Advanced SaaS Security Guard Management Software

Build Advanced SaaS Security Guard Management System (FastAPI + Flutter + React)
We need a full-stack developer/team to build a SaaS-based system for a security agency platform.
Roles include SuperAdmin, Admin, HR, Client, Supervisor, Field Officer, Guard & Operations.
Key features: Geo-fence based attendance, HRM, CRM, Billing & Accounting modules, Mobile app (Flutter).
Role Description

SuperAdmin Controls entire SaaS, subscription management, tenant setup
Admin (Company Owner) Manages company, clients, staff, billing
HR Handles attendance, payroll, KYC, leaves
Client Can view deployed guards, attendance, invoices
Supervisor On-field monitoring, guard attendance approval
Field Officer Ground inspections, report generation
Security Guard Uses mobile app to check-in/out within geo-fence
Operations Team Manages scheduling, deployment, and alerts
Layer Tech

Frontend Web React + Tailwind + Redux Toolkit
Mobile App Flutter (Android + iOS)
Backend API FastAPI (Python)
Database PostgreSQL
Storage AWS S3 or DigitalOcean Spaces
Auth JWT + Role-Based Access Control
Deployment Docker + Render / AWS / DigitalOcean
Payments Razorpay API
Map & GeoFence Google Maps API or Mapbox SDK
Notification Firebase Cloud Messaging (Push) + Twilio / SMS
PDF Generation WeasyPrint / ReportLab