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Software Engineer interview questionsTechnical Interview round

A 60 min interview plan with a time-boxed script, what each question is for, and the signals to score against. Key skills: Programming Concepts, Technical Knowledge, Design Patterns, OOP Principles, Debugging.

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Introduction

5 min
•

Hi, I’m [YOUR_NAME], and I’m a [YOUR_TITLE] at [COMPANY_NAME]. I’m excited to learn more about your technical skills today.

•

Could you briefly introduce yourself and share your experience with software development?

What this question is for, and what to listen for

Purpose

Assess communication skills, relevant experience, and initial confidence.

Signals to score

  • Clear introduction provided
  • Relevant technical experience mentioned
  • Specific skills highlighted
  • Response is concise and organized
  • Understanding of role requirements
  • Enthusiasm for the role
  • Alignment with team values

Follow-up questions

  • What projects have you enjoyed working on?
  • How does your background align with our team’s work?
  • Can you share a technical challenge you’ve overcome?
•

Great, thank you for sharing! In the next 50 minutes, we’ll dive into some technical questions to assess your skills and problem-solving abilities.

Programming Concepts and Technical Knowledge

15 min
•

Can you explain the difference between a stack and a queue?

What this question is for, and what to listen for

Purpose

Evaluate understanding of data structures.

Signals to score

  • Correct definitions provided
  • Examples given
  • Differences clearly explained
  • Understanding of use cases
  • Mention of LIFO and FIFO
  • Clarity in explanation
  • Confidence in response

Follow-up questions

  • What operations are common to both?
  • Can you give a real-world example of each?
  • How do you implement a stack in a programming language?
•

What is a RESTful API and why is it important?

What this question is for, and what to listen for

Purpose

Assess understanding of web services and APIs.

Signals to score

  • Correct definition of REST
  • Importance explained
  • Mention of statelessness
  • Understanding of HTTP methods
  • Examples of RESTful services
  • Clarity in explanation
  • Confidence in response

Follow-up questions

  • How does REST differ from SOAP?
  • What are the key components of a RESTful API?
  • Can you describe a situation where you used a RESTful API?

Design Patterns and OOP Principles

15 min
•

Can you describe the Singleton design pattern and its use cases?

What this question is for, and what to listen for

Purpose

Evaluate knowledge of design patterns.

Signals to score

  • Correct definition provided
  • Use cases explained
  • Mention of instance control
  • Understanding of thread safety
  • Examples given
  • Clarity in explanation
  • Confidence in response

Follow-up questions

  • How do you implement a Singleton in your preferred language?
  • What are the advantages and disadvantages?
  • Can you give a real-world example?
•

What are the four main principles of OOP?

What this question is for, and what to listen for

Purpose

Assess understanding of object-oriented programming principles.

Signals to score

  • Correct principles listed
  • Examples provided
  • Understanding of each principle
  • Clarity in explanation
  • Confidence in response
  • Mention of encapsulation, inheritance, polymorphism, abstraction
  • Real-world examples

Follow-up questions

  • Can you explain each principle briefly?
  • How do these principles benefit software design?
  • Can you provide examples from your experience?

Debugging and Problem-solving

15 min
•

How do you approach debugging a complex issue in your code?

What this question is for, and what to listen for

Purpose

Evaluate problem-solving and debugging skills.

Signals to score

  • Clear strategy outlined
  • Use of debugging tools
  • Logical problem-solving approach
  • Examples of past experiences
  • Confidence in response
  • Mention of testing and logging
  • Clarity in explanation

Follow-up questions

  • What tools do you use for debugging?
  • Can you describe a challenging bug you fixed?
  • How do you ensure the issue is resolved?
•

Describe a time when you had to solve a difficult technical problem.

What this question is for, and what to listen for

Purpose

Assess problem-solving skills and technical experience.

Signals to score

  • Clear problem description
  • Logical approach explained
  • Successful resolution
  • Examples of teamwork
  • Confidence in response
  • Mention of learning outcomes
  • Clarity in explanation

Follow-up questions

  • What was the problem and how did you identify it?
  • What steps did you take to solve it?
  • What did you learn from the experience?

Time Management, Task Ownership, and Collaboration Skills

10 min
•

How do you prioritize tasks when working on multiple projects?

What this question is for, and what to listen for

Purpose

Evaluate time management and prioritization skills.

Signals to score

  • Clear prioritization strategy
  • Examples of past experiences
  • Mention of tools or methods
  • Confidence in response
  • Clarity in explanation
  • Understanding of deadlines
  • Ability to adapt

Follow-up questions

  • What tools do you use to manage tasks?
  • Can you describe a time you had to prioritize tasks?
  • How do you handle conflicting priorities?
•

Describe a situation where you had to collaborate with a team to complete a project.

What this question is for, and what to listen for

Purpose

Assess collaboration skills and teamwork experience.

Signals to score

  • Clear description of collaboration
  • Examples of teamwork
  • Successful project completion
  • Confidence in response
  • Mention of communication skills
  • Clarity in explanation
  • Learning outcomes

Follow-up questions

  • What was your role in the team?
  • How did you ensure effective communication?
  • What challenges did you face and how did you overcome them?

Closing

5 min
•

Do you have any questions for me about the team or the company?

What this question is for, and what to listen for

Purpose

Gauge the candidate’s curiosity and interest in the role.

Signals to score

  • Thoughtful questions asked
  • Interest in company culture
  • Curiosity about growth expressed
  • Questions about role raised
  • Inquiries about team challenges
  • Engagement with responses shown
  • Desire to learn next steps

Follow-up questions

  • What interests you most about this team?
  • Are there any areas of the role you’d like to explore further?
  • What are the next steps in the interview process?
•

Thank you for your time today. We’ll be in touch soon regarding the next steps.

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Interview Template
Position
Software Engineer
Round
Technical Interview for 60 min
Key skills
Programming Concepts, Technical Knowledge, Design Patterns, OOP Principles, Debugging

Software Engineer interviews — common questions

Who is this Software Engineer interview plan for?
It is written for the interviewer, not the candidate: the hiring manager, engineer or panel member running the Technical Interview round for a Software Engineer role. It gives you a 60 min script to follow in the conversation — 10 questions with what each one is for and the signals to score against — so you are not writing the round from scratch the night before.
What does the Technical Interview round assess?
This round is focused on: Programming Concepts, Technical Knowledge, Design Patterns, OOP Principles, Debugging. It works through Introduction, Programming Concepts and Technical Knowledge, Design Patterns and OOP Principles, Debugging and Problem-solving, Time Management, Task Ownership, and Collaboration Skills and Closing, scoring against 53 observable signals, with follow-up prompts on all 10 questions for going deeper where an answer is thin.
How is the 60 min split up?
Introduction (5 min), Programming Concepts and Technical Knowledge (15 min), Design Patterns and OOP Principles (15 min), Debugging and Problem-solving (15 min), Time Management, Task Ownership, and Collaboration Skills (10 min), Closing (5 min). The timings are there so the round stays on schedule and every candidate gets the same shape of interview — which is what makes two candidates comparable afterwards.
What other rounds should I run for a Software Engineer?

A single round does not cover a whole role. The other rounds in this library for a Software Engineer: