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Software Engineer Interview Questions
Practice 9403 coding, system design and machine learning questions from 546 companies, sorted by role, topic and interview round. Every question has step-by-step hints, a code runner that supports 8 languages and an AI mentor; members also get the full solution walkthrough.
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Showing 631–660 of 1189 results
- MetaMediumSoftware EngineerDesign the Frontend Data Flow and APIs for a Social Media News Feed
A product architecture design problem: starting from a feed mock-up, design the client data flow and APIs for a social news feed on web and mobile. It tests UX flow analysis, the shape of the feed response object, cursor-based pagination, and edge cases across client types.
System DesignOnsite - MetaMediumSoftware EngineerDesign ticketing system with seat hold
This question evaluates a candidate's skills in system design, distributed systems, concurrency control, data modeling, and scalability, testing their ability to reason about correctness and performance under high contention and heavy traffic as well as trade-offs between consistency and availability.
System DesignOnsite - MetaHardSoftware EngineerFind Nearby High Scores in a Large Game Leaderboard
Design a high-scale gaming leaderboard service capable of real-time score updates, deterministic tie-breaking, friend-filtered leaderboards, and efficient "nearby competitor" queries under extreme write loads.
System DesignOnsiteDistributed SystemsIn-Memory CachingLeaderboard - MetaHardSoftware EngineerMerge customers and preserve history
A Meta software-engineer system-design take-home: implement mergeCustomers(oldId, newId) for a payments/ledger platform, absorbing one customer into another while preserving every account's balance and immutable transaction history. Tests identity unification, ownership remap, conflict/duplicate resolution, top-N leaderboard maintenance, atomicity, concurrency, idempotency, and complexity analysis.
System DesignOnline Assessment - MetaMediumSoftware EngineerScale a Cache or Rate Limiter Across Multiple Machines
Tests your ability to design a horizontally scalable distributed rate limiter and caching layer, focusing on data partitioning, hot-key mitigation, failure modes, and consistency trade-offs.
System DesignOnsitesystem-designdistributed-systemsrate-limiting - MetaMediumSoftware EngineerTroubleshoot a single-node web outage
This question tests your ability to diagnose a sudden service outage on a single-node web server and your ability to propose architectural changes to prevent future single points of failure.
System DesignTechnical ScreenTroubleshootingAvailabilitySRE - MicrosoftMediumSoftware EngineerDesign A Low-Latency Product Price Update API
Prepare for a read-heavy product pricing system design interview where prices update infrequently but launch-page reads must be low latency. The prompt focuses on versioned price records, caching, bulk reads, invalidation, rollback, and consistency after daily updates.
System DesignOnsite - MicrosoftMediumSoftware EngineerDesign A Scalable Web Crawler
This question evaluates scalable system architecture and distributed systems competencies, specifically testing web crawler concepts such as URL discovery and deduplication, scheduling and prioritization, politeness-aware fetching, parsing and link extraction, storage of content and metadata, failure handling, and monitoring.
System DesignTechnical Screen - MicrosoftEasySoftware EngineerDesign Anonymous Product Sharing with Every-Nth Visitor Rewards
Design product pages and trackable sharing links with anonymous-visitor limits, atomic every-Nth rewards, recoverable redemption, and engagement analytics.
System DesignOnsite - MicrosoftMediumSoftware EngineerDesign Food-Delivery Proximity Search for Restaurants Within 10 km
A system design exercise to build proximity search for a food-delivery app that finds restaurants within 10 km of a customer, followed by hand-coding the core lookup. It tests geospatial indexing, read and write paths, partitioning, handling dense areas, and turning a design into correct code.
System DesignOnsite - MicrosoftMediumSoftware EngineerDesign User Re-engagement Notifications
This question evaluates a candidate's ability to design end-to-end re-engagement and reminder notification systems, assessing competencies in system architecture, data modeling, scheduling and delivery pipelines, reminder extraction from natural language, user preferences, rate limiting, metrics, privacy, reliability, and scalability.
System DesignOnsite - MicrosoftMediumSoftware EngineerDesign a ChatGPT-like serving system
This question tests the ability to design a scalable, low-latency LLM inference system, focusing on request handling, KV-cache optimization, and horizontal scaling strategies.
System DesignTechnical ScreenLLMScalabilityInference - MicrosoftMediumSoftware EngineerDesign a Distributed Key-Value Store
Tests your ability to architect a highly available, horizontally scalable distributed key-value store, evaluating core concepts including consistent hashing, tunable quorum consistency, storage engine trade-offs, and failure recovery.
System DesignOnsiteDistributed SystemsKey-Value StoreConsistent Hashing - MicrosoftMediumSoftware EngineerDesign a Global One-to-One Voice Calling System
Design global one-to-one voice calls with device registration, signaling, accept/reject races, media negotiation, relay fallback, and mobile recovery.
System DesignOnsite - MicrosoftMediumSoftware EngineerDesign a High-Concurrency Incident Ticket Correlation Platform
Design a scalable incident ticket correlation and management system capable of handling high-volume alert storms, maintaining interval-based status history, and performing asynchronous, idempotent incident deduplication and linking.
