Technical interviews are often the most critical part of the engineering hiring process, yet they’re frequently done poorly. A well-designed technical interview should accurately assess a candidate’s abilities while providing them with a positive experience that reflects well on your company.
Define Clear Objectives
Before conducting any technical interview, be crystal clear about what you’re trying to assess. Are you evaluating problem-solving skills, code quality, system design knowledge, or communication abilities? Different objectives require different interview formats and questions.
Create Realistic Scenarios
The best technical interviews mirror real work situations. Instead of abstract algorithm problems, present candidates with scenarios they might actually encounter in the role. This gives you better insight into how they’ll perform day-to-day and gives candidates a realistic preview of the work.
Focus on Thought Process
How a candidate approaches a problem is often more valuable than whether they reach the perfect solution. Encourage them to think out loud, ask clarifying questions, and explain their reasoning. This reveals their analytical skills and communication style.
Collaborative, Not Adversarial
Frame the interview as a collaborative problem-solving session rather than an interrogation. Offer hints when candidates get stuck, and create an environment where they feel comfortable asking questions. This approach reduces anxiety and produces more accurate assessments.
Provide Multiple Opportunities
One interview session might not capture a candidate’s full capabilities. Consider multiple interview rounds with different interviewers and formats—coding challenges, system design discussions, and behavioral questions each reveal different aspects of a candidate’s skills.
Give Constructive Feedback
Regardless of the outcome, provide candidates with specific, actionable feedback. This shows respect for their time and effort, enhances your company’s reputation, and helps candidates improve for future opportunities.
Final Thoughts
Remember that technical interviews are a two-way evaluation. While you’re assessing the candidate, they’re also evaluating your company. A positive interview experience can be the difference between landing top talent and losing them to competitors.
Calibrating Your Interview Panel
Even with structured questions, two interviewers can read the same answer very differently. Calibration is unglamorous but essential: have your panel debrief together on the first few candidates against the same rubric, talk through disagreements, and explicitly agree on what each rating level looks like. Without it, your “bar” drifts month to month.
When to Use a Take-Home
Take-home exercises shine in some situations and harm hiring in others:
- Good fit: roles where unsupervised problem-solving is the actual work
- Good fit: when you can keep it under three hours and pay for the time
- Bad fit: when candidates already have full-time jobs and limited evenings
- Bad fit: when the take-home masks how someone thinks in real time
Watch the Candidate Experience
The interview itself is part of your employer brand. Slow responses, vague rejections, and adversarial questioning all show up in Glassdoor reviews and in the network effects of who refers you to the next candidate. Respect the candidate’s time as a baseline — not as a courtesy.
Avoiding Interview Theatre
The biggest trap in technical interviews is mistaking confidence for capability. A polished candidate who has rehearsed a specific algorithm question can look strong while telling you nothing about how they think under genuine ambiguity. Counter this by:
- Asking at least one question the candidate clearly hasn’t prepared for
- Following up with “why?” on every confident answer
- Watching how a candidate handles being wrong — calmly, defensively, or with curiosity
- Giving an open-ended design problem with no single right answer
The interviews that hold up six months into the hire are the ones that revealed real thinking, not rehearsed answers.