I am applying to many jobs since the last one week but not getting a response from a single proposal. Please check my profile, and let me know what I am missing.
Initially, the client only sees the first two or three lines of your profile before they choose whether to scroll down. Yours has nothing to make them interested. Lose the introduction and start with your years of experience and see what happens. The same is true of your proposals.
In addition to Mary's advice, you may want to check out these articles from our Hiring Headquarters to help you create proposals that win jobs, and help you boost your career on Upwork:
Let me know if you need anything else.