Question 1

Walk me through your most recent project.

Accepted Answer

Communication test. Two minutes max — user problem, your role, the choice you are most proud of, the metric that improved.

Question 2

Explain the difference between let, const, and var.

Accepted Answer

Tests whether you can talk through hoisting and the temporal dead zone in your second language without losing your train of thought.

Question 3

What is the event loop, and why does Promise.resolve().then(...) fire before setTimeout(0)?

Accepted Answer

Almost guaranteed in senior interviews. Strong answers cover call stack, macrotask queue, microtask queue.

Question 4

What does useEffect with an empty dependency array do, and when would you use it?

Accepted Answer

Unavoidable on any React stack. Bonus points for cleanup function, StrictMode double-execution, and why fetching in useEffect is increasingly being replaced.

Question 5

Walk me through what happens when a user types a URL into the browser.

Accepted Answer

The classic. Cover DNS, TCP, TLS, HTTP, parsing, CSSOM, render tree, layout, paint, composite. Do not skip TLS.

Question 6

Build a typeahead search component with debounced input.

Accepted Answer

Tests debounce, controlled inputs, handling stale responses (the seventh keystroke comes back before the eighth — most miss this), accessibility.

Question 7

Implement a function that flattens an arbitrarily nested array.

Accepted Answer

Tests recursion vs iteration, edge-case handling for non-array values.

Question 8

Design the frontend architecture for a Telegram-style messenger.

Accepted Answer

Real-time updates (WebSocket vs SSE), offline state, message ordering, what to render on the server vs client.

Question 9

Tell me about a time you disagreed with a teammate about a technical decision.

Accepted Answer

Use situation-task-action-result. Pick a story where you were right but not righteous, or where you were wrong and learned something specific.

Question 10

Tell me about a time something you shipped broke in production.

Accepted Answer

Wrong answer: "nothing I shipped has ever broken." Right answer: 90-second story with specific numbers and a concrete change you made afterwards.

Frontend Developer Interview Prep — for engineers in Tashkent and Central Asia

Core skills tested

Salary ranges in Tashkent (2026)

What you will actually be asked

Walk me through your most recent project.

Explain the difference between let, const, and var.

What is the event loop, and why does Promise.resolve().then(...) fire before setTimeout(0)?

What does useEffect with an empty dependency array do, and when would you use it?

Walk me through what happens when a user types a URL into the browser.

Build a typeahead search component with debounced input.

Implement a function that flattens an arbitrarily nested array.

Design the frontend architecture for a Telegram-style messenger.

Tell me about a time you disagreed with a teammate about a technical decision.

Tell me about a time something you shipped broke in production.

Practice these questions out loud — for free

Core skills tested

Salary ranges in Tashkent (2026)

What you will actually be asked

Walk me through your most recent project.

Explain the difference between let, const, and var.

What is the event loop, and why does Promise.resolve().then(...) fire before setTimeout(0)?

What does useEffect with an empty dependency array do, and when would you use it?

Walk me through what happens when a user types a URL into the browser.

Build a typeahead search component with debounced input.

Implement a function that flattens an arbitrarily nested array.

Design the frontend architecture for a Telegram-style messenger.

Tell me about a time you disagreed with a teammate about a technical decision.

Tell me about a time something you shipped broke in production.

Practice these questions out loud — for free

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