Full-stack developer interview practice

A full-stack interview checks breadth without letting you hide behind it. You are expected to move between the UI, the API and the database in one conversation, and to say which side of the line you are strongest on.

What do full-stack developer interviews ask?

Full-stack interviews ask for breadth: a front-end question, a back-end or database question, a small end-to-end design such as a booking or chat feature, and usually a coding round. Interviewers watch how you connect the layers and whether you can explain trade-offs between them.

Practise a full-stack interview

End-to-end questions

A typical prompt is a small feature: a comment system, a booking flow, a dashboard. You are asked to sketch the data, the endpoints, the client state and how errors and loading appear to the user. The signal is whether the pieces fit: the API returns what the UI needs, and the database supports the queries the API makes.

Depth on one side

Most loops probe one side deeply, based on your resume. Know your own projects end to end: why this schema, how authentication worked, what you would change. If you list a framework, expect questions on how it works underneath.

Coding and fundamentals

Coding rounds are usually standard data structures and algorithms in JavaScript, TypeScript, Python or Java. Practise those language pages for their traps, and rehearse explaining a past project in under two minutes for the voice screen.

Practising here

The platform's role loops run a voice screen, a coding round and often a design round, which is the sequence full-stack candidates face. Your first 3 single-question interviews are free for life, every interview report is free, and a new account also gets 6 welcome credits.

Frequently asked questions

Do I need to be equally strong in front-end and back-end?

No. Most interviewers expect a stronger side and working knowledge of the other. Say which is which.

Are algorithm questions common for full-stack roles?

Yes at many companies, usually at easy to medium level.

How do I show breadth without sounding shallow?

Pick concrete examples from your own projects and go one level deeper than the interviewer's first question.