Software Development Experience
.NET/C#
I have worked in .NET/C# for the last 15 years professionally. The bulk of my open source projects in that time have been in .NET.
Javascript
Since I've been fulfilling a full-stack development role I've spent a lot of time working in Javascript for the last 15 years as well.
C/C++
The earliest software I wrote was in C and for a time I developed exclusively in C++. I only use these professionally in a small capacity for some legacy utilities.