Dear Hiring Manager,
Your job post has caught my attention because I'm a technical writing addict and I’m considering your job for me with these required capabilities. I have already written some technical articles and I can provide you samples. I believe my capabilities would be perfect for your project.
Moving forward, I can dedicate 25 hours/week to your company, and my daily hours are negotiable. I’m very excited to assist you in making your blog successful. Please feel free to contact me through Skype.
Looking forward,