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 smartwatch sensor subsystem
This question evaluates system-level engineering skills for designing a smartwatch sensing subsystem, including sensor selection, trade-offs among acc...
Design a Cryptocurrency Trading System with Third-Party Exchanges
Design a Cryptocurrency Trading System with Third-Party Exchanges Design a cryptocurrency trading platform that routes client orders to one or more th...
Design a hotel search and booking system
This question evaluates a candidate's ability in large-scale system design, covering distributed architecture, data modeling for hotels and availabili...
Design comments and async image generation
The system design portion combined two prompts: 1. Design a full-stack comment system with frontend, backend, and database support for create, read, u...
Design a delivery cost dashboard with payments
Design a delivery cost dashboard with payments Object-Oriented Delivery Cost Dashboard Service Goal Design and implement an object-oriented service to...
Design a cross-region event processing platform
Scenario Design a cross-region event processing platform that ingests events from producers, stores them durably, and delivers them to multiple consum...
Design a Payment System
Design a Payment System Design the backend payment system for an online platform that charges customers for goods and services (for example, a marketp...
Design a real-time favorites service at scale
Design: Real-Time Favorites/Unfavorites Service at High Scale Context Design a backend service that lets users favorite/unfavorite items (e.g., posts,...
Design a packet reassembler API
Design a PacketAssembler API for Streaming Fragments Context and Assumptions - You are building a small component that assembles packets from a byte s...
Design banking payment scheduling system
Design banking payment scheduling system System Design: Banking Payment System Enhancements Context You are building a minimal bank-transfer payment o...
How would you scale batch image pipelines?
This question evaluates a candidate's competence in designing scalable, reliable batch image-processing pipelines, testing knowledge of distributed sy...
Design ads frequency capping service
Design an Ads Frequency Capping Service Context You are designing a service that ensures a user does not see the same ad creative or campaign more tha...
Design an Ad Frequency Capping System
Design a frequency capping system for an advertising platform. A frequency cap limits how many times a user can be shown an ad, campaign, line item, o...
Design a One-to-One Chat System
This question evaluates a candidate's ability to design scalable, real-time backend architectures for one-to-one messaging, covering competencies in d...
Design a Twitter hashtag metrics aggregator
This question evaluates competency in designing scalable, low-latency real-time stream processing and aggregation systems, covering concepts such as w...
Design a user activity query system
This question evaluates a candidate's system design skills, including scalable data modeling, time-and-geo indexing, API design, storage and serving a...
Design a container image registry
This question evaluates a candidate's competency in designing large-scale distributed systems for artifact storage and delivery, including storage arc...
Design account system with cashback
Design account system with cashback System Design: Account Management with Transfers, Payments, and Cashback You are to design and implement an in-mem...
Diagnose overloaded Kubernetes cluster
Kubernetes Overload: End-to-End Debug + Mitigation Plan You are given a Kubernetes-based microservices system that is currently overloaded, exhibiting...
Design a Production-Ready URL Shortener
System Design: Production-Ready URL Shortening Service Goal Design a production-ready URL shortening service that can issue short links, resolve them ...