Do High Security in Android Reward App

Job ID: 32866556

Budget: $200 – $300 USD

Hi, I have an android App Project but this app is hackable. Hackers can get the API URL and parameters and request in PostMan or other tools to claim many points without doing our app task. So I want to make my app security high. Even If the hacker catches the API URL and parameter he should not able to add points to her balance without doing our app task.

Note: You have to provide me APK after your work and I will test and try to hack. If I got an issue then you have to solve it. You have to solve until I got no issue. Payment is not mattered but our work should be 100% secure. So if you are not able to do it then don't bid.

I will provide my app source code, you have to work under my project.
*Networking Library Volley
*Android Java
*Database MySQL
*API response JSON
*Server-side PHP