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Full Stack Developer interview questionsCoding Test round
A 60 min interview plan with a time-boxed script, what each question is for, and the signals to score against. Key skills: Coding, Frontend & Backend, JavaScript, Server-side Languages, Frameworks.
Opening
· 5 minWho is interviewing, how the round will run, and a question to settle the candidate in. The standard openingCoding Challenge
What this part is for
Purpose
Evaluate technical knowledge and problem-solving skills in real-world scenarios.
Build a simple RESTful API using Node.js and Express that performs CRUD operations on a 'Product' resource. The 'Product' should have fields: id, name, description, and price. Follow-Up Questions: - How would you handle errors in your API? - How would you secure your API? - How would you test your API?
What this question is for, and what to listen for
Purpose
Assess problem-solving, coding proficiency, and understanding of backend development.
Signals to score
- Clear understanding of RESTful API concepts
- Logical and structured approach
- Explains thought process
- Considers edge cases
- Efficient, clean, well-formatted code
- Tests and debugs the code effectively
- Open to feedback and adjusts accordingly
Follow-up questions
- Can you explain your thought process on how to approach building the API?
- How do you plan to handle edge cases in your API?
- Can you walk me through your code and explain each step?
If you had more time, what would you change in your solution?
What this question is for, and what to listen for
Purpose
Assess the candidate's ability to reflect on their work, identify areas for improvement, and demonstrate critical thinking and problem-solving skills.
Signals to score
- Recognizes limits in their original answer.
- Points out clear areas to improve.
- Suggests specific changes.
- Talks about how changes could help performance.
- Shares ideas clearly and logically.
- Shows a desire to learn and improve.
Follow-up questions
- What additional features would you add to enhance the API?
- How would you improve the performance of your solution?
Great job on the coding exercise!
What this line is for
Purpose
Provides positive reinforcement to the candidate, helping to build confidence and create a supportive atmosphere before moving into the final part of the interview.
Closing
· 5 minTheir questions for you, and what happens next. The standard closingFull Stack Developer interviews — common questions
- Who is this Full Stack Developer interview plan for?
- It is written for the interviewer, not the candidate: the hiring manager, engineer or panel member running the Coding Test round for a Full Stack Developer role. It gives you a 60 min script to follow in the conversation — 2 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 Coding Test round assess?
- This round is focused on: Coding, Frontend & Backend, JavaScript, Server-side Languages, Frameworks. It works through Coding Challenge, scoring against 13 observable signals, with follow-up prompts on both questions for going deeper where an answer is thin.
- How is the 60 min split up?
- 5 min opening, 50 min on 2 questions and 5 min closing. The questions take in Coding Challenge (50 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 Full Stack Developer?
A single round does not cover a whole role. The other rounds in this library for a Full Stack Developer:
Hiring for this role?
Open this plan in Hirezen and make it a position in one click.
- Every interviewer runs the same script and marks the same signals.
- AI drafts the write-ups, and the debrief puts every read side by side.
- No ATS to set up first, and no bot in the call.
Free for your first open role.