SIM-Based CRM Calling App

I am looking to develop a full-featured CRM system with SIM-based calling capabilities based on TeleCRM. The system should consist of three user roles: Admin, Sales Manager, Telephone Agent, and should include both a web admin panel and an Android mobile app for Telephone Agent.

Key features:

Login and access control:

- Login via company assigned credentials
- Role based access:

Admin > Sales Manager > Telecaller

Sales Manager Panel (Web):

- Add/Manage Telecallers
- Assign leads to team members
- View real-time call history (answered, missed, busy, etc.)
- Track lead status
- Manage campaigns via A/B testing (tags, segmentation)
- Performance reports:
- Outgoing calls
- Conversion rate
- Call duration
- Filters: Lead status, tags, Telecaller
- Add notes and schedule follow-ups
- Export reports (CSV/Excel)

Telecaller Android App (SIM based calls):

- Calls assigned leads via mobile SIM
- Automatically detect call status (answered, missed, busy, rejected)
- Update lead status (e.g. interested, follow-up, converted)
- Add notes and set reminders
- View call/action history
- Automatically syncs with backend when online
- Minimizes battery and data usage Design

Admin Panel:

- Manage all users (Sales Managers and Call Center Agents)
- System monitoring and data management
- Database export/import tools
- Limit/credit allocation (if required)
- Global system setup

Additional features (similar to TeleCRM):

- Lead tagging and segmentation
- Custom call results and lead status
- Campaign-based reporting (for A/B testing)
- Missed call recovery feature
- Bulk lead upload via Excel
- Daily task checklist for call center agents
- Call performance dashboard (e.g. conversion rate, follow-up trends)
- Push notifications for new leads

Ideal Developer/Team Requirements:

- Experience building SIM-based call apps
- Strong backend + frontend web experience (React, Vue, etc.)
- Experience using Firebase or REST API for real-time sync
- Proven UI/UX skills for admin and mobile interfaces
- Understanding CRM workflows and performance tracking

What we deliver:

1. Admin Panel (Web)
2. Sales Manager Panel (Web)
3. Telecaller App (Android - SIM based)
4. Database with real-time sync and lead management
5. Reporting, exporting and push notification system

What to include in your proposal:

- Schedule and budget
- Links to relevant past work or demos
- Proposed technology stack
- Questions or improvement suggestions

If you have read my proposal in detail and think you can do it, please put my name in the first sentence of your bid.

And if you are a boat, you will say HI or HELLO at the beginning.

Let me know if you are a good fit! I look forward to your proposal.