Stripe

Stripe

Payments infrastructure with sophisticated fraud detection and data systems.

4 Rounds ~21 Days Hard
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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

Software Engineer • Coding • medium

Write a function to parse an 'Accept-Language' HTTP header and return the preferred languages in order of weight.

#String Parsing #HTTP #Sorting
Practice
Software Engineer • Coding • medium

Implement a function to calculate the total cost of a Stripe subscription based on a tiered pricing model (e.g., first 100 units cost $10 each, next 100 cost $8 each).

#Math #Business Logic #Edge Cases
Practice
Software Engineer • Coding • hard

Implement an in-memory key-value store that supports nested transactions (BEGIN, COMMIT, ROLLBACK).

#Data Structures #State Management #Stack
Practice
Software Engineer • Coding • easy

Write a function to validate a credit card number using the Luhn algorithm.

#Math #String Manipulation
Practice
Software Engineer • Coding • medium

Given a log file of API requests with timestamps and latencies, write a parser to calculate the 95th and 99th percentile latencies.

#File I/O #Sorting #Statistics
Practice
Software Engineer • Coding • medium

Implement a function to merge overlapping time intervals. This is used to calculate the total downtime of a server given a list of outage periods.

#Arrays #Sorting #Intervals
Practice
Software Engineer • Coding • medium

Write a function to detect fraudulent transactions based on a simple velocity rule: if a user makes more than 5 transactions within 1 minute, flag the 6th as fraud.

#Sliding Window #Queues #Hash Maps
Practice
Software Engineer • Coding • medium

Write a script to parse a JSON file containing a list of API endpoints and their dependencies, and output a valid execution order (Topological Sort).

#Graphs #Topological Sort #JSON Parsing
Practice
Software Engineer • Coding • medium

Write a function that takes a string representing a mathematical expression (e.g., '3 + 5 * 2') and evaluates it, adhering to standard order of operations.

#Stacks #String Parsing #Math
Practice

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The "Standard" Interviewer

Senior Engineer

Focuses on core competencies, system constraints, and clear communication.

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Think Out Loud

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