Coinbase security engineer interviews cover threat modelling, secure architecture design, vulnerability assessment, cryptography fundamentals, and incident response.
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coding
Medium
Verified Question
#1
1. Generate NFT
Category: String coding problem# Question You are designing an NFT generation engine. You are given a set of Traits, where each trait has a name and a list of possible...Input: List
Output: Array
coding
Medium
Verified Question
#2
2. Blockchain Mining
Category: Dynamic programming coding problem# Question You are building a block construction module for a blockchain node. The goal is to select a subset of pending transactions to include in...Input: Graph (nodes and edges)
Output: Computed result
coding
Medium
Verified Question
#3
3. Crypto Trading System Stream
Category: String coding problem# Question Design a crypto trading system that manages a stream of orders. The system should support various operations like placing, pausing,...Input: Array of strings
Output: Computed result
coding
Hard
Verified Question
#4
4. Design Iterators
Category: Array coding problem# Question For this problem, you will be designing a series of different iterator classes. This problem is split into multiple related parts that...Input: Array of integers
Output: Computed result
coding
Medium
Verified Question
#5
5. Food Delivery System
Category: Trie-based coding problem# Question For this problem, you will be designing a food delivery system. This problem is split into three related parts, evolving from basic data...Input: List
Output: Computed result
coding
Hard
Verified Question
#6
6. Transaction System
Category: Tree coding problemFor this problem, you will be designing a system to handle financial transactions and account balances. This problem is split into three related...Input: List
Output: Integer
coding
Hard
Verified Question
#7
7. OA[CodeSignal] Cloud File Storage System
Category: Graph coding problem# Question Your task is to implement a simple in-memory cloud storage system that maps objects (files) to their metadata (name, size, etc.). You...Input: Graph (nodes and edges)
Output: Array
coding
Hard
Verified Question
#8
8. OA[CodeSignal] Design Banking System
Category: Graph coding problem# Question Design a banking system that supports account management, transactions, and various financial operations.Input: Graph (nodes and edges)
Output: Computed result
coding
Hard
Verified Question
#9
9. Capital Gains Tax Calculator
Category: String coding problemYou are given a chronologically sorted list of stock transactions. Each transaction is a list of strings in the format `[<timestamp>, <type>,...Input: Array of strings
Output: Computed result
coding
Medium
Verified Question
#10
10. Service Log Aggregator
Category: Trie-based coding problemA distributed system emits log entries from multiple services and worker threads. Each log entry is a colon-separated string in the format...Input: Array
Output: Computed result
coding
Hard
Verified Question
#11
11. OA [CodeSignal] Knowledge Base System
Category: Graph coding problemDesign and implement a personal knowledge base called
KnowledgeBaseSystem that stores articles with CRUD operations. The system operates entirely...Input: Graph (nodes and edges)Output: Computed result
coding
Medium
Verified Question
#12
12. OA [CodeSignal] Workspace Tracker
Category: Interval-based coding problemBuild a system to track desk workers at a shared office space. The system records when each worker enters and leaves and computes how long they have...Input: String
Output: Array
coding
Hard
Verified Question
#13
13. Transaction Query Engine
Category: String coding problemDesign a system to filter and paginate a list of transaction records. Each record is a list of strings in the format `[timestamp, id, userId,...Input: Array of strings
Output: Computed result
coding
Medium
Verified Question
#14
14. Exchange Rate Finder
Category: String coding problemYou are given a set of currency exchange relationships. Each relationship specifies a direct exchange rate between two currencies. Rates are...Input: List
Output: Computed result
coding
Hard
Verified Question
#15
15. Order Matching Engine
Category: String coding problemYou are managing a cryptocurrency order book. The book holds buy and sell orders placed by traders. - A buy order indicates the maximum price a...Input: String
Output: Computed result
coding
Hard
Verified Question
#16
16. Account Transfer System
Category: String coding problemYou are given a list of fund transfer instructions and a set of accounts with initial balances. Each transfer moves a fixed percentage of the...Input: List
Output: Computed result
coding
Hard
Verified Question
#17
17. Restaurant Delivery Network
Category: String coding problemYou are building a food discovery platform. Given a user's location, a list of restaurants with their coordinates, and a menu of items with prices,...Input: List
Output: Computed result
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