Hiring a Full Stack Developer? Post the opening free on Klyver.
Post an openingWarm-up
- Tell me about a project where you worked on both frontend and backend.
- Which stack do you prefer when you get to choose?
Process and technique
- Walk me through how you would design the architecture of a new feature end to end.
- How do you decide when to optimise the performance of a database query?
- Describe your code-review process: what do you look for when reviewing someone else's code?
- How do you handle a critical production incident while the team is asleep?
Behaviour
- Tell me about a technical disagreement with another developer. How was it resolved?
- How do you handle deadline pressure when you know the code needs more time?
Case study
- The system starts failing under load at peak hours. How do you diagnose the cause?
- You inherit a codebase with no documentation and no tests. Where do you start?
A question that actually screens candidates
An endpoint takes 6 seconds in production and one component re-renders too often. Where do you start measuring?
What you want to hear: Measures before changing (traces, slow query, browser profiler) and separates the data problem from the UI one.
What rules them out: Jumps to rewriting or "adding a cache" without having measured anything.
Example scorecard
| Criterion | 1 (weak) | 3 (meets) | 5 (strong) |
|---|---|---|---|
| Backend depth | Basic CRUD only | Designs APIs and queries | Diagnoses and optimizes in production |
| Frontend and user experience | Markup only | Maintainable components | Cares about performance and accessibility |
| Databases and design | Simple queries | Models and uses indexes | Makes trade-offs with data |
| Communication and teamwork | Tickets only | Explains decisions | Aligns with product and other teams |
Score each criterion from 1 to 5 right after the interview, before comparing notes with the rest of the team.
Salary reference: published averages run from $16,507 to $18,803 a month in Mexico (checked Sep 20, 2026). See sources and ranges.
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Feature: AI Candidate Brief (generates the interview guide) →Job description: Full Stack Developer →