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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 5251–5280 of 5874 results
- StubHubMediumSoftware EngineerBuild Event Notification Engine
This question evaluates a candidate's competency in modular software design and extensibility, algorithmic filtering and ranking, date arithmetic for birthday proximity, geospatial distance computation, and integration with notification services.
Coding & AlgorithmsOnsite - StubHubMediumSoftware EngineerDesign Composable Event Recommendations
This problem tests your ability to design a flexible, object-oriented recommendation engine that allows for composable filtering and ranking logic using the strategy or decorator pattern.
Coding & AlgorithmsOnsiteSystem DesignAlgorithmsOOP - StubHubMediumSoftware EngineerDesign Event Email System
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 Event Email System states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.
System DesignOnsite - StubHubMediumSoftware EngineerDesign Internal Chat and Re-engagement Emails
This question evaluates a candidate's competency in designing scalable, real-time messaging systems and re-engagement workflows, covering distributed systems concepts such as WebSocket-based bidirectional communication, presence, cross-server message routing, message persistence, APIs, storage trade-offs, inactivity detection, and email-triggering workflows. Commonly asked in the System Design category, it tests high-level architectural reasoning and practical application of scalability, reliability, and failure-handling trade-offs when integrating persistent WebSocket connections, cross-server routing, and background email jobs in a distributed platform.
System DesignOnsite - StubHubMediumSoftware EngineerDesign a Global Marketing Email Platform
This problem tests your ability to design a high-throughput, fault-tolerant email delivery system that handles scheduling across time zones, manages email templates, and provides basic analytics.
System DesignOnsiteScalabilityDistributed SystemsMessaging - StubHubMediumSoftware EngineerDesign an Event Recommendation Engine
This question evaluates object-oriented design, system extensibility, interface and responsibility definition, and integration with external services in the context of a recommendation engine.
Software Engineering FundamentalsTechnical Screen - StubHubMediumSoftware EngineerExplain a resume project end-to-end
This question evaluates a candidate's ability to communicate technical ownership, end-to-end system thinking, measurable impact, and cross-functional leadership through description of problem context, architecture decisions, tooling, timelines, and outcomes.
Behavioral & LeadershipTechnical Screen - StubHubMediumSoftware EngineerImplement a Composable Event Recommendation Engine
This problem tests your ability to design a flexible, object-oriented recommendation pipeline using the Strategy and Composite patterns to handle multiple scoring rules and fallback logic.
Coding & AlgorithmsOnsiteOOPStrategy PatternRecommendation Systems - StubHubHardSoftware EngineerReview getEvents endpoint for readability, performance, scalability, security
A StubHub software-engineer technical-screen system-design exercise: review and fix a GET /events HTTP handler that loads related data (venue, performers, tickets, transactions) per event. Candidates must find and fix the N+1 query, then harden the endpoint across readability/architecture, performance (pagination, indexing, caching), scalability (timeouts, retries, rate limiting), and security (authN/authZ, injection, PII), with trade-offs, SLOs, and a test plan.
System DesignTechnical Screen - SumologicMediumSoftware EngineerSolve substring and access-log problems
This problem tests your ability to process log data and perform string manipulation by identifying users who visited a specific URL across multiple days and determining the longest common substring between two modified strings.
Coding & AlgorithmsOnsiteStringsHashingDynamic Programming - SunoMediumSoftware EngineerDescribe product usage, feedback, and music experience
This question evaluates a candidate's product sense, user empathy, communication skills, and domain knowledge in music by asking for descriptions of product usage, concrete feedback, and personal musical background.
Behavioral & LeadershipHR Screen - SunriseEasySoftware EngineerExplain the least squares method
Explain the least squares method evaluates core ML concepts, assumptions, math intuition, training/evaluation trade-offs, and practical failure modes in a realistic interview setting. A strong answer states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.
Machine LearningOnsite - SupioEasySoftware EngineerCompute max planes shot and session count
These questions evaluate algorithmic problem-solving skills: the first focuses on greedy scheduling and time-step simulation to maximize actions before deadlines while the second tests event aggregation, sorting and grouping logic for sessionization.
Coding & AlgorithmsTechnical Screen - SupioEasySoftware EngineerDebug and extend a streaming chat app
This question evaluates debugging and implementation skills across frontend-backend interaction, including authentication/configuration, client-side state management, streamed response handling, request cancellation, and reasoning about API payload contracts.
