How to Conduct Technical Interviews in English

Conducting a technical interview in English requires more than just understanding the candidate’s answers — you need precise language to ask probing questions, signal expectations, and deliver fair feedback. Whether you are a senior engineer, a tech lead, or an engineering manager, mastering interview English will help you assess candidates more accurately and represent your team professionally.

Opening the Interview

A strong opening sets the tone and helps the candidate feel comfortable. Use structured, professional phrases to begin.

• “Thanks for taking the time to speak with us today. We’ll spend about an hour together — I’ll ask some technical questions, and you’ll have time to ask questions at the end.”
• “Feel free to think out loud as you work through problems — I’m interested in your reasoning, not just the final answer.”
• “There are no trick questions here. If you’re unsure, just walk me through your thinking.”

Key Vocabulary

Probe — to ask follow-up questions to explore a topic more deeply. “I’d like to probe a bit deeper into how you handled the database bottleneck.”

Calibration — the process of aligning scoring and expectations across interviewers. “After all interviews, we’ll hold a calibration session to compare our ratings.”

Signal — evidence from a candidate’s answer that indicates a skill or trait. “That answer gave me a strong signal on their system design thinking.”

Structured interview — an interview format where all candidates receive the same questions in the same order. “We use a structured interview process to reduce unconscious bias.”

Behavioural question — a question asking a candidate to describe a past experience (often starting with “Tell me about a time when…”). “Behavioural questions help us understand how a candidate has acted in real situations.”

Rubric — a scoring guide that defines what a good, acceptable, or poor answer looks like. “Before the interview, review the rubric so your scoring is consistent.”

Bar raiser — an interviewer whose role is to maintain hiring standards, often from outside the immediate team. “Our bar raiser flagged a concern about the candidate’s communication under pressure.”

Debrief — the post-interview discussion where interviewers share assessments. “Let’s schedule the debrief for 4 PM today while our impressions are still fresh.”

Phrases for Asking Technical Questions

Avoid vague or leading questions. Use precise language that opens up the candidate’s thinking.

• “Can you walk me through your approach to solving this problem?”
• “How would you design a system that needs to handle ten million users per day?”
• “What trade-offs did you consider when you chose that solution?”
• “Tell me about a time when you had to debug a critical production issue under time pressure.”
• “How would you explain this concept to a junior engineer on your team?”

Probing Follow-Up Phrases

When an answer is shallow or unclear, use follow-ups to dig deeper without leading the candidate.

• “That’s interesting — can you say more about why you chose that approach?”
• “What would happen if the data volume was ten times larger?”
• “You mentioned caching — how would you handle cache invalidation in that scenario?”
• “Was there another option you considered? Why did you rule it out?”
• “How did that decision turn out in practice?”

Calibration Language

During debrief sessions, use neutral, evidence-based language.

• “I’d rate this candidate a ‘strong hire’ based on their system design depth.”
• “I noticed a gap in their understanding of concurrency — let’s discuss whether that’s a blocker.”
• “My concern is that their answers were theoretically correct but lacked practical depth.”
• “Are we aligning on what ‘good’ looks like for this role?”

Giving Feedback After Interviews

When delivering feedback — especially rejection — use professional and constructive language.

• “We appreciated your time and found your experience impressive. However, we’re looking for a stronger background in distributed systems for this particular role.”
• “Your technical skills are solid, but we felt there were gaps in how you communicated complex ideas to non-technical stakeholders.”
• “We’d encourage you to apply again in six months — this feedback is about fit for this role, not your overall capability.”

Professional Tips

1. Avoid binary questions. Questions with yes/no answers give you little information. Prefer “How would you…” over “Can you…?”
2. Silence is normal. When a candidate pauses to think, do not rush them. It often signals careful reasoning.
3. Stay neutral. Avoid nodding enthusiastically or frowning — body language signals can bias candidates.
4. Document immediately. Write notes during or right after the interview, not from memory the next day.

Practice Exercise

1. You are interviewing a candidate for a backend engineering role. Write three probing follow-up questions you would ask after they say: “I’ve worked a lot with microservices.”
2. A candidate gives a technically correct but very brief answer. Write two phrases you would use to encourage them to elaborate without leading them.
3. At the debrief, a colleague says “I just didn’t like how they answered.” How would you redirect the conversation toward evidence-based assessment?