Dear Madam, Sir,
After carefully reading your job posting, I am certain I can do it perfectly. I have a Master's degree in Information Technology and a very long experience in web development, blogging, SEO and online marketing. I was the manager of Google Developers Group in my city for three years which gave me very good communication, technical and more important, programming skills. I am a new freelancer, however, I am certain that you will be very pleased with my professional work, I am a native Arabic and French speaker and I master English fluently.
Thank you for your consideration, Sincerely.