Walked interviewer through a codebase I wrote in the past and talked about what I would improve. Goal is to show competency and ideally teamwork and communication skills. The interviewer also asked the basic questions about what I was interested in, why, etc

Great, got back to me in time, friendly staff and the interviewer was respectful and nice. Applied through fast track and I got acceptance within a week of applying. I recommend applying early and also being genuine in your interview