Software Engineer System Design Interview Questions
Practice 1,093 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 distributed rate limiter
Design a Rate Limiter with Burst Allowance and Distributed Coordination Context You are designing a rate limiter for an API gateway that serves high Q...
Design high-throughput event subscription system
Design an Event Ingestion and Subscription System Context You are asked to design a horizontally scalable platform where producers send high-volume ev...
Design a distributed system end-to-end
System Design: Multi-Tenant Interactive Analytics Platform Context Design a distributed, multi-tenant analytics service that lets customers: - Ingest ...
Design a notification system
System Design: Multi-Channel Notification Platform Context Design a multi-tenant notification platform that delivers messages across email, SMS, and m...
Design scalable inventory system and avoid races
System Design: Scalable, Highly Available Inventory Management Context Design an inventory management system for a high-traffic e-commerce platform th...
Implement a multi-step form in React
Build a Multi‑Step Form Component in React Context You are implementing a multi‑step web form in React. The form gathers user data over several steps ...
Extend rules for trip-level aggregates and outputs
Extend rules for trip-level aggregates and outputs Extend Rules Engine: Aggregate Trip-Level Policies Context You previously built an expense policy e...
Design a URL Shortener
This question evaluates a candidate's ability to design a scalable, highly available URL-shortening service, testing competencies in API design, short...
Plan a major database version upgrade
You have an application tier (API/web servers) talking to a primary database for writes and a secondary/replica database for reads. You need to perfor...
Route HTTP requests to pods in a cluster
In a Docker/Kubernetes-like container cluster running multiple replicas (pods) of a service, explain how an incoming HTTP request reaches a specific p...
Design a device owner lookup service
This question evaluates a candidate's understanding of system design concepts such as real-time event ingestion, handling out-of-order and duplicate e...
Design real-time ad impression and spend tracking
This question evaluates system design and distributed systems skills, focusing on real-time event ingestion, accurate counter aggregation, low-latency...
Design a RAG system for vehicle documents
Design a Retrieval-Augmented Generation (RAG) architecture to power a Q&A chatbot over vehicle documentation. Document types & characteristics - Sourc...
Choose tools for scalable distributed systems
This question evaluates proficiency in designing scalable distributed systems, testing requirement analysis (latency, throughput, durability, consiste...
Design a job scheduler with SLA and logs
This question evaluates understanding of distributed job scheduling, SLA enforcement, observability, and fault-tolerant execution across worker fleets...
Design the manual review workflow
Design the manual review workflow System Design: Human-in-the-Loop Review Subsystem Context You are designing a human-in-the-loop (HITL) review subsys...
Design a loan application system
Design a loan application system System Design: End-to-End Online Loan Application Platform Context Design a small online lending platform where appli...
Protect SLA and Choose Storage
You own a service that calculates delivery-order payments from order lifecycle events. Discuss two design questions: 1. If an upstream dependency sudd...
Design a Slack-like messaging system
This question evaluates system design and distributed-systems competencies, focusing on real-time messaging architecture, data modeling, scalability, ...
Design an Attendance Payroll Service
Design the backend service for an employee attendance system. The service should support: - Employees clocking in and clocking out. - Computing each e...