I have detailed the job spec in the Google doc which I've linked below. This should give you an idea for the scope of the project and the developer awarded the job will be given access to the files via SFTP and access to the database.
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Dear,
Hope you are doing well,
i have read your document Xero integration i 'll do it.
i have 6 year plus experience in php technologies i need to discuss with you regarding to integration so please come chat and discuss.
Regards,
Hitesh kumar gupta