Complete Immigration Platform Integration

My immigration form automation platform is already in development; core flows run, but the system cannot go live until all external touch-points are wired in, secured, and fully tested. The most urgent work is integrating three services that the product depends on every time a user prepares or submits an application:

• Payment gateways – handle one-time filing fees and optional expedited-service upsells, complete with webhook-based status callbacks and PCI-compliant token storage.
• Document verification services – automatically scan uploads (passports, birth certificates, etc.) and return authenticity scores we can persist in the user record.
• User authentication services – enterprise-grade SSO / social-login plus standard email-password flows, all tied to the existing role-based permissions model.

Current codebase exposes REST endpoints and a React-driven UI; the missing integrations touch both sides, so you’ll be working end-to-end. You’ll receive repo access, API keys, and a brief architecture walk-through on day one.

Deliverables (definition of done)
1. Fully functional integrations for the three services above, committed, pushed, and merge-ready.
2. Environment-specific config for staging and production, with secrets abstracted.
3. Unit and endpoint tests proving happy-path and common failure scenarios.
4. A concise implementation note explaining setup, API limits, and any recurring cron / webhook jobs.

Code should follow the existing lint rules, TypeScript types, and commit convention; CI must pass before hand-off. I can demo the current state and clarify anything you need—let’s get this platform launch-ready.