Several of my jobs in the past were programming proprietary languages and systems. No one outside the company had experience. Look for CS background, wide exper

Several of my jobs in the past were programming proprietary languages and systems. No one outside the company had experience. Look for CS background, wide experience, quick learner, and team player attitude without arrogance. The differences in programming language details is trivial. What you will be using in the future is not what you are using now.