Tech industry employment is a seller’s market firmly on the side of top talent, but competition for the best jobs remains fierce. Candidates cannot skate by on common skillsets and expect to secure the lucrative salaries, prestige, and perks for which the tech sector has become known. Companies today use advanced tools and tests to weed out the pretenders and identify the people who bring truly valuable skills to the table. Unfortunately, many tech workers — even some of the best — don’t know exactly where they stand. To combat that knowledge gap, workers are turning to the same types…

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