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 a News Feed and Mail Service
Design the following systems: 1. Aggregate news feed Build a service that ingests articles from many publishers, deduplicates and ranks them, and s...
Design Collaborative Document Editing
This question evaluates system design and real-time collaboration competencies, including architectural scalability, low-latency synchronization, cons...
Design a low-latency trading system
System Design: Low-Latency Electronic Trading Platform (Equities) You are designing a single-region electronic trading platform (exchange/ATS-like) th...
Design stock price time-series store and query
This question evaluates system design skills for time-series data storage and querying, covering scalability, partitioning, indexing, event-time handl...
Design a coffee ordering system
System Design: Coffee Ordering System Design a system for a coffee shop (and later a chain of stores) that lets customers order drinks for pickup or i...
Design a RAG question-answering system
This question evaluates system design and machine-learning engineering competencies for building Retrieval-Augmented Generation (RAG) systems, includi...
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 a One-to-One Chat System
Design a One-to-One Chat System The source identifies a one-to-one chat system as the design topic without specifying scale or product behavior. For t...
Design GPU credit allocator
Design a GPU Credit Allocation System Design a GPU credit allocation system for a multi-tenant compute platform (for example, OpenAI's GPU infrastruct...
Design an airline booking system
System Design: Airline Booking System Design an airline booking platform that lets travelers search for flights, book them, select seats, and modify o...
Design CI/CD Build Caching
This question evaluates design skills around CI/CD build caching, including distinguishing cache types (dependency caches, compiler outputs, container...
Design a scalable interview question bank
Design a scalable interview question bank System Design: Scalable Interview Question Bank Platform Context Design a multi-tenant SaaS platform for org...
Design an A/B testing platform
This question evaluates the ability to design an end-to-end A/B testing platform, assessing competencies in distributed systems architecture, data mod...
Design a restaurant reservation system
Problem Design a restaurant reservation system similar to common booking products. The system should allow customers to search availability and book t...
Design a pub-sub replay system
This question evaluates a candidate's skills in distributed systems and streaming architectures, including pub-sub replay semantics, message ordering,...
Design Asset Storage System
This question evaluates proficiency in system design for scalable, durable asset storage and delivery, encompassing distributed storage, metadata mode...
Design a File Backup System
Design a scalable file backup system. You are given access to basic file-system primitives such as listing directories, reading file metadata, reading...
Design a low-latency trading platform
This question evaluates a candidate's ability to design a low-latency, real-time trading system, covering competencies in distributed systems, streami...
Design Ad Frequency and Order Tracking
This question evaluates system-design competencies for building low-latency, high-throughput ad-platform components—specifically a real-time frequency...
Design a stock order manager
This question evaluates a candidate's ability to model and manage order lifecycle and state reconciliation, along with understanding of distributed-sy...