I am interested in this project as it is exactly within my scope of expertise.
I am an 12+year experienced web/ app design and engineering consultant.
I have good experience Spring, REST service, Hibernate, and most of advanced Java technologies.
I have very good experience in development of SOA applications, websites and web portals.
Worked on integration of various API, Payment Gateways into websites and implemented open source products.
I can personally assure you that your business is very meaningful to me.