One-hour technical phone screen followed by a one-week project assignment. The technical phone screen started with going over resume and motivation for applying for the job. The technical questions were as standard as they get (see below). For the one-week project assignment I was given a spreadsheet with Black-Scholes volatility market data at various strike price and option maturity, together with the results of calibrating three different stochastic models to the volatility surface (Normal, CEV and SABR). The task was to write a 1-2 page technical article that compares the three models and discusses how they are relevant for modelling the volatility surface. After one week of hard work I submitted the assignment and they kept me hanging for next 6 (six!) weeks without a real decisive response. They initially said they would get back by the end of the week, but then kept postponing several times giving bogus excuses and breaking their own timeline promise. When they finally resolved not to move forward with my application, the very brief rationale/feedback they gave me was a bit disrespectful and sort of meaningless (as if that was the case I should not have been invited for the interview at all, let alone pass the technical phone screen). It felt like a complete waste of time at that moment. Overall, I was highly disappointed in how they treat candidates and would never ever consider applying here again.