No, for three reasons: 1. Nobody expects someone your age to have many years of continuous employment at one company on your CV. You're young. Capitalize on it

No, for three reasons: 1. Nobody expects someone your age to have many years of continuous employment at one company on your CV. You're young. Capitalize on it. 2. Programming jobs have a fairly high turnover rate anyway. There is the tacit assumption that if you want better terms you'll find another job. 3. Nobody will ever think less of you for leaving an unfair employer. If they see many short stays on your CV they may start to wonder if you're the problem, but one or two aren't enough to be an indicator. Also, as your CV gets larger, you can omit 3 month jobs that didn't work out, and simply not talk about them while searching for a job.