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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 841–870 of 2336 results
- DropboxMediumSoftware EngineerImplement feedback for word guessing game
This question evaluates a candidate's ability to implement string-processing, frequency-counting, and membership-validation logic to generate exact and misplaced character matches for a word-guessing game.
Coding & AlgorithmsOnsite - ExpediaMediumSoftware EngineerConsolidate Three Partner APIs into a Query Service
This problem tests your ability to design a robust middleware layer that abstracts heterogeneous downstream APIs into a unified, reliable, and performant service.
System DesignOnsiteAPI AggregationMiddlewareMicroservices - ExpediaHardSoftware EngineerDesign a natural-disaster notification system
This problem tests your ability to design a high-throughput, geo-aware notification system that must deliver time-sensitive alerts to users based on their current or planned location during natural disasters.
System DesignOnsiteGeospatialScalabilityEvent-Driven - ExpediaHardSoftware EngineerDesign an employee directory with reporting queries
This question tests the ability to design a scalable hierarchical data structure, select appropriate storage backends for recursive queries, and handle write-heavy concurrent updates to organizational charts.
System DesignOnsiteDatabase ModelingHierarchical DataAPI Design - ExpediaMediumSoftware EngineerFind a Canonical Shortest Round Trip Through Flights
Find the shortest directed round trip starting and ending at a given airport, breaking ties lexicographically.
Coding & AlgorithmsOnsitegraphbfsshortest-path - ExpediaHardSoftware EngineerHow do you learn new knowledge quickly?
This question evaluates learning agility, self-directed acquisition of new technologies, and reflective leadership through concrete examples of challenging projects, testing behavioral and leadership competencies for a software engineer role.
Behavioral & LeadershipOnsite - FaireMediumSoftware EngineerCollaborating With and Helping an ML Engineer as an ML Infrastructure Engineer
A behavioral cross-functional collaboration question for a software engineer on a machine learning infrastructure team, posed by an ML engineer who uses the platform. It tests how you would discover an internal customer's needs, agree on priorities, communicate through changes and failures, and help them succeed.
Behavioral & LeadershipOnsite - FaireMediumSoftware EngineerDesign a product likes system for a marketplace of brands and retailers
Design the backend for product likes on a marketplace where retailers like or dislike products, list the products they liked and see like counts in search results, while brands see the likes on their own products. Tests data modeling for two access directions, counter maintenance, idempotent writes and scaling the search read path.
System DesignOnsite - FaireMediumSoftware EngineerMax inherited discount and discount-source audit in a category DAG
A two-part coding problem on an e-commerce category hierarchy shaped as a DAG, where a product's applied discount is the largest discount on its category or any ancestor. The follow-up asks for an audit of which discounted categories appear in the ancestry of each bottom-level category, testing traversal order, deduplication and shared work.
Software Engineering FundamentalsOnsite - FaireMediumSoftware EngineerPeak number of bikes needed to cover all pre-booked rental intervals
Given every booking for a bike rental service as a start and end time, compute the peak number of bikes in use at the same moment, which is the smallest fleet that serves all bookings. Tests interval-overlap reasoning, half-open boundary handling and an efficient method for up to 100,000 unsorted bookings.
Coding & AlgorithmsOnsite - FaireMediumSoftware EngineerValidate assumptions and align stakeholders for a new user-permission feature
An engineer is asked how to validate the assumptions behind a new feature that changes a product's user permission model and how to reach agreement with stakeholders such as security, support and sales. Tests risk-ranked validation, safe migration of existing access, staged rollout, and turning disagreements into clear decisions.
Product / Decision MakingOnsite - FanaticsMediumSoftware EngineerClarify employment type at Microsoft
This question evaluates a candidate's ability to clearly articulate employment arrangements and the degree of ownership, accountability, performance evaluation, and measurable impact on projects, reflecting leadership, communication, and product-stewardship competencies.
Behavioral & LeadershipOnsite - FanaticsHardSoftware EngineerDesign a retail trading platform
This question evaluates a candidate's competencies in designing scalable, low-latency retail trading systems, covering system architecture, order routing and state management, market data ingestion, cash and position ledger consistency, risk controls, and compliance/observability.
System DesignOnsite - FigmaMediumSoftware EngineerConvert Leveled Rich-Text Tokens into Nested Lists
Tests parsing a linear sequence of leveled tokens into a hierarchical tree or nested list structure using stack-based tree construction.
Coding & AlgorithmsOnsiteStackTreeAlgorithms - FigmaMediumSoftware EngineerDesign Permission-Aware Retrieval for Design Files
Design a permission-aware search and retrieval system for collaborative design files and assets that enforces hierarchical access control, supports hybrid search, and prevents data leakage.
System DesignOnsiteSearchAccess ControlVector Search - FigmaHardSoftware EngineerDesign a trending-articles platform
This question evaluates system design competence for building large-scale, near-real-time trending and feed systems, testing skills in streaming ingestion, event modeling, ranking algorithms, caching, consistency and fault-tolerance, capacity planning, and operational observability within the System Design domain.
