Coinbase Software Engineer Coding & Algorithms Interview Questions
Practice 39 real Coding & Algorithms interview questions for Software Engineer roles at Coinbase.
"I got asked a hardcore MCM DP question and I saw it on PracHub as well. Solved that question in 5 minutes. Without PracHub I doubt I could solve it in 5 hours. Though somehow didn't get hired, perhaps I guess I solved it too fast? /s"
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Implement custom iterator classes
Implement custom iterator classes In a blank coding environment (no IDE assistance, no autocomplete), implement an iterator abstraction entirely from ...
Parse logs and generate NFT attributes
This question evaluates parsing and log-processing skills alongside combinatorics and weighted-sampling competency, covering extraction and time-based...
Analyze food-delivery data
Analyze food-delivery data You are given data for a food-delivery platform: a set of restaurants (each with a menu of items and prices, plus a geograp...
Implement a Coin-Constrained Jump Strategy
This question evaluates a candidate's ability to design a stateful decision-making strategy combining physics-based motion reasoning, resource-constra...
Implement Composable Range Iterators
Implement an iterator library: range(start, end, step= 1) supporting forward/backward iteration, inclusive/exclusive endpoints, negative steps, and ov...
Implement custom iterators and interfaces
Implement custom iterators and interfaces Define a minimal Iterator interface (e.g., hasNext(), next()) for integers without using IDE-generated scaff...
Compute Total Manual Distance
This question evaluates array processing, state simulation, and algorithmic reasoning for deterministic stepwise processes, including handling unsorte...
Implement iterators and write tests in Java
Implement iterators and write tests in Java In Java, write everything from scratch (no IDE scaffolding): 1) Define a generic Iterator<T> interface wit...
Compute top-K branches by openings
Compute top-K branches by openings Given a stream of account-opening events (branch_id, user_id, timestamp), design algorithms and data structures to ...
Implement a crypto order management system
You are building an in-memory crypto order management system. You must parse commands from standard input and print outputs for query commands. Order ...
Generate constrained NFT metadata
Generate constrained NFT metadata Given a set of trait types (e.g., background, eyes, hat), each with a list of allowed values, and a target count N, ...
Design order stream with state transitions
Design order stream with state transitions Implement an in-memory order stream service with operations: add(order), delete(order_id), pause(order_id),...
Implement a Flappy Bird Jump Agent
This question evaluates discrete-time physics simulation, real-time decision-making under constraints, collision detection, and deterministic control-...
Design crypto trading order control API
You are implementing part of a simple crypto trading system that manages client orders. Each order can be in one of several states: NEW, ACTIVE, PAUSE...
Generate NFT metadata and ensure uniqueness
You are implementing an NFT metadata generator. Each NFT is defined by selecting exactly one trait value from each trait category. You must generate a...
Select transactions to maximize fees under size
This question evaluates the ability to model and optimize resource allocation under capacity constraints, testing algorithmic skills in dynamic progra...
Implement banking, knapsack, and pagination tasks
This multi-part question evaluates stateful system design, ordered event processing and scheduling semantics for an in-memory banking command processo...
Implement cursor-based query pagination
You are building a small in-memory database that stores rows with the following fields: - id (string, unique) - score (integer) - payload (string) You...
Maximize profit with transaction fee
Maximize profit with transaction fee Given an array of daily stock prices and a fixed transaction fee charged on each sell, compute the maximum profit...
Compute prices, distances, and Top-K for orders
Compute prices, distances, and Top-K for orders Build functions for a food‑delivery analytics module. Data: - Restaurants: id, (x, y) location, menu m...