System Design interview questions

Showing 1261–1290 of 1311 results

• Design E-Commerce Tables and Indexes for Recent-Spend QueriesMedium

  This question tests database schema normalization, data integrity in e-commerce transactions, and the ability to optimize SQL queries using indexing strategies.

  VisaSoftware Engineer ISystem DesignOnline Assessment
• Design a Ride-Hailing Backend That Matches Riders With Nearby DriversMedium

  Design the backend of an Uber-style ride-hailing service that matches riders with nearby drivers, streams live locations, and tracks trips to completion. It tests requirement scoping, geospatial indexing for moving drivers, race-free dispatch, real-time updates, failure handling, and the ability to lead a design discussion.

  VisaSoftware EngineerSystem DesignOnsite
• Design Spring Boot for high availability and background workMedium

  This question tests the ability to scale a stateless Spring Boot service while ensuring reliable execution of asynchronous background tasks in a distributed environment.

  Walmart LabsSoftware EngineerSystem DesignTechnical Screen
• Design a Large-Scale Real-Time Temperature Collection SystemMedium

  Design an end-to-end IoT temperature telemetry platform capable of ingesting high-throughput sensor streams, handling out-of-order data, projecting real-time status, and managing long-term time-series storage.

  Walmart LabsSoftware EngineerSystem DesignTechnical Screen
• Design a Metrics Monitoring DashboardMedium

  This question tests the ability to architect a scalable time-series data pipeline, focusing on ingestion, storage strategies for high-throughput metric data, and query performance for dashboard visualization.

  Walmart LabsSoftware EngineerSystem DesignTechnical Screen
• Design a Read- and Write-Heavy Product Catalog ServiceMedium

  Design a scalable, highly available product catalog platform supporting both high-frequency merchant updates and massive shopper read traffic while maintaining data integrity and search consistency.

  Walmart LabsSoftware EngineerSystem DesignOnsite
• Design a multi-carrier parcel delivery systemMedium

  This question evaluates system design and integration competencies, including distributed architecture, API design, data modeling, reliability, scalability, and handling heterogeneous third-party carrier integrations for a multi-carrier parcel shipping platform.

  Walmart LabsSoftware EngineerSystem DesignTechnical Screen
• Design aggregator for multiple downstream servicesEasy

  This question assesses the ability to design an API Gateway or Aggregator service that coordinates requests to multiple downstream microservices while managing latency, partial failures, and data aggregation.

  Walmart LabsSoftware EngineerSystem DesignOnsite
• Design an E-Commerce Checkout Flow That Prevents Concurrency BugsHard

  Design the checkout flow for a large online retailer, from cart to a confirmed, paid order, with the emphasis on preventing concurrency bugs. It tests stock reservation without overselling, idempotent order placement and payment, handling of carts and prices that change mid-checkout, and recovery from partial failures.

  Walmart LabsSoftware EngineerSystem DesignOnsite
• Design an ad content delivery system with A/B testingMedium

  This question evaluates system-design and distributed-systems competency, specifically real-time ad serving, targeting and campaign data modeling, high-throughput event logging, and A/B testing/experimentation infrastructure including experiment assignment and metric computation.

  Warner Bros DiscoverySoftware EngineerSystem DesignTechnical Screen
• Design Reliable Command Delivery Between Autonomous Vehicles and the CloudMedium

  Design a resilient, secure command dispatch and execution system between a cloud fleet management platform and autonomous vehicles operating over unreliable cellular networks.

  WaymoSoftware EngineerSystem DesignOnsite
• Design a Fleet That Collects Mapping DataHard

  Design fleet mapping-data collection with coverage goals, task assignment, offline buffering, resumable uploads, provenance, quality validation, and re-collection workflows.

  WaymoSoftware EngineerSystem DesignOnsite
• Design a Global Small-Image Caching ServiceMedium

  This problem tests the ability to design a highly available, globally distributed caching layer that handles high-throughput small-image delivery while maintaining data consistency and resilience against origin failures.

  WaymoSoftware EngineerSystem DesignTechnical Screen
• Design a Matchmaking Service With Join, Cancel, Matching, Notification and ExpiryMedium

  Design a matchmaking service that lets players join and cancel requests, pairs compatible players, notifies both, and handles disconnects and expired requests. Tests request state machines, atomic matching, partitioned waiting pools and reliable notification.

  WaymoSoftware EngineerSystem DesignOnsite
• Design a Real-Time Player Matchmaking ServiceMedium

  This problem tests the ability to design a distributed, low-latency matchmaking system capable of handling concurrent requests, state consistency, and efficient participant matching.