System DesignOnsite - FigmaMediumSoftware EngineerDesign an Async Job Scheduler
This question evaluates a candidate's ability to design reliable, fault-tolerant asynchronous job scheduling systems, covering concepts such as immediate versus delayed execution, failure handling, retries, duplicate execution prevention, worker crashes, scheduler failover, and the feasibility of exactly-once semantics.
System DesignOnsite - FigmaMediumSoftware EngineerDesign an Evaluation Platform for a Design-Editing Agent
Design an automated, multimodal evaluation platform to benchmark and monitor a canvas-based design-editing agent across deterministic property updates and subjective creative directives.
ML System DesignOnsiteLLM EvaluationAgentsMultimodal AI - FigmaMediumSoftware EngineerValidate a Balanced INDENT and DEDENT Token Stream
Determine if a sequence of structural tokens maintains valid scoping rules—never closing an un-opened level and closing all levels by the end. Tests single-pass balance checking, edge-case handling for empty streams, and O(1) space optimization.
Coding & AlgorithmsOnsiteStackParsingState Machine - FlexportHardSoftware EngineerDesign Container Assignment with Incompatible Goods
Design a shipment-planning and container-packing service that assigns cargo items to ocean containers subject to physical dimensions, weight limits, and hazardous/incompatibility rules while supporting async workflows and plan approvals.
System DesignOnsiteDistributed SystemsOptimizationConcurrency - FlexportHardSoftware EngineerIdentify a Target Word with Repeated Minimax Guesses
This problem tests advanced search heuristics and state-space pruning by requiring the implementation of a Wordle-style feedback system that uses a minimax strategy to identify a secret word from a dictionary.
Coding & AlgorithmsOnsiteMinimaxHeuristicsPruning - FlexportHardSoftware EngineerMeasure Meeting Coverage and Required Rooms
This problem tests your ability to manipulate interval data, specifically calculating the total coverage area and finding the maximum concurrency using a sweep-line algorithm.
Coding & AlgorithmsOnsiteSortingSweep-lineIntervals - FluidstackEasySoftware EngineerDesign a Fair GPU Training Job Platform
Design a centralized scheduling and execution platform for one-off ML training jobs across a shared, heterogeneous GPU cluster, balancing fair resource sharing, multi-GPU network topology, and fault tolerance.
System DesignOnsiteGPU SchedulingDistributed SystemsML Infrastructure - Fora TravelEasySoftware EngineerDesign Caching for a Hotel Booking System
Design a high-throughput caching and inventory architecture for a hotel booking platform that accelerates read-heavy search traffic while strictly preventing overselling through temporary holds and authoritative consistency.
System DesignOnsitesystem-designcachingdistributed-systems - Fora TravelMediumSoftware EngineerDesign Emergency Notification System
This question evaluates system design and engineering competencies related to large-scale, real-time notification systems, including distributed systems architecture, messaging and delivery mechanisms, data modeling, API design, scalability, reliability, security, and monitoring.
System DesignOnsite - Fora TravelEasySoftware EngineerDesign a Hierarchical Learning Content API
Design a relational schema and REST API for a three-tiered learning curriculum (Tracks, Modules, Lessons) supporting drag-and-drop reordering, transactional updates, and versioned caching.
System DesignOnsiteAPI DesignData ModelingCaching - Fora TravelMediumSoftware EngineerMerge Sorted Arrays
This question evaluates competency in implementing and generalizing merge operations on sorted arrays, exercising algorithmic problem-solving, array manipulation, handling of edge cases (empty arrays, negative numbers, duplicates), and analysis of time and space complexity.
Coding & AlgorithmsOnsite - Fuse EnergyMediumSoftware EngineerDesign a Fitness Activity Tracking App with Followers and Leaderboards
Prepare for a Fuse Energy system design interview about design a fitness activity tracking app with followers and leaderboards. This question focuses on requirements, architecture, trade-offs, reliability, and follow-up discussion areas.
System DesignOnsite - GarminMediumSoftware EngineerValue on the Secondary Diagonal of a Center-Out Clockwise Spiral Matrix
A matrix coding question: an odd-sized square matrix is filled with a clockwise spiral that starts at the center cell, and you must return the number on its secondary diagonal a given number of rows above or below the middle row. It tests precise index arithmetic and reasoning about how the spiral grows outward ring by ring.
Coding & AlgorithmsOnsite - GeMediumSoftware EngineerMinimize total distance to a store
This pair of problems evaluates algorithmic problem-solving skills, focusing on spatial optimization with Manhattan distances for grid-based demand aggregation and sequential penalty minimization on binary time-series data, emphasizing reasoning about aggregation and trade-offs.
Coding & AlgorithmsOnsite
Dropbox
Expedia
Faire
Figma