System Design interview questions

Showing 31–60 of 1311 results

• Design a Hotel Booking Platform Down to the SQL Tables and Booking TransactionMedium

  Design a hotel booking platform where travelers search by destination and dates and book rooms, down to the SQL tables and the booking transaction. Tests schema design with real constraints, preventing double booking under concurrency, payment holds and expiry, and a search path that scales separately.

  AirwallexBackend EngineerSystem DesignOther
• Design a Large-File Analysis Report SystemMedium

  Tests system design skills in architecting a secure, multi-tenant pipeline for large file ingestion and asynchronous batch analytics with resumable uploads and idempotent job processing.

  AirwallexSoftware EngineerSystem DesignTechnical Screen
• Design a Reusable React Autocomplete Input: API, Portals, Debounce and CachingMedium

  Design a reusable autocomplete search input for a React application on top of an existing search API. The discussion covers the API contract with pagination and limits, the component and portal architecture, throttling versus debouncing, client-side result caching strategies, and the public props and exports.

  AirwallexFrontend EngineerSystem DesignTechnical Screen
• Design an order-matching engineHard

  This question evaluates a candidate's ability to design a high-throughput, low-latency in-memory limit order-matching engine, testing competencies in data structure selection, algorithmic complexity, deterministic concurrency, API design, and handling domain-specific constraints such as self-trade prevention.

  Akuna CapitalSoftware EngineerSystem DesignTechnical Screen
• Design user communication functionsEasy

  This interview question evaluates requirements, scale assumptions, API/data design, architecture, trade-offs, failure modes, and rollout in a realistic interview setting. A strong answer for Design user communication functions states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.

  Akuna CapitalSoftware EngineerSystem DesignOnline Assessment
• Fix and harden an object poolHard

  This interview question evaluates requirements, scale assumptions, API/data design, architecture, trade-offs, failure modes, and rollout in a realistic interview setting. A strong answer for Fix and harden an object pool states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.

  Akuna CapitalSoftware EngineerSystem DesignOnline Assessment
• Implement a two-user communications handlerMedium

  This question evaluates skills in stateful resource management, API and abstraction design, custom exception handling, and input validation for enforcing a single-active connection between two users.

  Akuna CapitalSoftware EngineerSystem DesignOnline Assessment
• Idempotent Kafka Consumer: Duplicate Writes, Offset Commits and a Second DatabaseMedium

  A backend design discussion on making a concurrent Kafka consumer idempotent: how to stop duplicate effects when the same message is processed twice, whether a duplicate write should throw or return the existing data, how offsets keep advancing, and how to keep a second database consistent when publishing fails.

  AlibabaSoftware EngineerSystem DesignTechnical Screen
• Design scalable rate limiter with token bucketHard

  This question evaluates understanding of rate-limiting algorithms and scalability concepts, specifically comparing sliding-window and token-bucket approaches with attention to lazy refill, per-client state modeling, memory efficiency, concurrency, and extendability to distributed systems.

  AltruistSoftware EngineerSystem DesignTechnical Screen
• Accept Notification Bursts With Low LatencyMedium

  Design a high-throughput, low-latency notification ingestion and delivery service capable of absorbing sudden 10x traffic spikes while maintaining strict delivery SLOs and downstream rate limits.

  AmazonSoftware EngineerSystem DesignTechnical Screen
• Architect an AI Chatbot for Enterprise UsersMedium

  This question tests your ability to design a scalable, enterprise-grade AI chatbot system that handles high throughput, ensures data privacy, and integrates with existing business data stores.

  AmazonSoftware EngineerSystem DesignTechnical Screen
• Design Faceted Product Search at Large ScaleMedium

  Design a scalable e-commerce product search engine supporting full-text query matching, multi-attribute filtering, dynamic facet aggregations, and near real-time updates for volatile data like price and inventory.

  AmazonSoftware EngineerSystem DesignOnsite
• Design Human Avoidance for Warehouse RobotsMedium

  This problem evaluates your ability to design a real-time sensor-to-actuator pipeline for an autonomous robot, focusing on latency, sensor fusion, and safety-critical path adjustments.

  AmazonSoftware EngineerSystem DesignTechnical Screen
• Design Music Search, Playlists, and Playback ControlsMedium

  This problem tests the ability to design a scalable music streaming architecture, focusing on data modeling for search indices, conflict resolution in distributed state management, and robust API design for real-time playback control.

  AmazonSoftware EngineerSystem DesignOnsite
• Design Sent, Delivered and Read Receipts for a Mobile Messaging AppMedium

  A system design question about the sent, delivered and read indicators in a large mobile messaging app, for one-to-one and group chats. It tests how status updates travel from the recipient's device back to the sender, offline and multi-device behaviour, keeping status monotonic, and controlling the volume of status events.

