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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.
- 9403
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- 546
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- 11
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Showing 211–240 of 1189 results
- BlinkHardSoftware EngineerDesign a Support Ticket Processing System
This question tests your ability to design a distributed, asynchronous ticket processing system that handles high volume, prioritizes SLAs, and ensures reliable data delivery.
System DesignOnsiteScalabilityMessage QueuesDistributed Systems - BloombergMediumSoftware EngineerDesign A Real-Time VWAP Analytics Provider
Tests the ability to design an ultra-low-latency, stateful streaming pipeline that ingests heterogeneous market data feeds, maintains running volume-weighted aggregates, handles trade adjustments, and serves high-throughput subscriber fanout.
System DesignTechnical ScreenStream ProcessingLow LatencyFinancial Systems - BloombergMediumSoftware EngineerDesign a fair event registration queue API
This question tests the ability to design a thread-safe, high-concurrency registration system that handles FIFO ordering, capacity constraints, and efficient cancellation operations.
System DesignOnsiteConcurrencyData StructuresAPI Design - BloombergMediumSoftware EngineerDesign a packet reassembler API
This question evaluates API design, stream-oriented buffer management, stateful packet assembly, input validation, concurrency control, testing strategy, and time/space complexity reasoning.
System DesignTechnical Screen - BloombergMediumSoftware EngineerDesign in-memory trade subscription processor
This question evaluates a candidate's ability to design concurrent, high-throughput in-memory subscription matching systems, covering skills in data structure selection, algorithmic complexity analysis, and concurrency control.
System DesignOnsite - BloombergHardSoftware EngineerDesign streaming mention analytics with search and alerts
This question tests the ability to design a distributed, low-latency streaming pipeline that aggregates mention counts for entities, provides search capabilities, and triggers alerts based on configurable thresholds.
System DesignOnsiteDistributed SystemsStream ProcessingReal-time Analytics - BloombergHardSoftware EngineerExplain Kafka partitions and delivery semantics
This question evaluates understanding of distributed messaging and stream-processing concepts—specifically Kafka internals such as partitions, replication, consumer groups, and delivery semantics—and the candidate's competency in reasoning about ordering, scalability, fault tolerance, and transactional guarantees.
System DesignTechnical Screen - BobyardMediumSoftware EngineerDesign a client-side comment system
This question evaluates front-end engineering competencies including client-side data modeling, state management, UI behavior for nested comment trees, sorting/filtering semantics, and persistence using localStorage.
System DesignTechnical Screen - BobyardMediumSoftware EngineerDesign comments and async image generation
This question evaluates full-stack system-design competencies, including CRUD API and data-model design for sortable queries with persisted user preferences, frontend-backend synchronization, and asynchronous long-running job orchestration, status/result APIs, and UI ordering for image generation; it falls under the System Design category and tests a mix of conceptual architectural reasoning and practical application design. It is commonly asked because it probes the ability to balance scalability, consistency, user experience, and fault-tolerant asynchronous processing when designing end-to-end systems that must handle persistence, ordering guarantees, and long-running background work.
System DesignTechnical Screen - Booking.comMediumSoftware EngineerCompare heap, stack, Protobuf, gRPC, SQL, CI/CD
Compare heap, stack, Protobuf, gRPC, SQL, CI/CD evaluates requirements, scale assumptions, API/data design, architecture, trade-offs, failure modes, and rollout in a realistic interview setting. A strong answer states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.
System DesignTechnical Screen - Booking.comMediumSoftware EngineerDesign a Real-Time Logging System
This question evaluates a candidate's competency in designing scalable, low-latency telemetry and logging systems, covering distributed systems architecture, ingestion pipelines, data modeling, real-time querying, reliability, backpressure, partitioning, indexing, retention, and operational trade-offs.
System DesignOnsite - BoxMediumSoftware EngineerDiagnose failures via SSH and large logs
Diagnose failures via SSH and large logs evaluates requirements, scale assumptions, API/data design, architecture, trade-offs, failure modes, and rollout in a realistic interview setting. A strong answer states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.
System DesignOnsite - BoxHardSoftware EngineerExplain and diagram your past system architecture
Explain and diagram your past system architecture evaluates requirements, scale assumptions, API/data design, architecture, trade-offs, failure modes, and rollout in a realistic interview setting. A strong answer states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.
System DesignOnsite - BoxMediumSoftware EngineerIdentify and fix deadlock in locked code
Identify and fix deadlock in locked code evaluates requirements, scale assumptions, API/data design, architecture, trade-offs, failure modes, and rollout in a realistic interview setting. A strong answer states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.
System DesignOnsite - BrexMediumSoftware EngineerBuild AI-Assisted Full-Stack Transactions App
This question evaluates full‑stack engineering competencies including API design, data persistence, input validation, transactional integrity for monetary data, frontend-backend integration, automated testing, and developer documentation.
