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 Secure Copilot API
Design a secure API for an enterprise AI copilot product. The product serves many independent organizations (tenants). Authenticated end users send pr...
Design a scalable payment system
Design a scalable payment system Design a scalable payment system. The system must support both peer-to-peer money movement between users and merchant...
Design a hotel reservation system
This question evaluates skills in designing distributed reservation systems, covering availability search, concurrency control, data modeling, API des...
Design a Group Chat / Messaging System
Design a Group Chat / Messaging System Design the backend for a real-time group chat feature embedded in a large consumer product (think of the in-app...
Design a Small-Scale URL Shortener with Collision Handling
Design a Small-Scale URL Shortener with Collision Handling Design the simplest small-scale abstraction that converts a long URL into a short code and ...
Design an AI gateway
This question evaluates a candidate's competence in designing service-oriented architectures for integrating multiple external large language model pr...
Design streaming mention analytics with search and alerts
This question evaluates system-design competencies such as real-time stream ingestion, stateful stream processing and time-windowed aggregation, high-...
Design a geo-distributed rate limiter
Design a rate limiting system that works across multiple geographic regions (e.g., us-east, eu-west, ap-south). Requirements: - Enforce per-API-key li...
Design a KV store with QPS API
This question evaluates a candidate's ability to design scalable, highly available key-value storage systems and to integrate real-time metrics report...
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 a Neighborhood Newsfeed System
This question evaluates a candidate's ability to design a scalable, privacy-preserving neighborhood social feed system, testing competencies in distri...
Design real-time delivery tracking system
Question Design a real-time delivery / courier-tracking platform that gives dispatchers, operations, and customers live visibility into each courier's...
Design a 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 One-to-One Chat
Design a scalable one-to-one chat system. Scope: - Only direct one-to-one messaging is required. - Group chat, public channels, workspace features, an...
Design guardrails and fallback for LLM reliability
This question evaluates a candidate's ability to design safety and reliability layers for LLM-driven production systems, covering guardrails, input/ou...
Design An Ad Creative Relationship Processing System
Prepare for a system design interview about processing ad creative plans, videos, keywords, and relationship results from an external model API. The p...
Design a Scalable and Polite Web Crawler
Design a horizontally scalable web crawler with a durable frontier, host-level politeness, deduplication, parsing, and recrawl planning. Examine URL n...
Design a Food Review Platform
Design a Food Review Platform Design a platform where users discover food businesses, read reviews, and submit ratings and review text. Clarify whethe...
Design a subscription push service
Design a subscription push service Object-Oriented Design: Publish/Subscribe Notification Service Design an object-oriented publish/subscribe notifica...
Design a Scalable Likes System
This question evaluates system design and distributed-systems skills, specifically scalability, consistency, API and data schema design, indexing stra...