  AmazonSoftware EngineerSystem DesignOther
• Design Thread-Safe Tagging and Bookstore SystemsHard

  This interview question evaluates requirements, scale assumptions, API/data design, architecture, trade-offs, failure modes, and rollout in a realistic interview setting. A strong answer for Design Thread-Safe Tagging and Bookstore Systems states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.

  AmazonSoftware EngineerSystem DesignOnsite
• Design VPC, IP plan, management, storage, SSOHard

  This interview question evaluates requirements, scale assumptions, API/data design, architecture, trade-offs, failure modes, and rollout in a realistic interview setting. A strong answer for Design VPC, IP plan, management, storage, SSO states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.

  AmazonSoftware EngineerSystem DesignTechnical Screen
• Design a Core Dump Collection and Analysis SystemHard

  This problem tests the ability to design a distributed, scalable ingestion and analysis pipeline for massive binary crash files while maintaining system performance and data availability.

  AmazonSoftware EngineerSystem DesignOnsite
• Design a Distributed Cron Job SchedulerMedium

  Design a fault-tolerant, horizontally scalable distributed cron scheduler capable of triggering millions of recurring tasks with at-least-once delivery semantics and deterministic run coordination.

  AmazonSoftware EngineerSystem DesignOnsite
• Design a Distributed In-Memory Cache: Partitioning, Failover and InvalidationMedium

  Design a distributed in-memory cache shared by many services in front of a database, covering single-node eviction and expiry, key partitioning and rebalancing, replication and failover, and keeping cached values consistent after writes. It also probes protection against miss stampedes and hot keys.

  AmazonSoftware EngineerSystem DesignOther
• Design a Distributed Job Scheduler with Run Logs and Exactly-Once ExecutionHard

  Design a highly available distributed job scheduler that handles one-time and recurring jobs, collects execution logs, and rigorously addresses the practical boundaries of exactly-once execution.

  AmazonSoftware EngineerSystem DesignOnsite
• Design a High-Availability Load BalancerHard

  This problem tests the ability to architect a highly available, scalable Layer 7 load balancer, focusing on fault tolerance, traffic distribution strategies, and system reliability.

  AmazonSoftware EngineerSystem DesignOnsite
• Design a Kafka-Based File Watcher for Millions of FilesMedium

  Design a Kafka file watcher for millions of files with source sharding, durable events, per-file ordering, missed-event reconciliation, and version-aware reads.

  AmazonSoftware EngineerSystem DesignTechnical Screen
• Design a Library Management System (API and Schema)Hard

  This problem evaluates your ability to design a schema and API for a transactional library system, focusing on handling concurrent checkouts and maintaining data integrity in a read-heavy environment.

  AmazonSoftware EngineerSystem DesignTechnical Screen
• Design a Low-Latency Ad Serving Backend With Targeting, Budgets and TrackingMedium

  An Amazon system design question: design an ad server that selects and returns an ad for each page request within a tight latency budget. It covers targeting and candidate retrieval, ranking and auctions, budget enforcement and pacing, impression and click tracking, and failure handling.

  AmazonSoftware EngineerSystem DesignOnsite
• Design a Multi-Branch Library Lending SystemMedium

  This problem tests the ability to design a distributed inventory and reservation system, focusing on concurrency control, transaction integrity across branches, and fault-tolerant service communication.

  AmazonSoftware EngineerSystem DesignTechnical Screen
• Design a Multi-Provider Financial DashboardMedium

  Design a financial dashboard that reconciles balances, securities, cryptocurrency, prices, and derived metrics from unreliable external providers. Explain freshness, historical reproducibility, permissions, corrections, outages, and how users can recognize partial or inconsistent data.

  AmazonSoftware EngineerSystem DesignOnsite
• Design a Perishable-Goods Inventory and Location Tracking SystemMedium

  This question tests the ability to design a distributed inventory system that handles high-frequency location updates and strict FIFO/expiry logic for perishable goods.

  AmazonSoftware EngineerSystem DesignTechnical Screen
• Design a Product Image Upload Pipeline for SellersMedium

  Design an asynchronous, distributed image processing and delivery pipeline for an e-commerce seller portal, focusing on direct-to-cloud uploads, state management, moderation workflows, and resilient global caching.

  AmazonSoftware EngineerSystem DesignOnsite
• Design a Ride-Hailing Matching SystemMedium

  This question evaluates competence in large-scale real-time system design, covering high-throughput ingestion and burst absorption, stream deduplication, geospatial indexing, and low-latency matching and caching for ride-hail workflows.

  AmazonSoftware EngineerSystem DesignOnsite