Most candidates prepare the wrong things. They memorise answers, rehearse scripts, and research the company — but walk in without ever having spoken English under interview conditions. That's backwards.

In an English-language tech interview, you are evaluated on two parallel tracks at all times:

Track 1: Content

  • Is your answer relevant to the question?
  • Is it structured — does it have a beginning, middle, and end?
  • Does it show the right level of seniority?
  • Do you use specific examples, not vague generalities?

Track 2: Delivery

  • Can the interviewer follow your English without effort?
  • Is your pace comfortable — not too fast, not too slow?
  • Do you use filler words that signal hesitation?
  • Are your pauses deliberate (thinking) or nervous (stalling)?

Key insight: Most rejections happen on Track 2. Interviewers unconsciously downgrade candidates whose English delivery is hard to follow — even when the content is correct. Fixing delivery is the highest-leverage thing you can do in two weeks.

The target metrics

WhalePrep measures both tracks automatically. Here are the benchmarks to aim for before your interview:

Speaking pace

110–140 WPM

  • Comfortable for non-native listener
  • Gives you time to think mid-answer
  • Signals confidence, not rushing
Filler word rate

Below 5%

  • Below detection threshold
  • Answers sound prepared and fluent
  • Achievable in 7–10 days of practice
Before moving on — do this now
Which track do you suspect is your weaker one right now?