Hi,
As I understand you have requirement for add-on for Google sheets, forms and sites.
Keen to work on this project.
Let me introduce myself as an expert in Google spreadsheets and Google docs. I am well versed with scripting in Google spreadsheets using Apps script, writing custom functions in Google spreadsheets, creating charts, custom functions, linking spreadsheets etc.
I would be happy to answer any queries that you may have.
Looking forward to working with you.
Based on discussion we can agree on price and timeline.
Thanks