Dear Hiring Manager,
I have gone through your job posting and become very much interested to work with you. I am an expert in these fields. I have already completed several projects like this. For evidence you can see my profile. I have excellent command over English. I am a hard worker, productive and worthy of your attention I hope, I would be the right candidate for this post. Awaiting an affirmative response from you.
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Kinds Regards,
Mehedi Hasan.