Vercel + Anthropic API Deployment — AI Sales Assistant App (PWA, Mobile-Ready)

I am looking for a developer familiar with GitHub and Vercel who can help finalize a project into a desktop and mobile app. The work involves completing the build, ensuring the app runs smoothly across platforms, and preparing it for deployment. Experience with similar projects and the ability to deliver a polished, functional final product are important. Please share relevant examples of past work and your approach to finalizing and deploying applications. Description: I've built a comprehensive AI-powered sales assistant for my manufacturing company's distributor network. The AI knowledge base is complete and tested. I need an experienced developer to handle the technical deployment so the app is live, secure, and installable on iPhone and Android within 2 weeks. What's already done (you don't build this): Complete chat UI in a single index.html file Vercel serverless API proxy (/api/chat.js) that calls the Anthropic Claude API Full system prompt / knowledge base written and tested MBT branding, color scheme, and UI design finalized What I need you to do: Set up a private GitHub repository and push both deployment files Connect the repository to Vercel and deploy — storing the Anthropic API key as a secure environment variable (never in code) Configure a custom subdomain (e.g. assist.meltblowntechnologies.com) with SSL via Vercel Add Progressive Web App (PWA) support — manifest.json, service worker, correct meta tags — so the app installs cleanly on iPhone (Safari) and Android (Chrome) from the browser with no App Store submission Add a simple password gate (single shared PIN entry on first visit, stored in localStorage) so the app is not publicly accessible Test the full flow end-to-end: desktop browser, iPhone Safari install, Android Chrome install Provide a brief handoff document explaining how to update the system prompt and redeploy (I'll be doing this regularly myself) Tech stack: Frontend: Vanilla HTML/CSS/JavaScript (single file, no framework) Backend: Vercel serverless functions (Node.js) API: Anthropic Claude API (claude-sonnet-4-6) Hosting: Vercel (free tier) No database required What I'm NOT looking for: A redesign of the UI — it's done A React/Next.js rewrite — keep it simple App Store submission Ongoing maintenance contract (though open to discussing) Ideal candidate: Has deployed to Vercel before Understands PWA requirements for iOS (tricky — Apple has specific manifest requirements) Comfortable with Anthropic or OpenAI API integrations Clean communicator — I'm not a developer, I need plain English updates Can complete this in under a week Deliverables: Live working URL with custom domain and SSL Installs correctly as PWA on iPhone and Android Password gate working GitHub repo set up and connected to Vercel for easy future deploys One-page handoff doc Budget: $500–$1,000 fixed price (open to negotiation for the right candidate) Timeline: Complete within 7–10 days of project start To apply, please answer: Have you deployed a PWA to Vercel before? If yes, share a link or brief description of that project.