we need php codigineter and Android mobile app expert for exiting app modification

please this is a partner appeal, we need a very good expert in mobile java app developer and blockchain
and php codigineter developer, the first work i wish to do is to modify our existing app by 1 making refer code work without hiting a separate icon, then 2 add new explain button for vidoe explanation,no 3 chat and registration fixing which all he need to do is to add the sha-key the reupload it on google playstore