Microsoft .Net C# expertise is the key of your success, for all your projects:
- Mobile Cross-platform hybrid apps development: XmaDevLab (with SharpKit compiler)
- Html5/JavaScript development: SharpKit compiler with JS->C# library bindings
- Big Data projects: for example, Hadoop
- Server development: Microsoft ASP.Net, Mono (or JavaScript server like Node.Js)
- Mobile native apps, for specifics projects: Xamarin solution
Microsoft Visual Studio is one of the best tools for the developers: a very efficient tool.
And Microsoft provides a lot of enterprise solutions.