25 Full-Stack Engineer Interview Questions
Assess end-to-end ownership, from user interface to database, plus judgement on trade-offs and delivery for full-stack engineer candidates.
Full-Stack Engineer Interview Questions
25 total- 1
Describe a feature you built end to end, from the database table to the screen. Where did you spend most of your time?
- 2
How do you decide which logic belongs in the browser and which belongs on the server?
- 3
You are building a signup flow. Walk me through the data model, the API, the validation and the UI states.
- 4
How do you keep validation consistent between the front end and the back end without duplicating everything?
- 5
What is your approach to sharing types or contracts between the client and the server?
- 6
How do you decide between a relational database and a document store for a new product?
- 7
Tell me about a time a front-end performance problem turned out to be a back-end problem, or the reverse.
- 8
How would you add a search box with filters to an existing list page, from the query to the interface?
- 9
How do you handle a long-running operation, such as generating a report, so the user is not left waiting on a frozen screen?
- 10
What do you consider when you choose between building an API endpoint per screen and a more general endpoint?
- 11
How do you manage sessions and logout across a web app and an API?
- 12
Describe how you would implement file upload for large files, including progress and failure handling.
- 13
How do you structure a project so that a small team can move quickly without creating a tangle?
- 14
When you are strong on one side of the stack, how do you keep the other side at a professional level?
- 15
How do you handle database migrations when the front end and back end deploy at different times?
- 16
What do you do when you join a codebase that mixes several styles and frameworks?
- 17
How would you choose between a server-rendered framework and a single-page app for a new product?
- 18
Describe how you would debug a bug that only appears for some users in production.
- 19
How do you decide what to test in a full-stack feature, and at which level?
- 20
Tell me about a time you had to choose speed over polish on a feature. How did you limit the damage?
- 21
How do you protect a web application against the most common attacks, on both the client and the server?
- 22
What would you consider before adding a new dependency to a project?
- 23
How do you work with a designer who hands you a design that is hard to build as drawn?
- 24
Walk me through how you would deploy a small full-stack application and make sure you know when it breaks.
- 25
How do you estimate a feature that touches the interface, the API and the database?
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