Behavioural & Culture Fit Interviews

What this area actually covers

A behavioural interview asks you to describe things you have already done, on the theory that past behaviour predicts future behaviour better than a hypothetical does. The questions are variations on a small set of stems — a conflict, a failure, something you owned, a time you influenced someone, a time nobody could tell you what the requirement was — and the answers are scored against a list of competencies written down in advance. Everything arbitrary-feeling about the round becomes legible once you accept that the interviewer is not forming an impression of you: they are collecting evidence against named criteria and will have to defend the rating afterwards.

Three things get wrongly bundled in. Salary, notice period and levelling are the offer conversation, which has different rules and a different counterparty. Culture fit, in a company that hires competently, means alignment with how the team works — how disagreement is handled, how much autonomy is expected — not whether you would be fun at lunch. And "tell me about yourself" is not a warm-up; it is scored on whether you can choose what matters out of ten years of material.

There is a fourth confusion worth heading off, because it changes how you should prepare. A behavioural question is not a hypothetical. "How would you handle a disagreement with your tech lead" and "tell me about a disagreement you had with your tech lead" look like the same question and are graded differently: the first invites a philosophy, the second demands an episode with a date and a person in it. If you answer the second with the first, you have produced no evidence, and an interviewer who is short of time may not push you back onto the rails.