Talked to an engineer in Austin for the expansion of their New York office and equities trading. He took most of the time asking for work history and technical questions. He left about 10 minutes at the end for a fairly simple coding question but that's where the trouble started. The platform is extremely broken: - There's a checkbox to turn off autocomplete but it didn't work, the editor kept overwriting what I typed. - Compiler errors and warnings weren't highlighted in either the editor or the output window so I had to spend a lot of time squinting at line wrapped black+white verbose g++ output to find the line number for each error. - Segfaults didn't show what line they happened on so I had to spend way too much time bisecting with printf's to find the problem. - Printf also doesn't work because the environment doesn't have flush on newline enabled so even the bisection was harder than it needed to be. 10 minutes wasn't enough to deal with all these editor bugs so I failed. I sent them an email with videos documenting all this in the test environment but they ghosted me. I don't feel like it was a fair assessment of my abilities whatsoever and frankly they wasted my time. Optiver has a reputation for blacklisting candidates who don't do well so I would recommend not talking to them as long as they're using a shared coding web interface.