Hi.
I read your job description carefully and understood your requirements.
As a WordPress expert I have been built many websites, theme/plugins and work over than 10 years of PHP, JavaScript, CSS master. Available to be fix any critical errors in a short time.
I have full-time for you and will be available at any time as you want.
I can fix any critical problems immediately, keep your deadline/quality and also work on your time.
Let's discuss more details over chat.
Regards.