs)
Recommended stack and why
Timeline to deliver MVP
Fixed price or milestone breakdown