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 real-time exchange data sync system
Design real-time exchange data sync system System Design: Real-Time Multi-Exchange Stock Data Ingestion and Live Web Page Context You are asked to des...
Design a Scheduler and Metrics Platform
Design a cloud-native job scheduling and metrics monitoring platform for a Kubernetes-like environment. The platform should allow internal users to su...
Design a thread-safe high-QPS rate limiter
Question You are building a backend service that must enforce API rate limits. Design and (at a high level) implement a rate limiter, then work throug...
Design a scalable Instagram-like platform
Design a scalable Instagram-like platform Design: Instagram-like Photo/Video Sharing Platform (Technical Screen) Context Design a photo/video sharing ...
Design a global notification service
Design a global notification service System Design: Globally Distributed Notification Service Context You are designing a multi-tenant notification pl...
Design overload protection with load shedding
Design overload protection with load shedding Design: Maintain p99 Latency SLOs During Sudden Traffic Spikes Context You are designing a user-facing, ...
Explain Kafka architecture and reliability semantics
Explain Kafka architecture and reliability semantics Kafka Architecture and End-to-End Semantics You are asked to explain Kafka's core architecture an...
Explain Redis design, persistence, and scaling
Explain Redis design, persistence, and scaling Redis: Data Structures, Persistence, Eviction, High Availability, and Operational Pitfalls Context: You...
Design an e-commerce category page
Design an e-commerce category page System Design: Category Page with Facets, Sorting, Pagination, SEO, Caching, Personalization, and Real-Time Updates...
Design a scalable key-value configuration service
Design a scalable key-value configuration service Design a Globally Distributed Key–Value Configuration Service Background You are asked to design a g...
Design a Dropbox-like file storage and sync service
Design a Dropbox-like file storage and sync service Design a cloud file storage and synchronization service like Dropbox / Google Drive. The system sh...
Design a Moderated Messaging Service
This question evaluates system design competency, covering scalable distributed architecture, data modeling, API design, integration with external mod...
Design a distributed crossword solving service
This question evaluates distributed systems and large-scale backend architecture skills, including task decomposition, scheduling, dynamic load balanc...
Design 64-bit distributed IDs and a parking lot
You have two system-design prompts. 1) 64-bit database ID generator Design a service/library that generates globally unique 64-bit integer IDs for dat...
Design a job scheduler ETL pipeline system
This question evaluates a candidate's ability to architect scalable, reliable job scheduling and ETL orchestration systems, testing competencies in di...
Design a live video comments system
This question evaluates skills in designing scalable, low-latency real-time systems, covering fan-out delivery, ordering and consistency semantics, du...
Design a distributed rate limiter service
This question evaluates competency in distributed systems design, focusing on scalability, consistency, concurrency control, storage and sharding choi...
Design a crossword puzzle solver system
This question evaluates algorithm design, constraint solving, efficient lookup data structures, and system scalability for handling large dictionaries...
Design a cloud-based global property rental platform
This question evaluates skills in cloud-native system architecture, distributed systems design, scalability, security, data modeling, and operational ...
Design market price change notifications
Design a system that notifies users when market prices change for the symbols they track. Context and requirements: - Users maintain a watchlist of sy...