UK Interview Format
How to prepare for a UK Technical Interview
Duration
45-90 minutes
Difficulty
Hard
What it is
Technical interviews assess your ability to do the role's actual work in real time. For software engineers: live coding (LeetCode-style or pair programming, 45-90 minutes). For data scientists: case-based modelling, sometimes live notebook work. For consultants: case interviews with frameworks. For designers: design exercises or live whiteboarding. The interviewer watches you think aloud, asks clarifying questions, and assesses your problem-solving approach as much as the final answer.
Who uses it
Universal in UK technical hiring (engineering, data science, design, quant). Standard at consulting firms (case interviews). Common in finance for analyst and associate roles (modelling tests). Sometimes in sales (mock customer pitch). Increasingly in product management (prioritisation exercises, hypothesis tests). The format and style varies by company; Big Tech uses systematic LeetCode rounds, growth-stage SaaS often uses pair-programming on real codebases.
How to prepare (step-by-step)
- 1 Identify the specific format the company uses (LeetCode, pair programming, case, design exercise) — usually the recruiter shares this.
- 2 Practise the format with peers via Pramp, Interviewing.io, or with friends — solo practice misses the live-feedback dimension.
- 3 Aim for 80%+ of practice exercises completed correctly under timed conditions before the real one.
- 4 Prepare for the meta-skill the interviewer scores: thinking aloud, asking clarifying questions, breaking problems down systematically.
- 5 Practise communicating your reasoning even when uncertain — interviewers reward articulating uncertainty over fake confidence.
- 6 For coding: keep code clean, name variables clearly, talk through edge cases.
- 7 For case interviews: structure your approach using a framework, but adapt to the specific question rather than forcing a generic framework.
What this format assesses
- →Whether you can do the role's core work under pressure
- →How you think and communicate when stuck — the recovery skill, not just the success skill
- →Code quality, structure, problem decomposition — not just whether you reach the answer
- →How you handle clarifying questions and ambiguity
Common mistakes
- ✗Silent thinking — the interviewer can't score what you don't articulate
- ✗Going straight to code without clarifying questions — you'll solve the wrong problem
- ✗Over-engineering or over-framework-ing — interviewers want the right scope, not the most complex
- ✗Defending wrong answers when corrected — flags poor coachability
- ✗Not practising the format with peers — solo practice misses 30% of what real interviews test
Recruiter pro tip
The single highest-leverage technical interview move is the first 90 seconds: ask 2-3 clarifying questions before writing a line of code or starting a case. This signals senior judgement, gives you time to think, and often surfaces information that simplifies the problem materially. The candidates who jump straight in are the ones who solve the wrong problem and run out of time.