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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 4891–4920 of 5874 results
- Sesame AiMediumSoftware EngineerSummarize Transcript Events in a Sliding Window
This problem tests your ability to maintain window-based statistics using an efficient data structure, specifically focusing on tracking counts of distinct elements and the maximum value in a sliding window.
Coding & AlgorithmsTechnical ScreenSliding WindowHash MapMonotonic Deque - SheinMediumSoftware EngineerSolve array modulo and parentheses tasks
This question evaluates proficiency in modular arithmetic and subarray-sum reasoning for remainder counting, together with string manipulation and parentheses-balancing competencies, testing algorithmic problem-solving, correctness justification, and implementation skills in the Coding & Algorithms domain.
Coding & AlgorithmsOnsite - Shield AiEasySoftware EngineerCount Pairs with the Minimum Absolute Difference
This problem tests the ability to efficiently find the minimum absolute difference between elements in an array and count the number of pairs that achieve this difference using combinatorial counting.
Coding & AlgorithmsTechnical ScreenSortingArraysCombinatorics - Shield AiEasySoftware EngineerExplain How You Would Test a System
This question evaluates your ability to design a comprehensive testing strategy for a distributed system, focusing on reliability, observability, and failure modes.
Software Engineering FundamentalsTechnical ScreenTesting StrategySystem DesignReliability - ShopifyMediumSoftware EngineerBank Account Simulation Class With Self-Written Tests at 90% Coverage
A pair-programming exercise: implement a class that simulates bank account operations, write your own tests reaching at least 90% coverage, and then extend the working code with a new requirement. It tests invariant-driven validation, all-or-nothing transfers, meaningful test design, and clean incremental changes.
Software Engineering FundamentalsTechnical Screen - ShopifyMediumSoftware EngineerDesign a Product Photography Upload Service
Design a product-photography workflow from shoot creation and direct upload through processing, merchant review, acceptance, and reshoots. Cover scoped upload authorization, authoritative metadata, idempotent state transitions, stale completion events, notifications, retention, and publication safety.
System DesignOnsite - ShopifyEasySoftware EngineerDesign a Robot Operations CLI
Implement a modular robot controller for a 2D warehouse grid that processes command sequences, enforces boundary and obstacle rules, and returns a detailed execution report.
Software Engineering FundamentalsTechnical ScreenSoftware EngineeringCLI DesignSimulation - ShopifyHardSoftware EngineerDesign a rare-book lending and returns system
Design a rare-book lending and returns system 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 - ShopifyMediumSoftware EngineerEngineering Manager Career Story: Team Impact, Quality Bar and Performance Management
A behavioral round for engineering managers that asks you to tell your management story through concrete examples. It tests the impact you drove through teams, how you kept the engineering quality bar high under pressure, how you handled underperformance, and how you grew people into larger roles.
Behavioral & LeadershipOnsite - ShopifyMediumSoftware EngineerExplain background, motivations, and stakeholder handling
This question evaluates communication, leadership, stakeholder management, career narrative construction, and compensation/logistics transparency, with emphasis on concise self-presentation, project impact articulation, cross-functional collaboration, and cultural alignment for a software engineering role.
Behavioral & LeadershipHR Screen - ShopifyMediumSoftware EngineerGrid Robot Command Simulator
Implement a 2D grid simulation for an automated warehouse robot executing movement and rotation commands while respecting boundaries and obstacles.
Coding & AlgorithmsTechnical Screensimulationarrayshash-table - ShopifyMediumSoftware EngineerHarden a URL-Caching HTTP Service for Production
This problem tests the ability to scale and harden a simple in-memory cache service, focusing on operational stability, concurrency control, and safe deployment patterns.
Software Engineering FundamentalsTechnical ScreenSystem DesignCachingConcurrency - ShopifyEasySoftware EngineerHow would you improve AI-generated code?
This question evaluates software engineering competencies such as code review, correctness and edge-case reasoning, API design and readability, test strategy, maintainability and extensibility, and performance and failure-mode analysis within the Software Engineering Fundamentals domain.
Software Engineering FundamentalsTechnical Screen - ShopifyEasySoftware EngineerImplement a multi-rover Mars controller
This question evaluates a candidate's ability to implement stateful command parsing, entity management for multiple rovers, and collision-avoidance on an unbounded 2D grid, emphasizing deterministic simulation, input/output specification, and robust handling of invalid operations.
Coding & AlgorithmsTechnical Screen - ShopifyMediumSoftware EngineerImplement an In-Memory File System
Implement an in-memory file system with absolute and relative path resolution, sorted listing, directory changes, creation, and removal. Enforce deterministic error codes, atomic validation, recursive deletion rules, and protection for the current directory and its ancestors.
