Stripe
Payments infrastructure with sophisticated fraud detection and data systems.
4 Rounds
~21 Days
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
Full Stack Engineer
•
Coding
•
medium
Write a function to parse raw HTTP headers from a string into a structured key-value map, handling edge cases like multi-line headers and malformed inputs.
#String Manipulation
#Parsing
#HTTP
Full Stack Engineer
•
Coding
•
medium
Implement a rate limiter using a token bucket algorithm. The function should take a user ID and return a boolean indicating whether the request is allowed.
#Data Structures
#Concurrency
#API Design
Full Stack Engineer
•
Coding
•
medium
Implement an exponential backoff retry mechanism for a failing API call. It should accept a maximum number of retries and a base delay.
#Asynchronous Programming
#Error Handling
#Networking
Full Stack Engineer
•
Coding
•
medium
Create a generic JSON deep-diff function to compare two API request payloads and return an object representing the differences.
#Recursion
#Data Structures
#JSON
Full Stack Engineer
•
Coding
•
hard
Write a function to evaluate a simple abstract syntax tree (AST) representing custom merchant fraud rules (e.g., `amount > 100 AND country == 'US'`).
#Trees
#Parsing
#Recursion
Full Stack Engineer
•
Coding
•
hard
Implement an in-memory key-value store that supports transactions with BEGIN, COMMIT, and ROLLBACK operations.
#Data Structures
#State Management
#Design Patterns
Full Stack Engineer
•
Coding
•
easy
Given a list of raw server logs as strings, write a script to parse them and find the top 3 IP addresses that generated the most 5xx HTTP errors.
#String Manipulation
#Hash Maps
#Sorting
Full Stack Engineer
•
Coding
•
medium
Implement a function that takes an array of overlapping time intervals (representing server downtimes) and merges them into contiguous blocks.
#Sorting
#Arrays
#Logic
Full Stack Engineer
•
Coding
•
medium
Write a load balancer algorithm that distributes incoming requests to a list of servers based on their current active connection count (Least Connections).
#Heaps
#System Design
#Data Structures
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.