Stripe backend engineer interviews typically focus on APIs, databases, system design, concurrency, caching, and data structures.
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coding
Hard
Verified Question
#1
1. Filter Roles
Category: Tree coding problemYou are building a role-based access control (RBAC) system for a multi-tenant platform. The system manages user roles across a hierarchical account...Input: List
Output: Array
coding
Hard
Verified Question
#2
2. Rate Limiter
Category: Sliding window coding problemDesign a rate limiter that tracks API requests per client and enforces limits using a sliding time window. Your system must support: - hit(key,...Input: Given input
Output:** Computed result
coding
Medium
Verified Question
#3
3. Shipping Cost Calculator
Category: Algorithm coding problemYou are building a shipping cost calculator for an international e-commerce platform. The cost depends on the destination country and the product...Input: Integer(s)
Output: Computed result
coding
Medium
Verified Question
#4
4. Transaction Fee Calculator
Category: Trie-based coding problemYou are building a fee calculation system for a payment processing platform. Given transaction data as a CSV string, calculate fees based on payment...Input: String
Output: Computed result
coding
Medium
Verified Question
#5
5. Bitmap to Image Conversion
Category: Grid/matrix coding problemYou are designing a bitmap character rendering system. Given a lookup table mapping characters to 2D binary arrays, implement functionality to print,...Input: 2D grid
Output: Printed output
coding
Medium
Verified Question
#6
6. [Onsite Integration] Bike Map
Category: Trie-based coding problemYou are building a map visualization tool that generates static maps from location data. Implement a system that reads GPS coordinates, constructs...Input: Array
Output: Computed result
coding
Hard
Verified Question
#7
7. Email Subscriptions
Category: String coding problemDesign a subscription management system that tracks user subscriptions and sends automated emails at specific lifecycle events. Email Types: -...Input: List
Output: Computed result
coding
Hard
Verified Question
#8
8. [Bug Squash] Mako Template Engine
Category: Tree coding problemIn this bug squash round, you will find and fix errors in a Python template library. You will receive a link to a GitHub folder containing a version...Input: List
Output: Printed output
coding
Hard
Verified Question
#9
9. [Bug Squash] Moshi JSON Library
Category: String coding problemIn this bug squash round, you will find and fix mistakes in a Java library called Moshi. You will receive a link to a GitHub folder containing a...Input: String
Output: Computed result
coding
Hard
Verified Question
#10
10. Data Center Load Scorer
Category: Graph coding problemA data center operations team monitors server energy usage to optimize resource allocation. You receive a daily dataset of all incoming requests to...Input: Graph (nodes and edges)
Output: Array
coding
Medium
Verified Question
#11
11. Content Validation Pipeline
Category: String coding problemA platform ingests user-generated content records in a simplified CSV format. Before indexing or displaying any content, each record must pass a...Input: Array of strings
Output: Array
coding
Hard
Verified Question
#12
12. Wallet Transaction Ledger
Category: String coding problemA fintech platform processes streams of wallet transactions and needs to consolidate them into account summaries. Each transaction is logged as a...Input: List
Output: Computed result
coding
Hard
Verified Question
#13
13. Employee Record Matcher
Category: Array coding problemA data-quality team needs to detect duplicate or near-duplicate employee records in a large HR dataset. Each record is a row in a 2D string array...Input: Array
Output: Array
coding
Hard
Verified Question
#14
14. Candidate Tech Stack Filter
Category: String coding problemA hiring platform screens candidates by comparing their declared technology stack against a job's required skills. A candidate submits a...Input: Array of strings
Output: Array
coding
Hard
Verified Question
#15
15. Subscriber Notification Planner
Category: Trie-based coding problemA subscription service sends automated notifications to subscribers based on their subscription window. You are given a list of subscriber records...Input: List
Output: Array
coding
Medium
Verified Question
#16
16. Support Ticket Dispatcher
Category: Graph coding problemA customer support platform assigns incoming tickets to agents to keep workloads balanced. You are given a list of agent names and a list of tickets...Input: Graph (nodes and edges)
Output: Array
coding
Medium
Verified Question
#17
17. Order Payment Reconciler
Category: String coding problemA billing system needs to match incoming payments to open orders. Each payment arrives as a comma-separated string with three fields: a payment ID, a...Input: List
Output: Computed result
coding
Medium
Verified Question
#18
18. Service Usage Cost Calculator
Category: Array coding problemA cloud billing module computes the total cost for a customer's monthly usage. You are given a
usage_report specifying the target region and...Input: ArrayOutput: Computed result
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