What language(s) has the application/service been developed in?

General
1

What language(s) has the application/service been developed in and what are their versions? I.E. PHP, Rails, Java, C++, C#, .Net etc.

2

TypeScript / JavaScript
C# .NET

We do not publicise versions but in general we migrate to latest stable versions quickly so as to obtain latest standards, security fixes and performance updates.