OpenAI
Leading AI research laboratory developing state-of-the-art foundation models like GPT-4.
5 Rounds
~21 Days
Very Hard
The Interview Loop
Recruiter Screen (30 min)
Standard fit check, behavioral questions, and resume overview.
Technical Loop (3-4 Rounds)
Deep dive into domain knowledge, coding, and system design.
Interview Question Bank
Frontend Engineer
•
Coding
•
medium
Write a debounce function that includes an `immediate` flag, allowing the function to trigger immediately on the first call and then debounce subsequent calls.
#Closures
#Timers
#Higher-Order Functions
Frontend Engineer
•
Coding
•
medium
Implement a custom `Promise.allSettled` function from scratch.
#Promises
#Asynchronous JavaScript
#Error Handling
Frontend Engineer
•
Coding
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medium
Implement an Event Emitter class with `on`, `off`, `once`, and `emit` methods.
#Design Patterns
#Data Structures
#Context
Frontend Engineer
•
Coding
•
hard
Implement a basic reactive state system (similar to Vue or MobX) using JavaScript Proxies. When a property on the state object is accessed, register the current observer. When it is mutated, trigger the observers.
#Proxies
#Design Patterns
#Reactivity
Frontend Engineer
•
Technical
•
medium
Explain the JavaScript event loop, microtasks, and macrotasks. How does a heavy DOM update impact the event loop, and how can you mitigate it?
#Event Loop
#Performance
#Browser Architecture
Difficulty Radar
Based on recent AI-sourced data.
Meet Your Interviewers
The "Standard" Interviewer
Senior EngineerFocuses on core competencies, system constraints, and clear communication.
SimulateUnwritten Rules
Think Out Loud
Always explain your thought process before writing code or drawing architecture.