Very nice procedure. Send in resume. Get invited for three math tests. Phone interview. On site interviews with HR and traders. I want to give you some advice. Really practice mental math. Not just math based on paper but also when someone asks you in person. Furthermore prepare some badic Statistics in particular EV, and be quick with that. Furthermore make sure you are accurate in the interviews and do not make too fast decisions of you are not sure. Its better to wait longer then make a mistake. In the end that is what made me not get an offer. For the rest: come in relaxed and dont be stressed. Be focussed, but dont let stress take over. Do some mock interviews with similar questions in order to get used to it. Also dont think they will ask the most hard questions. The brainteasers were quite doable, the hard part was answering them under pressure.

spent about 1.5 months pretty much purely dedicated to preparing for interviews for all the pre-penultimate programs (Optiver, IMC, JS, SIG, Citadel, etc). I used these resources: Green book (Really good starter but I got bored of it after a few weeks) EverythingQuant (Went through literally every single interview prep question, went through the interview guides, and completed the probability course just to make sure I covered all bases) Briefly read through this guide Watched coding Jesus in my spare time (not sure if this helped directly lmao but he’s a great creator and very informative)