Mobile App - ERP integration

Hi, I'm looking a mobile app development. Requirement to develop mobile app (apple & android), it'll be developed and improved in different versions. Current version to include : Event Management workflow Core features to include; * App to install by users to connect multiple databases of client instances ( client 1, client 2, client 3....etc..) * App to support normal registered user & admin (security levels & permissions * Integrate with Odoo database to push and pull the data Version 1 - Event Management : This version to include the key workflow to mange event workflow. User features; * User download the app & settings (database, user name & pw) to connect to the Odoo database * Member Registrations and payment * Updates to any of the details / dependent details (which will be updated in the database) * Check the Events (real-time check with odoo database) * Register for the event & pay * Check for the event tickets (QR Codes) * Show the ticket -QR code at the event to enter (once used and logged, they can't show again or enter) Admin features; * Check the members * Check the events & attendees * Send tickets (re-issue tickets) to attendees at the event, select the event to register attendees * open the smart phone camera, scan the QR code * Check the validity as member and event registration * if it is valid, update as 'Attended' (button icon, ) * if it is invalid, register take payment and allow to enter * check the number of registered and attendees attended Work with the Odoo developer to properly design the architecture and share the source code and files of the app development.