Meta/Instagram API Developer Needed to Finish Instagram DM Integration

I’m looking for an experienced Meta Developer / Instagram API developer to help me finish an Instagram messaging integration for my life-insurance lead management app. A large portion of the system has already been built. I do NOT need someone to rebuild the application from scratch. The goal is: Instagram DM → my app → lead management → appointment → Zoom → follow-up → client My Instagram account is a professional/business account. Already completed: Meta Developer app created Instagram account connected/configured Instagram messaging permissions being configured Node.js webhook backend built Backend deployed on Render GitHub repository set up Meta webhook callback successfully verified Instagram webhook fields subscribed OAuth callback route built Lead-management web app already built Meta App Review/business verification process started What I need help with: Finish Meta business/app verification requirements Review my Meta Developer configuration Confirm the correct Instagram API permissions Get Instagram DM webhook events working reliably Complete OAuth/access-token configuration Connect incoming Instagram messages to my existing app Help prepare the app for Meta App Review / Live mode Troubleshoot anything preventing the integration from working Make sure the setup follows Meta policies and security best practices Required experience: Meta for Developers Instagram API / Instagram Messaging API Meta Webhooks OAuth 2.0 Meta App Review Node.js Render GitHub Experience with AI-assisted Instagram messaging is a plus. Important: I am looking for someone who can review and finish the system that already exists. Please do not propose rebuilding the entire application unless there is a technical reason it is necessary. When applying, please tell me about an Instagram Messaging API integration you have completed and whether you have experience getting Meta apps through App Review.