"What programming language skills do employers want? Online job-search firm Indeed took a look at three months (18 May to 18 August) of 2018 job listings in its tech software category to find out. The company ranked programming languages according to the percentage of job postings within the category that included mention of the language."
https://spectrum.ieee.org/view-from-the-valley/computing/software/what-programming-language-skills-do-employers-want
https://spectrum.ieee.org/view-from-the-valley/computing/software/what-programming-language-skills-do-employers-want