Mobile to Tally API intergration

I need a clean, reliable bridge between my mobile and Tally so that product, party and invoice data stay perfectly in sync. The integration has to work both ways: my app must be able to push freshly-created... (Budget: ₹1500 - ₹12500 INR, Jobs: API Development, JSON, Mobile App Development, MySQL, PHP, RESTful API, Software Architecture, XML)