MarketAxess Senior Software Engineer interview questions

.5 hr phone call with recruiter. -good experience discussed my background and what I was looking for. .5 hr phone call with tech manager. -good experience asked Java questions HashMap/TreeMap, Concurrency, Big O performance 1 hr code pair on Hacker Rank - LRU 1 hr code pair on Hacker Rank - Degree of Array The last code exercise was required to run successfully in Hackerank but was not allowed to use the IDE that you are comfortable with. Very difficult in a 45 minute interview.