System DesignOnsiteDistributed SystemsEvent-DrivenData Modeling - MicrosoftMediumSoftware EngineerDesign a High-Volume Log Storage System with Live Tailing of Growing Files
Design a storage system that ingests a massive stream of log records into files and serves reads, including readers following files that are still being written. It probes partitioning, metadata for locating data across nodes, batching for write throughput, position-based live delivery, and the cost of long-lived reader connections at scale.
System DesignOnsite - MicrosoftEasySoftware EngineerDesign a Lab Machine Fleet Monitor: Payload Dispatch, Hang Detection, and Remote Reboot
Design a system that dispatches compute payloads to lab machines that poll for work and shows on a central dashboard whether each payload is downloading, running, completed, crashed, or hung. It tests agent design, hang detection, crash and hang logs, authorized reboot and power cycle, reruns after interruption, and refreshable machine inventory.
System DesignOnsite - MicrosoftMediumSoftware EngineerDesign a Real-Time Bike-Sharing System With Reservations and Live Tracking
A system design exercise for a real-time bike-sharing service where riders find nearby bikes, reserve and unlock them, and end trips by locking. It tests gathering requirements first, choosing location reporting rates, keeping telemetry writes off the transactional database, and making reservations correct under contention.
System DesignOnsite - MicrosoftMediumSoftware EngineerDesign a Real-Time Collaborative Document Editor with Concurrent Editing
A senior-level system design prompt asking for a browser-based document editor where many people edit the same file at once, similar to Google Docs. It tests concurrency control for simultaneous edits, real-time sync, durable storage with version history, sharing permissions, and how the service scales and recovers from failures.
System DesignOther - MicrosoftMediumSoftware EngineerDesign a Role-Based Access Control System With Fast Checks and Bounded Revocation
A senior system design question about a role-based access control system with roles, permissions, scoped assignments and inheritance, plus a permission check on every protected request. It tests data modeling, fast check evaluation, caching with a bounded revocation delay, behavior on failure, and auditing of changes.
System DesignOnsite - MicrosoftMediumSoftware EngineerDesign a Secure Copilot API
This question evaluates proficiency in designing secure, multi-tenant API systems with emphasis on authentication and authorization models, token lifecycle management, threat mitigation (such as replay attacks, token theft, and misuse), access control across tenants and tools, and scalability and reliability concerns.
System DesignOnsite - MicrosoftMediumSoftware EngineerDesign a Shared Proxy Layer That Cuts Microservices' API Call Costs
System design question about a shared proxy layer that lowers what microservices spend calling metered API endpoints. It tests placement choices, response caching, collapsing duplicate requests, batching, quotas and budgets, safe retries for writes, failure policies and per-service cost attribution.
System DesignOnsite - MicrosoftMediumSoftware EngineerDesign a Ticketmaster-like ticketing system
This problem tests your ability to design a high-concurrency reservation system that prevents overbooking while ensuring fairness and low latency during peak traffic.
System DesignOnsiteConcurrencyDistributed SystemsScalability - MicrosoftMediumSoftware EngineerDesign a To-Do List Service (CRUD, Auth, Rate Limiting, Caching & API Versioning)
This question tests the ability to design a scalable, multi-tenant To-Do service, focusing on API versioning, authentication, rate limiting, and data integrity.
System DesignTechnical ScreenAPI DesignCachingRate Limiting - MicrosoftMediumSoftware EngineerDesign a URL Shortener (High-Level and Low-Level Design)
This question tests the ability to design a distributed, scalable URL shortening service by addressing key generation strategies, storage schema, and caching policies.
System DesignTechnical ScreenScalabilityDatabaseCaching - MicrosoftMediumSoftware EngineerDesign a URL Shortening Service
This question tests the ability to design a distributed, scalable system for mapping long URLs to short aliases, focusing on hash generation, storage strategy, and performance optimization.
System DesignOnsiteScalabilityHashingCaching - MicrosoftMediumSoftware EngineerDesign a Voice and Chat AI Receptionist Platform
Design a multi-tenant voice/chat AI receptionist with approved knowledge, authorized actions, interruption handling, and real human conversation takeover.
System DesignOnsite - MicrosoftMediumSoftware EngineerDesign a Windows App Notification System While Working With an AI Assistant
A system design exercise to design the Windows notification platform that lets many applications post, update and display notifications, completed with an AI assistant. It tests component design, isolation between apps, user controls and load handling, plus how well the candidate prompts, refines and critically evaluates AI output.
System DesignOnsite - MicrosoftMediumSoftware EngineerDesign a cloud console main page
This question evaluates a candidate's understanding of designing a secure, multi-tenant cloud console main page, emphasizing authentication, authorization/permissions (including RBAC and scoped roles), audit logging, end-to-end request flow, and scaling for low-latency and high availability.
System DesignOnsite - MicrosoftMediumSoftware EngineerDesign a high-level logging system
This System Design question evaluates a candidate's ability to design scalable, reliable centralized logging and observability infrastructure, covering distributed systems concepts such as ingestion, durable storage, querying/indexing, access control, and multi-tenant separation.
System DesignTechnical Screen
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