System Design interview questions

Showing 811–840 of 1311 results

• Design Chargeback Ingestion and CSV DeliveryMedium

  Tests the ability to design an end-to-end financial transaction pipeline that ingests, deduplicates, and validates chargeback events, then reliably batches and delivers immutable CSV files to external card schemes via SFTP.

  NubankSoftware EngineerSystem DesignOnsite
• Design a chargeback ingestion and export systemEasy

  This question assesses the ability to design a distributed system that reliably ingests high-volume transaction records and prepares them for periodic downstream delivery while ensuring data consistency and auditability.

  NubankSoftware EngineerSystem DesignOnsite
• Design an Online Coding Competition PlatformMedium

  Design a scalable online coding contest platform capable of securely executing untrusted user code, producing deterministic scores, and maintaining both a real-time top-100 leaderboard and exact rank lookups.

  NubankSoftware EngineerSystem DesignTechnical Screen
• Design Webhooks and Metric AggregationHard

  Design a webhook delivery platform and vehicle telemetry aggregation system. The solution covers multi-tenant subscriptions, at-least-once delivery, retries, signing, DLQs, endpoint isolation, high-volume ingestion, stream processing, raw storage, rollups, alerting, late events, and downsampling.

  NuroBackend EngineerSystem DesignOnsite
• Design a Reliable Job SchedulerMedium

  Design a fault-tolerant distributed job scheduler capable of handling delayed execution, job cancellation, timeout detection, and automatic worker retries.

  NuroSoftware EngineerSystem DesignTechnical Screen
• Design a Scheduler for Weekly Self-Driving Simulation Jobs with Dependent PhasesMedium

  A system design question about scheduling a weekly batch of about 10,000 self-driving car simulation cases, where each case runs several phases that depend on one another. It tests dependency tracking, dispatch to GPU and CPU worker pools, retries and leases, prioritization against a deadline, and observability.

  NuroSoftware EngineerSystem DesignTechnical Screen
• Design fast search for AV raw logsMedium

  This question tests the ability to architect a distributed storage and retrieval system capable of handling high-velocity, high-volume sensor telemetry data while supporting efficient time-range queries.

  NuroSoftware EngineerSystem DesignTechnical Screen
• Schedule CPU and GPU Video ProcessingHard

  Design a distributed heterogeneous batch-processing system to schedule and execute multi-stage video pipelines across CPU and GPU worker clusters with fault tolerance, backpressure, and cost-efficient resource management.

  NuroSoftware EngineerSystem DesignOnsite
• Search Large Vehicle Records with Bounded MemoryHard

  Design a petabyte-scale search engine for autonomous vehicle records supporting multidimensional range queries, bounded-memory query execution, and stable streaming pagination.

  NuroSoftware EngineerSystem DesignOnsite
• Design Cross-Domain SSO and OIDC Access to Third-Party ToolsMedium

  Design cross-domain SSO with OIDC authorization-code flow, separate site sessions, secure account linking, third-party federation, and delegated API authorization.

  OktaBackend EngineerSystem DesignOnsite
• Design High-Throughput Messaging InfrastructureMedium

  This problem tests your ability to design a scalable, reliable messaging system by balancing throughput, latency, and data persistence in a high-concurrency environment.

  OktaFrontend EngineerSystem DesignTechnical Screen
• Design Single Sign-On Across Two Acquired Sites With OIDC FederationMedium

  Design cross-domain single sign-on after one company acquires a second site on a different domain, then extend it to many sites and to delegated API access for third-party tools, covering the authorization-code flow, session separation, and the authentication-versus-authorization distinction.

  OktaBackend EngineerSystem DesignOnsite
• Design a Metrics Storage PlatformMedium

  This question assesses the ability to architect a scalable time-series database capable of handling high-velocity metric ingestion, efficient long-term storage, and sub-second query performance.

  OktaSoftware EngineerSystem DesignTechnical Screen
• Design a Discord-Style Communication PlatformEasy

  This problem tests your ability to design a scalable real-time messaging architecture, focusing on handling message persistence, state synchronization for offline clients, and channel-based message distribution.

  OnepaySoftware EngineerSystem DesignTechnical Screen
• Design Android MVVM API ArchitectureMedium

  Design a robust, scalable Android client architecture using MVVM and Unidirectional Data Flow (UDF) to interact with remote REST and streaming APIs, handling configuration changes, lifecycle events, and coroutine cancellation.

  OpenAIAndroid EngineerSystem DesignTechnical Screen
• Design Bakery Chain Card Payments With Tips and Nightly SettlementMedium

  Design the payment system for a bakery chain's counter terminals, where a card is authorized for the purchase, a tip is added afterward, and each location's transactions are captured together in a nightly settlement batch that must scale as the chain grows.

