(Title of the Official to whom you are writing the letter)
(Name of the company/entity to whom you are applying)
Dear (Title of the Official you are addressing the letter),
I am interested in applying for (State the position for which you have applied and also mention your source of the information). The skills I have developed (Feel free to talk of your previous work in similar designation and mention your skill sets) and my educational qualification does make me a perfect candidate for the said job.
As you can see from (talk of your resume specially highlighting your previous experience with a similar position in the past. Remember, the contents of your résumé must corroborate what you say).
Please feel free to reach me at (give the telephone number or mail id). Hope for the positive reply from your side.