Custom or White-Label Messaging App (20–200 Users) — WhatsApp/Discord Style

Job ID: 40627816

Budget: £20 – £250 GBP

We are looking for a developer to build or customise a cost-effective, private enterprise communication platform for a small company (20 to 200 users total).
It does not need to be an exact clone of WhatsApp—a system inspired by WhatsApp, Discord, or similar messaging platforms works well, provided it covers our core access, permission, and monitoring requirements.

Budget & Codebase Requirement:
- Budget-Conscious: This is for a small user base (up to 200 users), so we are looking for a lean, affordable solution, not a massive enterprise budget project.
- Code Maintenance & Ownership: We are not interested in generic off-the-shelf CodeCanyon templates. We prefer freelancers/agencies who have their own clean, proprietary messaging source code/framework that can be customised for us, or someone can build it from scratch within a short period of time.
- Easy Future Modifications: The source code must be well-structured, documented, and easy to modify so our internal team or future developers can easily maintain and add features down the line. Full IP/source code transfer is required.

Essential Requirements:
1. Account Registration & Strict Privacy Controls (Mandatory)
2. Key-Based Access Control
3. Multi-Device Pairing (Primarily, we can go for only the web version)
4. Messaging & Permission Restrictions
5. Calling & Group Restrictions
6. Monitoring & Security (No Location Tracking)
7. Private Deployment & Full Code Transfer

How to Apply:
Please include the following in your proposal:
- Approach & Cost: Do you recommend customising your own pre-existing messaging framework or building custom? How do you keep the cost low for a 20–200 user scale?
- Codebase Maintainability: What technology stack/framework do you use, and how easily can another developer modify your codebase in the future?
- Experience & Portfolio: Examples of messaging platforms, permission systems, or enterprise monitoring apps you have built.
- Quote & Timeline: Realistic fixed price and phase-by-phase time estimate.

Budget: Low / Affordable proposal target for small team deployment.
Contract: Freelance contract with NDA and full IP/Source Code assignment agreement.