WordPress NGO Certificate & ID Module

I have an existing live NGO website built on WordPress. I need an experienced WordPress/PHP developer to add a Member Management Module with automatic Member Certificate and Member ID Card generation.

Scope of Work
1. Member Management
Add new members
Edit/Delete members
Search members
Auto-generate unique Membership ID
Upload member photo
2. Member Certificate
Generate certificate from a predefined template
Auto-fill:
Member Name
Membership ID
Date
Designation (if applicable)
Download as PDF
Print option
3. Member ID Card
Generate printable membership ID card
Include:
Member Photo
Name
Membership ID
Designation
QR Code (preferred)
Front & Back layout (if required)
Download as PDF
Print option
Technical Requirements
Must work with the existing WordPress website.
Should not affect the current website functionality.
Clean and secure coding.
Responsive design.
Easy-to-use admin panel.
Deliverables
Complete working module
Installation on the live website
Source code
Basic documentation (if required)
Bug fixes after delivery
Please Mention in Your Proposal
Have you developed a similar WordPress plugin/module before?
Will you build a custom solution or customize an existing plugin?
Estimated delivery time.
Total project cost.
Portfolio or demo of similar work.