Software Engineer System Design Interview Questions
Practice 904 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 an Online Game Leaderboard
Question Design the backend system for an online game's leaderboard. The system should support: 1. Recording and updating player scores from game sess...
Design a durable key-value store
System Design: Durable Key–Value Store Design a single-node, embeddable key–value store library with a simple API that must remain correct and durable...
Design a compliant multi-tenant analytics platform
Prompt Design a multi-tenant data analysis platform for government and enterprise customers. The interviewer emphasizes that the key challenge is not ...
Design product catalog service
Question Design a product catalog service for a large e-commerce / grocery platform. The catalog must support a hierarchical category tree implemented...
Design centralized log ingestion and query system
Problem Design a system to collect, transmit, store, and query application/data logs from many services/hosts into a central data center database. Req...
Design authorization and audit logging systems
Scenario You are building security infrastructure for internal services at a fintech company. Two key components are needed: Part A — Internal authori...
Design mobile check deposit system
System Design: Mobile Check Deposit for a Consumer Banking App Design a production-grade Remote Deposit Capture (RDC) feature that lets retail custome...
Design a GPU-aware pod scheduler
GPU-Aware Pod Scheduler and Cluster Manager (OO Design) Context You are designing a simplified, object-oriented cluster manager with a GPU-aware pod s...
How to host many domains on one IP?
You have a single Linux server with one public IPv4 address. A coffee shop, butcher shop, and auto repair shop each want their own website and their o...
Design a superhero incident dispatch system
System Design: Superhero Dispatch (Uber-like) System Design a system that dispatches superheroes to real-world incidents (e.g., fires, robberies, mons...
Design a news aggregator like Google News
Scenario Design a News Aggregator Service similar to Google News. The system aggregates articles from many publishers and shows users: - Top Stories (...
Design in-memory database API
Design an In-Memory Database: Insert, Query, and Indexing Design and implement a minimal, single-process, in-memory database intended to be embedded i...
Design in-memory DB with TTL and history
In-Memory Database: Progressive Design in 4 Levels You are designing a simplified in-memory database to be implemented in four progressive levels. Eac...
Explain Kubernetes autoscaling and traffic routing
In Kubernetes: 1) How does autoscaling work (pod and node scaling)? 2) How is traffic routed from outside the cluster to the right Pods? 3) What are t...
Design real-time crypto prices homepage
Design a system that powers a “crypto explore/home” page (like an exchange’s market page) that: - Shows a list of crypto assets (e.g., BTC, ETH, SOL, ...
Design a scalable search service with sharding
Technical Design: Search + Sharding Trade-offs Design a search service that lets users query documents/products with keywords. Functional requirements...
Design a bidirectional data sync dashboard
Design a bidirectional data synchronization platform and an internal dashboard. Scenario Your company integrates with multiple cloud providers (e.g., ...
Design a temporary email service
Design a Disposable Email Service with Auto-Expiring Addresses Design a receive-only disposable email service (e.g., 10‑minute inboxes) that issues au...
Design Points-from-Transactions Service
Design a Scalable Loyalty Points Service (USD → Points at 1 USD = 1.5 Points) You are designing a service that awards loyalty points for purchase tran...
Design a scalable notification system
Problem Design a notification system for a company at Airbnb-like scale that can send notifications to different user types (e.g., customers/guests, h...