How to prepare for a technical job interview
A technical interview is rarely just about technology. Here's how to prepare for the questions that really matter.
An interview for a technical role is rarely decided by technical knowledge alone. The employer mainly wants to know how you think, how you collaborate and whether you fit the way the team works. Good preparation makes that visible.
Before the interview
Pick three projects from your career that you know in detail: what was the problem, what exactly did you do, what was the result? Almost every behavioural question can be answered with one of those three stories. Reread the vacancy and note where your experience matches exactly, and where it doesn't: questions are guaranteed on that second list. Also look up who your interviewers are. A conversation with a production manager runs differently from one with an HR manager: with the first you can dive deeper into the technology, with the second your motivation and collaboration count most.
During the interview
Answer concretely. 'I have a lot of PLC experience' convinces less than 'I migrated the controls of two packaging lines from S7-300 to S7-1500'. Details make you credible, even if you can't answer every question perfectly. Don't know something? Say so honestly and explain how you would find out. In technical environments a reliable colleague who knows their limits weighs more than someone who improvises an answer to everything. And if you're handed a practical case, think out loud: the interviewer wants to see your reasoning, not just your final answer.
Questions you ask
Prepare at least three questions of your own. Ask about the machine park or technology, how the team is composed, and what success in this role means after a year. Your questions show your level as much as your answers. Dare to ask the sharper ones too: why is this role open, what happened to your predecessor, where does the team get stuck today? And remember: you evaluate the employer as much as the other way round.
After the interview
Send a short thank-you message within a day or two and repeat in one sentence why the role appeals to you; it keeps you on top of the pile and shows professionalism. If you hear nothing within the agreed period, do follow up: showing interest is not weakness. And if it became a no, ask for concrete feedback. Half of employers give it, and it is free preparation for your next interview.
Frequently asked questions
What do I wear to a technical job interview?
Neat but realistic: a clean shirt or sweater almost always suffices; a tailored suit is more odd than impressive in technical environments. In doubt, look at what the company itself radiates on its site and socials, and sit one step above that.
How do I handle a question I don't know the answer to?
Say so honestly, and immediately show your approach: what would you check, whom would you consult, which similar problem did you solve before? Interviewers remember the way of thinking longer than the missing fact. Bluffing is the only truly wrong answer: in technology a professional sees through it instantly.
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