I have been using Excel, and writing complex macros and functions in VBA for over 25 years. Although I worked in the fields of finance and investment, many macros were created for data comparison and for importing files and then amending or cleaning them for re-export.
I have recnetly retired, so am available for interesting projects at short notice and could work up to 12 hours per day for urgent projects..
My rate may be negotiable for the right project especially as I build up my profile.