I have worked with clients in my timezone (EST) and on the opposite side of the world (Qatar which is +8 hours). For everyone involved, it's usually better to be in a close timezone but it's ultimately up to the engineer and company. In my case, the client in Qatar had flexible hours to work around my schedule so I didn't feel much of an impact.
What's great about TopTal is they often post timezone and overlap requirements with the job description. For instance, a job posting might say PDT and requires at at least 4 hours in "overlap" (meaning the company and candidate must overlap 4 hours work each day).
I have never turned down (or been turned down) for a job because of timezone with TopTal -- hopefully that helps answer your question!
It does, thanks!
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