A few months ago, Stack Overflow published the terrible news that developers using spaces to indent their code earn more money than those using tabs, based on responses to the company's annual developer survey.
Today, Stack Overflow announced a slightly more useful application for that same data, with the Stack Overflow Salary Calculator. Tell it where you live, how much experience and education you have, and what kind of developer you are, and it WIll tell you the salary range you should expect to make in five national markets (US, Canada, UK, France, Germany) and a handful of cities (New York, San Francisco, Seattle, London, Paris, Berlin, Toronto).
Some of the broad trends are no big surprise; for example, the chosen cities tend to pay more than their respective nations do, for example, a reflection of both their high demand for developers and their higher living expenses. Similarly, DevOps specialists and data scientists both earn well. This won't surprise anyone who follows the fashionable industry buzzwords; businesses are increasingly working to streamline and integrate their development and operational roles to make regular software deployments easier and more reliable, putting DevOps skills in high demand. Data science is similarly sought after with the growth of machine learning, data mining, and visualization.