Applied through their site. The HR team are nice people.

First interview was with a junior engineer. They jumped right into the technical exercise and weren't going to introduce themselves until I asked. They were patient, helpful, and answered all my questions thoroughly.

Second interview was with an engineer who apparently does lots of interviews. They spoke with a strange accent, and it was very hard to understand what they said. They didn't know much about OOP, kept interrupting, and asked questions with each line I wrote. Also, they gave brief answers to my questions.

Implement a linked list.

Given a collection of linked lists, provide the list with the minimum length.

Given a collection of linked lists, provide the list with the minimum sum.

Implement a machine with a stack and memory. Implement a method that takes a list of instructions and executes them on the machine, then outputs the last element on the machine's stack.

How would you build an OCaml-like syntax using that machine?

Now, given an expression in the structure you've built, convert it into a list of instructions that can be run on the machine.