Hi,
I have read all the requirements carefully and I am the right person for the job.
I I already have done many payment gateway integrations like PayU, RazorPay, Stripe, Google Pay, Paypal etc.
I can integrate payment status async callback which will update your payment status.
I have 3+ years of experience in .NET Framework, C#, XML, JSON, Web API, MVC framework, JWT Authentication, Azure Cloud Service, Mongo DB, SQL Server.
Kindly send me all the details for more clarity and the proper deadline for the task.