I have a billing software already running at my client. i can show you demo if it fits in your requirement.
Relevant Skills and Experience
I have more than 13 yrs exp as Architect, Tech Lead, Developer in C#,Asp.net, MVC, VB.Net, XML, SQL server, WebAPI, Xamarin, WPF
Proposed Milestones
₹7777 INR - 10% token, 60% on delivery, 30% on your testing completion
Additional Services Offered
₹1 INR - 1 month free support
Thanks