What’s Hot (and Not) in Tech Skills

The article explains a supply-and-demand way to judge tech skills and job titles. It calls the result a “Demand Ratio,” where values above 1 mean demand is higher than supply and values below 1 mean the opposite.

Reading notes

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• Demand Ratio is calculated by normalizing supply and demand, then dividing demand by supply.
• “Hot” skills have a number higher than 1; less in-demand skills have a number lower than 1.
• The chart uses the top 700 technology skills and top 400 job titles in the dataset, but defaults to 200 for performance.
• Red points mark hot skills, blue points mark less-in-demand skills, and the black line separates the two groups.
• The chart suggests demand is centered on DevOps, front-end development, and Big Data.
• Examples of in-demand skills named in the text are ASP.NET, Angular.js, MongoDB, Hadoop, NoSQL, AWS, and HTML5.
• Legacy technologies such as COBOL, Mainframe, and Solaris appear among the less in-demand skills.
• The article says management titles tend to be high supply and low demand.
• It says project managers and business analysts also show the same pattern.
• The chart was built with C3.js on top of D3.js.