  OpenAISoftware EngineerSystem DesignOnsite
• Design CI/CD Build CachingMedium

  This problem evaluates your ability to design a distributed caching system for CI/CD pipelines, focusing on cache key strategies, invalidation, and storage scalability.

  OpenAISoftware EngineerSystem DesignTechnical Screen
• Design Command Dispatch and Telemetry Reconciliation for Unreliable DevicesHard

  Design a resilient control plane and telemetry reconciliation system for millions of intermittently connected edge devices, ensuring safe command execution, idempotency, and accurate state tracking despite network unreliability.

  OpenAISoftware EngineerSystem DesignTechnical Screen
• Design Duplicate File DetectionMedium

  This question tests the ability to design a scalable content-based deduplication system using cryptographic hashing and distributed storage principles to manage large-scale file ingestion.

  OpenAIMachine Learning EngineerSystem DesignOnsite
• Design GPU Scheduling for a Video Generation PlatformMedium

  This question tests your ability to design a distributed job scheduling system that manages heterogeneous GPU resources for computationally expensive, variable-length video generation tasks.

  OpenAISoftware EngineerSystem DesignOnsite
• Design GPU credit allocatorHard

  A multi-tenant GPU credit allocation system design (OpenAI software-engineer system-design screen): track and deduct GPU credits in real time across many nodes, issue/transfer/spend credits via idempotent APIs, and enforce budgets, hierarchical quotas, rate limits, and fair-share with scheduler integration. Covers prepaid vs postpaid, an immutable double-entry ledger with reservations, overspend prevention, failure recovery, scaling, and observability.

  OpenAISoftware EngineerSystem DesignTechnical Screen
• Design IDE Sandbox and PaymentsHard

  This question evaluates system design competencies such as distributed systems architecture, scalability, isolation and security, API and state-machine design, storage and synchronization, resiliency, observability, and compliance applied to two domains: a cloud IDE sandbox and a payment processing backend, with domain: System Design.

  OpenAISoftware EngineerSystem DesignOnsite
• Design Mobile Model Usage QuotasMedium

  Design an end-to-end quota and rate-limiting system for a mobile AI chat client, focusing on client-side state management, API contract design, and multi-device synchronization.

  OpenAIAndroid EngineerSystem DesignTechnical Screen
• Design Online Chess MatchmakingHard

  This question tests the ability to design a distributed, low-latency matchmaking system that balances player skill (MMR), wait time, and network latency under high concurrency.

  OpenAISoftware EngineerSystem DesignTechnical Screen
• Design Online Chess Matchmaking and ClocksMedium

  This question tests your ability to design a real-time game backend, focusing on low-latency state synchronization, fair matchmaking, and reliable clock management in a distributed environment.

  OpenAISoftware EngineerSystem DesignTechnical Screen
• Design Payment Authorization, Capture, and Batch SettlementMedium

  Design a resilient payment processing platform supporting two-phase payment operations (authorize and capture), double-entry ledgering, and asynchronous batch settlement with external financial gateways.

  OpenAISoftware EngineerSystem DesignTechnical Screen
• Design Photo Storage with SHA-256 Content Deduplication and Safe DeletionHard

  Design a photo storage service that deduplicates identical uploads by their SHA-256 content hash. Cover the upload flow with server-side verification, concurrent identical uploads, deletion with reference counting and garbage collection, and the privacy risks of deduplicating across users. It tests content-addressed storage design.

  OpenAISoftware EngineerSystem DesignOnsite
• Design Power-Grid Device Monitoring over Unreliable Networks: Dedup and Late EventsHard

  Design a monitoring platform for power-grid devices that report readings and upload logs over unreliable public networks. Ingestion must be idempotent, deduplicate retransmissions, handle out-of-order and late events and accept batched uploads. It tests IoT ingestion, event-time processing and resilience to reconnect storms.

  OpenAISoftware EngineerSystem DesignOnsite
• Design Real-Time Collaborative EditingMedium

  This question tests your ability to design a low-latency, distributed synchronization system that manages concurrent text edits from multiple users while maintaining eventual consistency.

  OpenAIMachine Learning EngineerSystem DesignTechnical Screen
• Design Real-Time Electricity Monitoring and Policy ControlHard

  Design a distributed real-time electricity monitoring and policy actuation system that ingests high-throughput telemetry, evaluates dynamic load-shedding policies with hysteresis, and reliably issues auditable commands to edge devices.

  OpenAISoftware EngineerSystem DesignTechnical Screen