Dear Client!
I've just read your job description carefully. I am very interested in this job and I think that I am suitable to this job.
Because I have a lot of experience with C, C++, PHP, Python, Javascript...
I have examples to show you. I can prove my skills.
I can work on flexible timezone including weekends.
If you give me a chance, I am willing to work professionally for you with high quality, very fast development.
I'm always ready to discuss with you.
Thank you and I look forward the opportunity to work with you.
Best Regards!