  WaymoSoftware EngineerSystem DesignTechnical Screen
• Design a Shared-Ride Matching and Trip ServiceMedium

  This problem tests the ability to architect a low-latency geospatial matching system that handles concurrency, real-time vehicle tracking, and the complex state management required for shared-ride optimization.

  WaymoSoftware EngineerSystem DesignOnsite
• Design a System for a Vehicle Fleet Collecting Map Data for Autonomous DrivingMedium

  A system design interview question asking you to design the system that runs a vehicle fleet collecting sensor data for autonomous driving maps. It tests coverage and mission planning, offloading very large sensor logs, reliable ingestion, data quality checks, privacy, and storage at petabyte scale.

  WaymoSoftware EngineerSystem DesignTechnical Screen
• Design an Object Storage Service With Buckets, Keys and Durable Blob StorageMedium

  Design an object storage service where clients store, read, list and delete blobs by key inside buckets. Covers the API, separating metadata from data nodes, replication versus erasure coding, visibility on write, prefix listing, repair and garbage collection.

  WaymoSoftware EngineerSystem DesignOnsite
• Design the Frontend for an AI Chat ApplicationMedium

  This question tests the ability to design a performant and resilient frontend architecture for a real-time, state-heavy AI chat interface capable of handling large message trees and network instability.

  WaymoFrontend EngineerSystem DesignOnsite
• Design the Frontend of an AI Chat Application With Streaming RepliesMedium

  Frontend-focused system design for an AI chat application. It covers component structure, conversation and message state, streaming replies, stop and retry, safe rendering of model output, performance on long conversations, accessibility and the backend API contract.

  WaymoFrontend EngineerSystem DesignOnsite
• Design Cursor Pagination for a Large DatasetMedium

  This problem tests the ability to design a performant, stable pagination system for large datasets using cursor-based navigation instead of offset-based pagination.

  Wells FargoSoftware EngineerSystem DesignTechnical Screen
• Design a Charity Donation WebsiteMedium

  Tests your ability to architect a resilient, high-throughput charity donation platform with strict payment idempotency, asynchronous transaction processing, real-time campaign counters, and financial auditability.

  WhatnotSoftware EngineerSystem DesignTechnical Screen
• Design a Direct Messaging System for an E-commerce MarketplaceMedium

  Design a scalable 1:1 direct messaging platform for an e-commerce marketplace that supports real-time chat, message ordering, read receipts, and offline push notifications across multiple devices.

  WhatnotSoftware EngineerSystem DesignTechnical Screen
• Design an Online Coding Contest PlatformMedium

  This problem tests your ability to design a distributed architecture for an online coding platform, focusing on secure code execution, high-concurrency submission handling, and real-time leaderboard updates.

  WhatnotSoftware EngineerSystem DesignTechnical Screen
• Design an Online Coding JudgeEasy

  This question evaluates system design and scalability skills, including distributed architectures, API and data model design, secure sandboxed code execution, artifact storage with signed URLs, and operational concerns such as observability, fault tolerance, and security.

  WhatnotSoftware EngineerSystem DesignTechnical Screen
• Improve and debug the shopping appMedium

  This question evaluates product-minded engineering competencies including product intuition, user-experience assessment, telemetry-driven diagnostics, funnel and segmentation analysis, and debugging/observability skills relevant to a machine learning engineer.

  WhatnotMachine Learning EngineerSystem DesignTechnical Screen
• Propose and Validate a Mobile App ImprovementMedium

  This question evaluates product design and system-design skills for mobile applications, including product thinking, high-level implementation planning, experimentation design, and metrics-driven decision-making within the system design category.

  WhatnotSoftware EngineerSystem DesignTechnical Screen
• Design a BLE Command HandlerHard

  This question evaluates a candidate's understanding of BLE communication, concurrency control, command queuing and sequencing, timeout and failure policies, lifecycle and cancellation handling, and testability for production-grade mobile applications.

  WhoopiOS EngineerSystem DesignTechnical Screen
• Design in-memory DB with TTL and historyHard

  This question evaluates system design skills around building an in-memory database, focusing on API design, data structures, time/version semantics (TTL and time-travel), filtered querying, and complexity reasoning.

  ZipHQSoftware EngineerSystem DesignTechnical Screen
• Design a Redundant Railroad CrossingMedium

  This question evaluates competency in safety-critical system design, covering requirements analysis, redundancy and fault-tolerance, sensor and actuator integration, real-time control logic, and monitoring and maintenance considerations.

  ZiplineSoftware EngineerSystem DesignOnsite