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 Payment Processing Service (Merchant to Payment Provider)
This system design question evaluates a candidate's ability to model a distributed payment processing service that coordinates authorization, capture,...
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 an AI playground editor
This question evaluates full-stack system design competencies including real-time response streaming, rich-text editor data modeling, backend APIs, pe...
Design a Twitter-like microblogging service
Design a Twitter-like microblogging system. You can describe it verbally and with structured notes. Requirements: - Users can post short messages. - U...
Design an Async Job Scheduler
Design an asynchronous job scheduler service. The service must support two job types: 1. Immediate jobs: submitted jobs that should run as soon as pos...
Design delivery driver payment system
Design a delivery-driver payment system Design and implement an in-memory, object-oriented service that tracks delivery-driver work and computes payro...
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 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 a Distributed Crossword Solver
This question evaluates competency in distributed systems design, algorithmic search and constraint satisfaction (e.g., DFS with constraint propagatio...
Design a Driver Leaderboard Based on Reviews
Design a service that ranks drivers from customer reviews and serves a top-driver leaderboard. The system must accept immutable review events containi...
Design Data Aggregation, Query, and One-Time Secret Systems
Design Data Aggregation, Query, and One-Time Secret Systems Address three independent system-design exercises. For each part, establish requirements, ...
Design a disk-backed KV store under contention
This question evaluates systems-design and concurrency engineering skills, specifically the ability to reason about durable on-disk storage, indexing ...
Design a GPU-aware pod scheduler
Design a GPU-aware pod scheduler GPU-Aware Pod Scheduler and Cluster Manager (OO Design) Context You are designing a simplified, object-oriented clust...
Design a DAU/MAU metrics system
Question Design a system that computes and serves product engagement metrics — DAU (Daily Active Users) and MAU (Monthly Active Users) — for a large c...
Design Real-Time Driver Pay Aggregation
Design a production system that ingests a high-volume stream of delivery-order events and continuously computes each driver's (Dasher's) daily pay. Th...
Design device logging system with offline upload
Design a logging system that collects logs from many client devices, uploads them to the backend, and makes them viewable in a web UI within 3–5 minut...
Design distributed median and mode
Design a Distributed System for Global Median and Global Mode at Massive Scale Context You are designing a distributed analytics system that computes ...
Scale a rules engine for high traffic
This question evaluates understanding of scalable real-time system design, distributed architectures, consistency versus latency trade-offs, caching a...
Design an RBAC Relational Schema
This question evaluates relational schema design and access-control modeling skills by testing understanding of RBAC concepts (users, roles, permissio...
Design a Core Dump Collection and Analysis System
Prepare for a Amazon system design interview about design a core dump collection and analysis system. This question focuses on requirements, architect...