I worked as in-house software developer by creating and maintaining applications in several companies for more than 10 years, I now decided to move on and do freelancing.
My duties were, but not limited to, collecting needs and requirements, analysis them then creating complete software or modules for existing solutions, and finally implementing them in production.
Regarding technologies, I use mainly Microsoft technologies from Access/Vba and Visual Basic 6 to .NET platforms with VB.NET winforms and wpf and some web applications using C# as well.
About databases, I had to deal with Access, MySQL, SQL Server and Oracle. So I manage pretty well SQL and both T-SQL and PL/SQL languages too.