Wait for the written offer. Don't negotiate during screening calls or before they've decided they want you. When you receive the offer, express enthusiasm. Ask for - days to consider it. "Thank you so much. I'm excited about this opportunity. I'd like to review the details and get back to you by [date]. Is that okay?" This gives you time to prepare.
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$ curl repovive.com/roadmaps/job-search-strategies/salary-negotiation/when-to-negotiate
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