Hey mate, I work with myself and one other. We mainly do all our work in C#. This is done through Xamarin for all Mobile Platforms and we also develop 3d Games in Unity3d which are also programmed in C# and Java. We have been working with Unity for a very long time now, and we are very familiar with it. We have also worked on a rather large 3d FPS game in Unity3d, similar to that of Call Of Duty Zombies, which was developed and coded by me and my mate.
I am also based in Sydney Australia. If you have any questions or want to see some of my work, please send me a PM. Cheers - Luke