Dear Client !
I’ve carefully gone through your job description and so I am very interested in your project.
As a senior mobile app /web developer with more than 6 years experience, I have confident to complete your project within specified time.
I'd be more than happy to offer my service, so feel free to contact me for an interview.
I need your idea, then it will be implemented by me.
I am ready to start work immediately and dedicate full time to you.
I look forward to hearing from you.