I applied in-person. The process took 2 weeks. I interviewed at Portofino Technologies (London, England) in Dec 2022
Interview
30 minutes intro to get an idea of the business and discuss overall fitness, followed by 3 or 4 1-hour live coding tests with different members of the team.
Interviews fairly transparent and knowledgeable about both technology and trading.
Interview questions [1]
Question 1
Depends on interviewer, but topics include systems programming, computer architecture, algorithmic problem-solving, C++ proficiency, and trading logic (order books and matching engines).