Your path into quantitative finance
QuantFinanceWiki is a free, ad-free guide to quantitative finance careers. It carries 26 step-by-step career roadmaps, 1557 real interview questions with worked solutions, and hiring notes on 99 firms.
Pick the roadmap for the role you want, track your milestones, and drill the question bank until the offer. Quant trader, quant researcher, and quant developer paths are covered separately because the desks screen for different things.