Blockchain developers now rank second among the top 20 fastest-growing job skills, and job postings for workers with those skills have more than doubled this year.

Taking second fiddle only to robotics specialists, blockchain technologists are advertising their services for as much as $115 per hour, according to Upwork, an employment site that specializes in freelance workers.

Next in the list of fastest-growing job skills is another blockchain-related topic: Bitcoin cryptocurrency developers.

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