Software Engineering FundamentalsTechnical Screen - TekionMediumSoftware EngineerCount Open Lockers After 100 Rounds
This problem tests mathematical reasoning and pattern recognition, specifically the relationship between integer divisors and toggling operations.
Statistics & MathTechnical ScreenMathematicsNumber TheoryPattern Recognition - TekionMediumSoftware EngineerFind an Optimal Strategy for an Even-Row Coin Game
Analyze optimal play in an even-row coin game, using position parity and game values to distinguish a guaranteed tie from a strict first-player win.
Statistics & MathTechnical Screen - TekionMediumSoftware EngineerFind the Maximum Number of Active Loans
This problem tests the ability to solve interval overlap challenges using the sweep-line algorithm, specifically handling boundary conditions where a loan ends at the exact time another begins.
Coding & AlgorithmsTechnical ScreenSweep-lineIntervalsSorting - TekionMediumSoftware EngineerMaximize Profit with at Most K Transactions
This problem tests dynamic programming optimization by finding the maximum profit from stock trading with a constraint on the total number of allowed transactions.
Coding & AlgorithmsTechnical ScreenDynamic ProgrammingAlgorithmsOptimization - TemporalMediumSoftware EngineerDesign a One-to-One Chat System
This problem tests your ability to design a distributed, low-latency, real-time messaging system, focusing on message delivery guarantees, state management, and scalability.
System DesignTechnical ScreenWebSocketsDistributed SystemsScalability - TemporalMediumSoftware EngineerImplement Concurrent Any-True Shot
This question tests the ability to manage concurrent asynchronous tasks, specifically implementing logic to return the first 'True' result while efficiently cancelling remaining pending tasks.
Coding & AlgorithmsTechnical ScreenConcurrencyAsyncCancellation - TemuEasySoftware EngineerFind missing rank in a straight
This question evaluates a candidate's ability to map and manipulate encoded card ranks, reason about consecutive sequences with Ace-as-low or Ace-as-high semantics, and identify a missing element within a constrained set.
Coding & AlgorithmsOnsite - TemuEasySoftware EngineerFind next greater element for subset
This question evaluates understanding of sequence analysis and array-processing competencies, including mapping elements between arrays, index lookup, and designing efficient order-dependent algorithms for the "next greater element" problem.
Coding & AlgorithmsOnsite - TemuMediumSoftware EngineerSpiral Order of a Matrix With Blocker Cells That Force Clockwise Turns
Traverse an m x n matrix clockwise from the outside in, then handle a follow-up where some cells are blockers that the walk must turn away from. Tests careful simulation of direction changes, tracking of visited cells, and a precise rule for when the traversal stops.
Coding & AlgorithmsTechnical Screen - TeslaEasySoftware EngineerAnswer HR screening questions for data role
This question evaluates a candidate's communication, self-presentation, motivation, and ability to summarize past project responsibilities and challenges relevant to a data platform role.
Behavioral & LeadershipHR Screen - TeslaMediumSoftware EngineerBalance Backend Availability, Maintainability, and Scalability
Design a high-throughput vehicle telemetry and diagnostics backend while evaluating explicit architectural trade-offs among availability, maintainability, and scalability.
System DesignHR ScreenDistributed SystemsIoTKafka - TeslaMediumSoftware EngineerCalculate trapped water between elevation bars
This question evaluates array manipulation, algorithmic optimization, and complexity analysis, specifically the ability to reason about time and space trade-offs and design a linear-time, constant-space approach for computing trapped water.
Coding & AlgorithmsTechnical Screen - TeslaMediumSoftware EngineerCoordinate Counter Updates Across Threads
Tests multi-threaded synchronization, atomic operations, barrier synchronization, and coordinated condition handling across concurrent threads.
Software Engineering FundamentalsOnsiteconcurrencymultithreadingsynchronization - TeslaHardSoftware EngineerCoordinate workers across two exclusive targets
This problem tests your ability to manage concurrent resources using synchronization primitives, ensuring workers can safely alternate between two exclusive tasks while maintaining thread safety.
Coding & AlgorithmsTechnical ScreenConcurrencySynchronizationMultithreading - TeslaEasySoftware EngineerCount the Ways to Decode a Numeric Cipher
This problem tests your ability to solve a counting problem using dynamic programming by identifying overlapping subproblems in a sequence of numeric mappings.
Coding & AlgorithmsOnsiteDynamic ProgrammingString ManipulationAlgorithms - TeslaMediumSoftware EngineerDescribe how you use Kubernetes
Describe how you use Kubernetes 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
StubHub
Temu
Tesla