Experienced Node.js developer is needed to debug, fix, and deploy an existing SaaS application on a VPS (Ubuntu).

The system has already been built (backend + frontend), but it is not fully working in production and needs proper debugging and deployment.

Current Setup:

• VPS (Ubuntu – Hostinger)
• Nginx + SSL configured
• Node.js backend (Express)
• React frontend (Vite + Tailwind)
• MongoDB (currently connection issues)
• PM2 (partially configured)

Current Issues:

• MongoDB connection errors (ECONNREFUSED / DNS issues)
• Frontend not accessible or not properly served
• Application not fully running in production
• Environment variables/config may be incorrect
• Need proper Nginx routing (frontend + API)

Your Responsibilities:

• Debug and fix backend (Node.js + MongoDB connection)
• Properly deploy frontend and backend
• Configure PM2 for stable production (auto-restart, logs)
• Fix Nginx configuration (reverse proxy + static frontend)
• Ensure the app is fully accessible via domain
• Verify login/registration and core flows are working
• Clean up and standardize environment configuration (.env)

Expected Outcome:

• Live, working web app (frontend + backend)
• Stable production setup
• No critical errors in logs
• Clear instructions for running/restarting the app