Frontend Architecture (High-level)
Notes:
- Keep the client thin.
- Move complex logic to the edge or BFF.
- Design for latency, failure, and scale.
Discuss trade-offs at each layer. ↗
Build clarity.
Show reasoning.
Interview field notes
Practise system design, machine coding, and AI interface rounds with realistic questions and clear trade-offs.
↗ Start with a real interview flow.
Notes:
Discuss trade-offs at each layer. ↗
Implement a debounced search input with cancellation.
1function useDebouncedValue<T>(2 value: T,3 delay: number4): T {5 // your implementation6}Strong answers balance depth with clarity.
Design frontend systems end-to-end. Make architecture choices and defend them with trade-offs.
Write clean, correct, and efficient code. Handle edge cases and communicate as you code.
Design human–AI experiences that are useful, trustworthy, and a pleasure to use.
Hands-on machine coding, mentor-tone guides on streaming and agents, and a 32-term glossary — built for interviews at OpenAI, Anthropic, Cursor, Perplexity, and the companies copying their playbook.
Every question gives you a short 2-3 sentence answer to say in the interview, key trade-offs, and the underlying reason interviewers probe it.
Every question comes with a working solution, a step-by-step explanation, interviewer grading criteria, and time checkpoints. Write React or vanilla JavaScript and see the result instantly.
Every question is broken down with the same step-by-step framework, from requirements to a complete architecture. Then go deeper: monorepos, microfrontends, real-time transports, future-proof components.
Every question has a working solution and a step-by-step explanation. Run your code in the browser and check it against the solution.
Mentor-tone lessons — scene, naive move, where it breaks, fix — so you can teach the pattern before the product question.
Interactive practice
Run frontend interview exercises with an editor and test suite. The playground loads as you approach this section so it does not delay the page's main content.