Cross-Platform Member Management System

I’m building a centralised member management platform that works seamlessly through a responsive web portal and companion mobile apps. Three core capabilities are essential:

• Member registration with editable profiles
• Membership subscription handling, secure online payments, and automated renewals
• Event and activity tracking with attendance, RSVP, and history tools

The system must recognise three permission levels—Admin (full control and reporting), Member (self-service features and payments), and Guest (view-only, join prompts). A single, well-documented API should power both front-ends, and all data must remain secure and GDPR-compliant. Email authentication plus optional social sign-in fits best, while Stripe or an equivalent PCI-compliant gateway can process payments.

Deliverables
• Web portal fully deployed to my hosting environment
• iOS and Android apps published to the respective stores
• Complete, readable source code with setup documentation
• Short hand-over session covering administrative workflows

Let me know which tech stack you recommend and share links to similar projects so I can confirm we’re aligned on quality and timeline.