Short, repeatable drills for the skills S&T interviews actually screen. Every run earns XP; streaks earn badges.
90 seconds of desk arithmetic: P&L, edge, spread capture, hedge cost. Speed here is a literal interview screen.
60 seconds of the reasoning chain interviews test: data → Fed → yields → prices. Missed questions come back first.
THE classic trading interview game, against a bot interviewer. Quote a two-way on a hidden value and update from the flow.