I interviewed at FlexTrade Systems Inc. (London, England) in May 2026
Interview
First took me through an intro call, which was simple enough explaining my career from start to finish. I'm a junior dev, so I focused mainly on my one previously role, talked about arch, day to day and core language uses and application.
Recieved a private LeetCode link to complete within 7 days, was told 2 hours to complete but the LeetCode timer was set to 3 hours.
Passed 4/5 test cases, took 2h27 to submit the single question. Did a bit of digging after submitting - found this specific problem was not public. Really enjoyed the challenge, but my code must not have been flexible enough (that fifth test case failing caught me so bad and I couldn't get my head round it annoyingly - big fluster). Did not receive next round invite.
I applied online. The process took 2 weeks. I interviewed at FlexTrade Systems Inc. (London, England) in Nov 2025
Interview
Had a quick call with HR about the process, then sent a HackerRank (which could only be done in Java) easy(ish) lc. Then a half an hour behavioural interview with a senior engineer, before on-site which was 2 hours or so, another simple Java problem on the whiteboard, a simple math/data structure problem, and then general behavioural and team experience questions, from engineers on the team and then with the team lead. Rejected a couple days later, said other candidates were a better fit.
Interview questions [1]
Question 1
Do you like working in a small team? Have you ever done a project where you've owned the whole stack end-to-end? What's your process for debugging something? Tell me a time you had to manage conflict.
I applied online. I interviewed at FlexTrade Systems Inc.
Interview
Standard with screening call and followed with virtual interview with higher ups. Both interviewers were working while interviewing which is fine given their roles, however, they were outwardly rude if my answer wasn’t what they were looking for. They also started the interview 10 minutes late.
