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Learning from your mistakes is great. However, it is even better to be able to learn from the experience of others, especially when it comes to costly blunders that can ruin your career prospects. As everywhere else, in the field of development, you need to stick to the golden mean. For example, it is not recommended to work in one place for a long time, although it is also not advisable to change tools or employers too often. Therefore, the most important advice for novice programmers is to steer clear of extremes. Let’s move on to a more detailed overview of the biggest career mistakes developers make.