Come prepared with stories that showcase your problem-solving skills and creativity. Project confidence and capability but also humility and willingness to learn. Be honest about your experience and skills---don't downplay your ability, but don't lie and say you have more experience than you really do.
Also, a lot of what you do in this position is fitted to your experience and interests, so communicate those clearly. At the same time, they also want you to be flexible and willing to try new things.
You will probably go through several rounds of interviews about different tasks--coding, linguistic analysis, and talking about your background and experience. The interviews aren't too long, but be prepared for the process.