I have been a regular editor and contributor on Wikipedia since 2012 and have finally decided to monetise my proclivity for spotting errors and fixing grammar, so rest assured that you're in safe hands.
I will proofread and edit your article, keeping in mind your need, whether it is American or British English, with colloquialism and slang or without, need for technicality, preference for minimal punctuation as per the modern trend or the good old style, etc. Track changes will be given on all articles and comments, where necessary, shall be provided.
The time frame for execution of the task will be 1 day, though shorter time frames may be honoured on request.