Decagon Interview Questions

All 18 of Decagon's recorded questions come from Software Engineer loops, with no data or research interviews mixed in, so what you see here is the whole bar. Coding carries 10 of them and the prompts wear the product on their sleeve: track CSAT over a sliding window, keep a rolling conversation score as new ratings arrive, tie satisfaction tracking to call timing. Under the customer-support framing these are deque and heap problems with an expiry rule, and interviewers tend to care more about how you handle the window boundary than about which structure you reach for. Two questions break that pattern. One parses nested logs into exclusive CPU time per function, a stack problem in disguise. The other counts the legal tic-tac-toe sequences reachable from an empty board, which is recursion and pruning with no tidy closed form. Design work is thin, 2 prompts in ML system design and 2 in general system design. 12 of the questions sit at medium, and 8 open in a console with 8 written solutions behind them. 13 of the 18 were asked in a technical screen, so the coding bar arrives before you speak to anyone about architecture, and fewer than half the bank is readable without premium.