Stripe & One Payments Integration

I need Stripe and One Payments smoothly integrated into both my website and its companion mobile app. The goal is a seamless checkout experience that recognises the user’s device, displays the right payment options, and processes transactions securely with tokenisation, 3-D Secure and webhooks for real-time status updates.

You will be working with existing front-end code (React for web, Flutter for mobile) and a Laravel backend. Clear, well-commented commits are essential so my in-house developer can maintain the solution later.

Please send a concise but detailed project proposal that outlines
• the integration approach for each platform,
• any SDKs or middleware you plan to use,
• estimated timeline with key milestones (sandbox setup, staging test, production launch),
• post-launch support you can offer.

Deliverables
1. Fully functional Stripe and One Payments flows on web and mobile (card, wallet and local method support where available).
2. Secure server-side endpoints with validation and error handling.
3. End-to-end test cases and walkthrough video demonstrating successful payments and refunds.
4. Deployment notes sufficient for repeat setup in new environments.

I will provide API keys, current repo access and staging credentials once we agree on the plan.