DoorDash Software Engineer System Design Interview Questions
Practice 38 real System Design interview questions for Software Engineer roles at DoorDash.
"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"
"Believe me i'm a student here jn US. Recently interviewed for MSFT. They asked me exact question from PracHub. I saw it the night before and ignored it cause why waste time on random sites. I legit wanna go back and redo this whole thing if I had chance. Not saying will work for everyone but there is certainly some merit to that website. And i'm gonna use it in future prep from now on like lc tagged"
"10 years of experience but never worked at a top company. PracHub's senior-level questions helped me break into FAANG at 35. Age is just a number."
"I was skeptical about the 'real questions' claim, so I put it to the test. I searched for the exact question I got grilled on at my last Meta onsite... and it was right there. Word for word."
"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."
"I've used LC, Glassdoor, and random Discords. Nothing comes close to the accuracy here. The questions are actually current — that's what got me. Felt like I had a cheat sheet during the interview."
"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."
"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."
"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."
"Literally just signed a $600k offer. I only had 2 weeks to prep, so I focused entirely on the company-tagged lists here. If you're targeting L5+, don't overthink it."
"Coaches and bootcamp prep courses cost around $200-300 but PracHub Premium is actually less than a Netflix subscription. And it landed me a $178K offer."
"I honestly don't know how you guys gather so many real interview questions. It's almost scary. I walked into my Amazon loop and recognized 3 out of 4 problems from your database."
"Discovered PracHub 10 days before my interview. By day 5, I stopped being nervous. By interview day, I was actually excited to show what I knew."
"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."
"The search is what sold me. I typed in a really niche DP problem I got asked last year and it actually came up, full breakdown and everything. These guys are clearly updating it constantly."
Design an Alert Notification Service for Downstream Consumers
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Design a Food Review and Voting System
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Design a Refund Workflow as a Directed Acyclic Graph
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Design a 3-day donation platform
Design: Online Donation Platform for 3-Day Campaigns Context Design an online donation platform optimized for short, 3-day fundraising campaigns. Each...
Design a resilient dasher payment system
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Design a Sliding-Hour Top-Restaurants Service
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Design a Food Review Platform
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Design an alert notification system
Design a multi-tenant alert notification system for operational incidents. Monitoring sources send events when checks fire or recover. Users can confi...
Design a Customer Review Page
This question evaluates skills in system architecture, data modeling, API design, storage and search solutions, media handling, ranking, pagination, c...
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Debug round-robin request router Round-Robin Request Router with Health and Dynamic Membership You are given a list of backend servers and an incoming...
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Design the backend for a food-delivery product (think DoorDash-style marketplace). The system has two distinct surfaces that you must address together...
Design review system with voting and rewards
Design a Scalable Product Review System with Voting and Rewards You are designing a reviews feature for a large e-commerce marketplace. Customers can ...
Design a notification system
System Design: Multi-Channel Notification Platform Context Design a multi-tenant notification platform that delivers messages across email, SMS, and m...
Design a donations service with 3-day rolling totals
Design a service that ingests donations and serves rolling 3-day donation totals. Requirements Core features 1. Ingest donation events: - Each dona...
Design consistent hashing for sharding
Design a Consistent-Hashing Router with Replication You are building a stateless router that maps arbitrary keys (for example, request IDs or cache ke...
Design a distributed cron job scheduler
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