Next-Gen AI-Powered Construction ERP App Development -- 2

Job Title: Expert Flutter/React Native Developer for Next-Gen AI-Powered Construction ERP App

Job Description:
I am looking for a top-tier mobile app developer or development team to build an advanced, AI-powered Construction & Machinery Management App. The app needs to be highly automated and intelligent to support on-site supervisors and provide the owner with seamless control.

Key Requirements & Ultimate Features List:

1. Role-Based Access Control (RBAC):
- Admin (Owner) Mode: Full access to financial metrics, materials, supplier logs, and advanced AI dashboards.
- Supervisor Mode: Highly restricted. Can only see assigned sites, logs, and upload operational data. Financial graphs and material rates must be completely HIDDEN.

2. Smart Manpower & Labor Management:
- Labor Profiles: Name, Photo, Aadhaar Card Upload, Category (Mason, Helper, etc.), and Daily Wage Rate.
- GPS Geo-Fenced Attendance: Supervisors can ONLY mark attendance if they are within a 50-100 meter radius of the designated construction site using GPS.
- Voice-to-Text Entry: Integrated mic button allowing supervisors to speak entries (e.g., "Varachha site, 2 Masons, 5 Helpers present") instead of typing.
- Advance/Kharchi System: Log cash advances given to labor on fixed dates (specifically on the 10th and 20th of the month).
- Monthly Settlement Cycle: Auto-calculates Net Payable based on total monthly attendance minus advances, to be settled between the 1st and 5th of the following month.
- Labor Absenteeism Prediction (AI): System flags labor profiles showing erratic attendance patterns to predict potential project delays or turnarounds.

3. Material & Supplier Management (STRICTLY ADMIN-ONLY):
- Material Inward: Logs quantity of incoming materials (Cement, Steel, etc.) per site.
- Material Shortage Alert: Smart threshold notifications when stock drops below minimum safety levels (e.g., less than 50 bags of cement).
- Financial Ledger: Supplier profiles, bill entries, amounts paid, and pending dues with automated Supplier Payment Due Reminders.
- *Supervisor View Restriction:* Supervisors can only enter the quantity of materials received. Financial rates, bills, and supplier names must be completely HIDDEN from them.

4. Site Cash & Petty Cash Management with AI Scanner:
- Track cash handed to supervisors for daily site expenses.
- AI Bill Scanner (OCR): When a supervisor takes a photo of a site expense receipt (tea, minor tools, transport), the AI must automatically extract the Date, Vendor Name, and Total Amount to autofill the expense entry.
- Real-time Balance: Auto-calculates (Cash Received - OCR Scanned Expenses = Closing Wallet Balance) so the owner knows exactly how much cash the supervisor holds.

5. Machinery, Tools & Task Management:
- Inventory tracking for owned and rented machinery (JCB, Mixers, Vibrators).
- Track which machine is deployed at which site and for how long.
- Machinery Idle Time Tracker: Monitors 'Running' vs 'Idle' status to prevent wasted rental costs on-site.
- Daily Task Manager: Admin assigns daily tasks from the dashboard; supervisors receive push notifications and mark tasks as 'Done' upon completion.

6. Advanced Core & Safety Features:
- Offline Mode Support: Local data caching for remote sites with zero network. Auto-syncs to cloud once internet is restored.
- Daily Site Photos: Mandatory 2-3 site progress photos required before supervisors can close the daily log.
- Emergency SOS Button: A prominent distress button in the supervisor app that immediately alerts the owner with live GPS location in case of site accidents or emergencies.
- Smart Weather Integration: Automatically pulls local live weather forecasts and alerts the Admin if heavy rain is predicted, preventing material damage during concrete pours.
- WhatsApp Integration & AI Bot:
a) One-click button to share automated Gujarati text summaries of payment settlements to labor via WhatsApp.
b) Admin WhatsApp Bot: Owner can text specific commands (e.g., "Varachha Site Status") to a dedicated WhatsApp number and instantly receive a snapshot report powered by the app database.
- Reports: High-fidelity PDF/Excel export functionality.

Please reply with your portfolio showcasing advanced ERP, AI (OCR/NLP), or tracking applications. Provide a breakdown of costs, estimated milestones timeline, and post-delivery maintenance support structure.