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I have a business that uses multiple Google Spreadsheets that I have created over a few years. I need someone who is very experienced in Google Spreadsheets programming to interface or migrate my extremely complex and large Google spreadsheets to a Google API or a single real centralized database. My data has gotten way too big for Google Spreadsheets to handle it, resulting in huge delays and constant refreshing of the sheet and cells. You should be well versed in advanced Google Spreadsheet functions (arrayformulas, importrange, filters, queries, pivot tables, sql, etc) and creation of complex formulas to achieve my system needs. I look forward to hearing from you.