Dear Sir,
With reference to your job application in "freelancer." submit myself as an applicant for the post advertised. Particulars regarding my Qualification and experience are attached in my freelancer profile. I believe my skills would be ideal for your project. I'm very interested in your job post involving these skills.
I am sure you would give me a chance to try my hand. I assure you at the same time that I shall do my level best and prove the correctness of your choice.
Tanking you,
Sincerely
Geethani