How a German Backend Engineer Built Interview-Ready English

Candidate Snapshot

He prepared for English-language interviews as a backend engineer. The stack was Kotlin. Written English was stronger than speaking under time pressure.

Why the Interviews Were Difficult

Interviewers are not grading your accent. They need to follow your reasoning in English. He was a backend engineer in Berlin. Day-to-day work used Kotlin. In the room, coding interviews were what broke down.

Interview Strategy

Practice matched the round he actually had to speak: coding interviews. Each mock interview included notes on the same answer - where he paused, which words were vague, and where the structure broke.

• Thought aloud in English: constraints, approach, then code.
• Practised explaining time and space complexity in complete sentences.
• Clarified the requirements in English before writing code.
• Used debugging language out loud when a test case failed.

Useful references along the way: What to expect in English interviews, Pronouncing numbers and metrics.

The Difference

Gained clearer, more confident English for interviews. He could explain coding-interview explanations more clearly when questions got hard. That readiness was the goal - not a promised job offer.

What to Practise

• Say the constraints and your approach before you write code.
• Practise complexity in English: time, space, and why you chose this structure.
• Narrate while you type. Silence is hard for the interviewer to score.
• Have a ready phrase for uncertainty, such as: I do not know yet - here is how I would check.

Why Coding Interviews Are Difficult in English

A coding interview scores how you think, not only the final function. You have to clarify the problem, talk through an approach, name complexity, and debug in English. Engineers who solve silently often fail the communication bar even when the code would work.

Preparing for a similar path? Read How a Backend Engineer From Germany Prepped for English Interviews.