System DesignTechnical Screen - BrexHardSoftware EngineerDesign Points-from-Transactions Service
This question evaluates system design and distributed-systems competency, focusing on transaction processing, idempotency and deduplication, monetary precision and rounding, consistency models, data modeling, and operational controls like observability and fraud prevention.
System DesignTechnical Screen - BrexMediumSoftware EngineerDesign a Peer-to-Peer Money Transfer System
Design a peer-to-peer money transfer product with accurate balances and history despite retries, crashes, and concurrent spending. Define APIs, transfer states, durable accounting, atomic movement, recovery, reconciliation, authorization, and the boundary between an in-memory prototype and production.
System DesignOnsite - BridgeMediumSoftware EngineerDesign signup and login service
This question evaluates understanding of authentication system design, secure password storage practices, API endpoint and request/response modeling, database schema design, and session or token-based login state management.
System DesignTechnical Screen - ByteDanceMediumSoftware EngineerDesign An Ad Creative Relationship Processing System
This question tests your ability to design a distributed asynchronous processing pipeline that manages entity relationships, handles API retries, and maintains state consistency across multiple dependent components.
System DesignTechnical ScreenDistributed SystemsAsync ProcessingDatabase Schema - ByteDanceMediumSoftware EngineerDesign Near-Real-Time Top Songs by Country
This question tests your ability to design a distributed streaming data pipeline that balances high-throughput ingestion with low-latency analytical queries for country-specific rankings.
System DesignOnsiteStreamingDistributed SystemsScalability - ByteDanceMediumSoftware EngineerDesign a Distributed Rate Limiter
This question tests the ability to design a scalable, low-latency rate limiting service that functions across multiple distributed application servers.
System DesignOnsiteDistributed SystemsCachingLatency - ByteDanceMediumSoftware EngineerDesign a High-Frequency Job Scheduler
This question tests your ability to design a distributed, high-frequency job scheduling system that handles millions of tasks with varying priorities while ensuring reliability and strict execution guarantees.
System DesignOnsiteDistributed SystemsScalabilityConcurrency - ByteDanceMediumSoftware EngineerDesign a Monitoring Dashboard with Explicit Latency Goals
Design a monitoring dashboard that separates data freshness from query latency, with ingestion, rollups, browser updates, and stale-data handling.
System DesignTechnical Screen - ByteDanceMediumSoftware EngineerDesign a Payment System: Time-Boxed High-Level Design
A time-boxed system design question asking for a high-level payment system that charges users through an external payment provider. It tests the end-to-end checkout flow, idempotent retries, a payment state machine and ledger, asynchronous provider notifications, reconciliation and failure handling.
System DesignOnsite - ByteDanceMediumSoftware EngineerDesign a Real-Time Auction Platform
This question evaluates a candidate's ability to design a real-time, high-throughput distributed system focusing on API design, concurrency control, ordering guarantees, idempotency, persistence of bid history and state transitions, and real-time push/update mechanisms.
System DesignOnsite - ByteDanceHardSoftware EngineerDesign a Synchronized Live Comment Overlay
Design a live comment overlay that stays synchronized with a video during live viewing, replay, seeking, and reconnects. Explore timeline semantics, stable ordering, scalable fanout, replay queries, moderation, backpressure, and graceful degradation during traffic bursts.
System DesignTechnical Screen - ByteDanceMediumSoftware EngineerDesign a Ticket Booking System for High-Demand On-Sales Without Overselling
A system design question about a ticket booking system for high-demand on-sales. It probes how to absorb the traffic spike when sales open with load balancing, waiting rooms and rate limiting, and how to manage inventory with holds, payment-timeout release and consistent cache and database updates so that no ticket is ever sold twice.
System DesignTechnical Screen - ByteDanceMediumSoftware EngineerDesign a payment system with real-time holds, batch settlement and safe retries
System design question: design a payment system that places real-time holds on funds and settles them in batches, then explain how retries avoid double charges. It probes idempotency at every hop, payment state machines, double-entry ledgers, consistency across an external processor, reconciliation, and recovery from specific failures.
System DesignOnsite - ByteDanceHardSoftware EngineerDesign an E-Commerce Platform with Reliable Checkout
Design an e-commerce platform with searchable catalogs, carts, atomic inventory reservations, idempotent checkout, payment recovery, and reliable order state.
System DesignTechnical Screen - ByteDanceMediumSoftware EngineerDesign an RBAC Relational Schema
This problem tests your ability to design a normalized relational database schema that implements Role-Based Access Control (RBAC) to support hierarchical users, roles, and resource-level permissions.
System DesignTechnical ScreenSQLDatabase SchemaRBAC
Bloomberg
Booking.com
Box
Brex