Java Spring + ReactJS + React Native Marketplace design and develop on top of existing backend

We have existing basic backend in Java Springboot and MySQL. Now we need to build on top of this and add various functionalities.

On front end need web apps (ReactJS) and mobile apps (React native) for business and customer and mobile app for delivery.



Best in class quality code, security and architecture expected so only bid if expertise in complete project stack. Need to be able to dedicatedly work on this and execute in very quick turnaround time. Preferably based in Bangalore and preferably can assign product team dedicatedly for this.