Web & Android App for ePayYatra
Budget: ₹400 – ₹750 INR
I run two digital-service portals, ePayYatra and ePanMitra, and I now need both a refreshed web experience in PHP and a companion Android application. The scope centres on four concrete features that must work seamlessly across web and mobile:
• Payment gateway integration (current shortlist includes Razorpay and Paytm; I’m open to your recommendations if you can justify clear advantages).
• Secure user authentication with session management and OTP flow.
• A reliable, filterable transaction history for every user.
• Tight, well-documented REST-based API integration so the two platforms stay perfectly in sync.
The existing codebase is in core PHP with a MySQL backend, so familiarity with that stack is essential. All new endpoints should follow REST principles and be version-controlled on Git. The Android side should be built in Android Studio (Java or Kotlin—your choice, but keep the architecture modular and future-proof).
Acceptance criteria
1. End-to-end payment flow tested in sandbox and live modes.
2. JWT-based login that passes penetration testing.
3. Transaction logs render <200 ms for 10,000 records.
4. Postman collection and inline PHPDoc for every new API method.
5. APK published to an internal track on Play Console ready for my QA.
I will provide existing source files, API keys, and UI mock-ups the moment we start. Let me know your timeline, the specific payment library you prefer, and one example of a similar PHP+Android job you’ve shipped.
• Payment gateway integration (current shortlist includes Razorpay and Paytm; I’m open to your recommendations if you can justify clear advantages).
• Secure user authentication with session management and OTP flow.
• A reliable, filterable transaction history for every user.
• Tight, well-documented REST-based API integration so the two platforms stay perfectly in sync.
The existing codebase is in core PHP with a MySQL backend, so familiarity with that stack is essential. All new endpoints should follow REST principles and be version-controlled on Git. The Android side should be built in Android Studio (Java or Kotlin—your choice, but keep the architecture modular and future-proof).
Acceptance criteria
1. End-to-end payment flow tested in sandbox and live modes.
2. JWT-based login that passes penetration testing.
3. Transaction logs render <200 ms for 10,000 records.
4. Postman collection and inline PHPDoc for every new API method.
5. APK published to an internal track on Play Console ready for my QA.
I will provide existing source files, API keys, and UI mock-ups the moment we start. Let me know your timeline, the specific payment library you prefer, and one example of a similar PHP+Android job you’ve shipped.