Hello,
I have gone through your requirements, you want build a android app to scan QR code and store it on app.
So, Yes I am ready to do this job.
It's really easy task for me and I am ready to do it now, waiting for your reply.
Let me tell you about myself, I am fresher on this platform but I have worked on more than 50 android applications in five years of my professional career.
I have expertise in android development, full knowledge of Android life cycle - Material design - REST api - Sqlite database - Payment integration - Third party library integration - Background services - Firebase.
One more thing I am full time freelancer so will always available for support and communication.
Let me know if you are interested, I am ready to discuss everything before you award me this task.
Thanks,
Hardip