Four parts.

1. Introduction with HR.
2. Coding challenge. Fairly easy. You will mess up more fighting the interface or the compiler of the website. Simple AWS questions. General technical interview that goes over your coding challenge and some software engineering questions.
3. Fit interview. Talk about a problem you had at a workplace or how you resolved it. Use the STAR method.
4. Design interview. Design a schema for a system. I would suggest using names of actual technologies. It is like drawing a system diagram on something like draw.io or Lucidcharts.
5. Algorithms interview. Using an online compiler, do some programming challenge. About medium level on HackerRank.

Where would traffic go in this AWS load balancer configuration?