UX front end responsive designer needed to improve and resolve design issues between mobile and web and creating modern design.

We need a responsive website and complex chat app design. We would like you to improve our current design with specific attention on UX design. We need a permanent modern reponsive front end designer to join our team in development of a exciting new chat app and business directory. We would prefer if the person or company is situated in Mumbai near our office but people with a good portfolio can also apply. UX design is critical. must be strong in mobile design and view and be able to desigh graphics. There is a scope for long terms work and growth.