DoorDash interview questions

Design Instagram

Photo delivery and social feeds: safe publication, celebrity fan-out, stable pagination, and high-volume interactions.

Companies: DoorDash, Amazon, Bloomberg, Datadog +9

content-delivery · feed-fanout · idempotency · media-storage

Last reported Sep 2026

Tell me about a time you had to deal with underperformance

Companies: DoorDash, Expedia, GitHub, Google +5

Last reported Aug 2026

Why are you looking for a new opportunity now?

Companies: DoorDash, Amazon, Clickhouse

Last reported Aug 2026

Design a Review and Reward System for Food Delivery

Design a system that allows food delivery consumers to add reviews on ordered food items and earn monetary rewards based on the quality of their…

Companies: DoorDash, LinkedIn

Last reported Jul 2026

Round Robin Scheduling

Review the implementation of a round robin scheduling algorithm that distributes tasks or requests evenly across a set of available resources. Evaluate the code for…

Companies: DoorDash

Last reported Jul 2026

Tell me about a time you made a mistake and how you handled it

Companies: DoorDash, Bloomberg, Revolut, Roblox

Last reported Jul 2026

Tell me about a project where the requirements were not clear or kept changing. How did you adapt and maintain productivity?

Companies: DoorDash, Amazon, Apple, Bloomberg +11

Last reported Jun 2026

Describe your most impactful project

Companies: DoorDash, Airbnb, Amazon, Anduril +22

Project Deep Dive

Last reported Jun 2026

Tell me about a time when you had a conflict with your manager and you were wrong

Companies: DoorDash, Coupang, Google, Meta +1

Last reported Jun 2026

Describe a production incident you handled, including how you diagnosed the issue, mitigated the impact, communicated with stakeholders, and prevented recurrence.

Companies: DoorDash, CrowdStrike, LinkedIn, Stubhub

Last reported Jun 2026

Shortest Distance from All Buildings

Given a grid with buildings (1), empty land (0), and obstacles (2), find an empty cell that minimizes the sum of shortest (Manhattan) path distances…

Companies: DoorDash, Amazon, Coupang, Goldman Sachs +2

Array · Breadth-First Search · Matrix

Last reported May 2026

Multi-Source BFS

Implement a breadth-first search algorithm that starts simultaneously from multiple source nodes in a graph. Return the shortest distances from any source node to all…

Companies: DoorDash

Last reported Apr 2026

Describe a time when you had to coach someone

Companies: DoorDash, Amazon, Etsy, Expedia +2

Last reported Apr 2026

Design a devbox system

Design a cloud-based development environment system that allows developers to create, configure, and manage isolated development containers with pre-installed tools and…

Companies: DoorDash, OpenAI

Last reported Apr 2026

Design a social story sharing feature for a food delivery app with in-app purchasing

Design an Instagram-like feature for a food delivery app where users can post stories about foods they love, follow other users, and purchase featured foods…

Companies: DoorDash

Last reported Apr 2026

Design a Duplicate File Finder

Design a system that can identify and deduplicate millions of files across a large-scale file system, allowing users to detect redundant files and reclaim storage…

Companies: DoorDash

Last reported Mar 2026

How did you overcome a situation where you have been given a negative feedback?

Companies: DoorDash, Amazon, Anduril, Meta +5

Last reported Mar 2026

Making A Large Island

Given an n×n binary grid where you can flip at most one 0 to 1, compute the largest possible 4-directional island size after the flip…

Companies: DoorDash, Meta, TikTok, Uber

Array · Breadth-First Search · Depth-First Search · Matrix

Last reported Mar 2026

Tell me about a time when you received constructive feedback and how you responded to it

Companies: DoorDash, Amazon, Anduril, Checkout +4

Last reported Mar 2026

Tell me about a conflict you had at work.

The interviewer focused on a conflict that comes from different perspectives or ideas on how to execute a certain task.

Companies: DoorDash, Adyen, Amazon, Capital One +18

Last reported Mar 2026

Design a Scheduler System

Design a system that allows users to schedule events and processes them at specified times. Focus on the event staging architecture, including how events are…

Companies: DoorDash, Anyscale, Apple, Cursor +2

Last reported Mar 2026

Find the Closest Marked Node

Given an undirected tree (or graph) where nodes can be toggled "marked," support operations that mark/unmark nodes and queries that ask for the shortest distance…

Companies: DoorDash

Last reported Mar 2026