Software Engineer System Design Interview Questions
Practice 1,082 real System Design interview questions for Software Engineer roles. From companies including Meta, OpenAI, Amazon, Anthropic, Google.
"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 real-time delivery tracking with async updates
This question evaluates designing scalable, fault-tolerant real-time delivery tracking systems, focusing on asynchronous event processing, out-of-orde...
Design a Moderated Messaging Service
This question evaluates system design competency, covering scalable distributed architecture, data modeling, API design, integration with external mod...
Design ticketing and coding practice platforms
You are asked two separate system design questions. --- 1. Design an online event ticketing platform (like Ticketmaster) Design a large-scale web serv...
Design a real-time ad impression aggregator
Design an ads impression aggregator service with the following requirements: - The system ingests a high-volume stream of impression events (each even...
Design a streaming video platform MVP (Netflix-like)
Question Design a Netflix-like streaming video platform MVP that supports three main customer use cases: 1. Browse Catalog — users browse TV shows and...
Design crawler storing only image URLs
System Design: Image-URL Crawler (URLs only, no HTML storage) Context Design a production web crawler that fetches HTML pages and extracts only image ...
Design a global multi-game leaderboard
Design a Global, Multi‑Game Leaderboard (Ladder) Service You are designing a global leaderboard platform used by many different games and modes. Each ...
Design donation database and failure handling
System Design: Donations Platform with One-Time and Recurring Payments Context Design a backend for a donations platform that supports campaigns, one-...
Design secure Kubernetes with CI/CD
Kubernetes Architecture, Troubleshooting, Security, and CI/CD (GKE/EKS) Context: You are the on-call software engineer for a managed Kubernetes cluste...
Design input validation and error handling
Design Task: API, Validation, and Error Handling for a Top-K Frequency Service Context Design a production-grade service that, given an array of eleme...
Design a reusable React comment component
Design and Implement a Reusable Comment Input-and-Feed Component in React Goal Build a reusable React component that provides a comment input and feed...
Explain database transactions and ACID
Database Transactions and ACID under Concurrency Prompt You are working with a relational database that supports transactions and multiple isolation l...
Design product co-occurrence analytics API
Design RESTful APIs for Co‑Purchase Analytics Context You are designing backend APIs to power a "related products" module based on co‑purchase behavio...
Handle invalid input at system level
Design: Validation and Error Handling for a Top-K Frequency API Context You are designing a REST endpoint that computes the top-K most frequent values...
Compare core system design tradeoffs with scenarios
System Design Tradeoffs for a Web-Scale Service Context You are designing a web-scale, user-facing transactional service. Compare key architectural ch...
Schedule and execute future payments
Schedule and execute future payments System Design: Scheduled Payments Execution Context You are building a balance-transfer service (e.g., an interna...
Implement paginated, sortable dynamic table component
Implement paginated, sortable dynamic table component React Table Component: Pagination, Sorting, Dynamic Columns Context You are building a reusable ...
Market a new AI technique
Market a new AI technique Context You are a software engineer introducing a new technique and planning a public blog post to drive developer adoption....
Design a weather aggregation system
Design a weather aggregation system System Design: Weather Data Aggregation (10-minute Updates) Context Build a service that periodically fetches weat...
Compare cloud compute; design Kubernetes security and CI/CD
Compare cloud compute; design Kubernetes security and CI/CD Cloud Compute Models, Testing Strategies, Kubernetes Deep Dive, Security, and CI/CD to GKE...