Coding & AlgorithmsOnsite - ShopifyEasySoftware EngineerImplement cache and gift assignment system
This two-part exercise evaluates a candidate's competence in designing efficient in-memory data structures with correct eviction semantics (bounded LRU cache with amortized O(1) operations) and in implementing randomized permutation algorithms and input/output handling for derangement-based Secret Santa assignments from CSV input.
Coding & AlgorithmsTechnical Screen - ShopifyMediumSoftware EngineerParse a CSV and Generate a Gift Exchange
This problem tests string parsing, data validation, and algorithm design by requiring the implementation of a secret-santa style matching system from unstructured CSV data.
Software Engineering FundamentalsTechnical ScreenParsingAlgorithmsRandomization - ShopifyMediumSoftware EngineerScaling a Collision-Free Rover Fleet to a Million Robots
This question tests the ability to design a distributed system that manages real-time state consistency across a massive, sharded spatial grid while handling concurrency and robot movement.
System DesignTechnical ScreenDistributed SystemsConcurrencySharding - ShopifyEasySoftware EngineerSimulate rover movement on a grid
This question evaluates incremental system design, agent state management on a bounded grid, and algorithmic complexity for processing movement commands in the Coding & Algorithms domain.
Coding & AlgorithmsTechnical Screen - ShopifyMediumSoftware EngineerTechnical Deep Dive: Present a System You Built as a Design Retrospective
A senior engineering interview round in which you present a system you designed or led, using a diagram prepared in advance, and then defend it under questioning. It tests how you frame the problem and your ownership, explain key decisions and their alternatives, discuss failures honestly, and go deep on any component.
System DesignOnsite - ShopifyMediumSoftware EngineerTerminal-Controlled Grid Rover Simulator
Implement a warehouse rover simulation engine that processes sequential movement commands on a bounded 2D grid, handling coordinate translations, cardinal rotations, boundary limits, and multi-rover collision avoidance.
Coding & AlgorithmsTechnical Screensimulationstate-machinearrays - SierraMediumSoftware EngineerConversation Agent History: Paginated Fetching, Then Token-Limit Compaction
Build the message-history layer of a conversation agent: fetch the conversation page by page into one ordered list, then compact it whenever the total token count exceeds a limit by dropping the oldest messages. It tests pagination termination and ordering, running totals, and cheap removal from the front.
Software Engineering FundamentalsTechnical Screen - SierraMediumSoftware EngineerDesign an LLM-Powered Customer Service Chat System with Robust Failure Handling
A system design interview for a customer-service chat system whose replies come from an external LLM provider. It walks through the end-to-end happy path and publish/subscribe message delivery, then focuses on error handling when the provider partially fails or the network drops, on both the server and the client.
System DesignOnsite - SierraMediumSoftware EngineerFetch Every Page from a Data API, Then Compact Records to a Token Budget
A two-part coding screen: page through a data API until it returns no more records, then, if the fetched records exceed 20,000 tokens, compact them to at most 10,000 tokens by keeping the longest contiguous run that fits. It tests loop termination, failure handling, boundary rules and an efficient way to trim data to a budget.
Software Engineering FundamentalsTechnical Screen - SierraMediumSoftware EngineerLoad a Support Chat Transcript by Pages, Then Trim to a Token Budget
Build the transcript-loading layer for a customer support chat agent: assemble a full conversation from a paginated backend into one ordered list, then trim it down whenever it grows past a token budget by dropping the oldest turns first.
Software Engineering FundamentalsTechnical Screenpaginationdata-structuresapi-design - SierraMediumSoftware EngineerPaginate an Audit-Log API, Then Compact Entries to a Byte Budget
Pull every entry out of a cursor-paginated audit-log API, then, if the entries together exceed a byte budget, keep the longest contiguous run of them (in original order) that fits. Tests correct pagination loop termination and an efficient two-pointer scan instead of re-measuring every candidate run from scratch.
Software Engineering FundamentalsTechnical Screensliding-windowpaginationapi-design - SierraHardSoftware EngineerSplit Markdown Into Header-Aware Chunks
This question evaluates string parsing, stateful text-processing, and algorithmic chunking skills, focusing on hierarchical header tracking and enforcing size constraints while preserving document order.
Coding & AlgorithmsTechnical Screen - SigmacomputingMediumSoftware EngineerBuild a Pivot Table Aggregator
This question evaluates a candidate's ability to implement data aggregation and efficient lookup structures, focusing on grouping, associative aggregations, and maintaining intermediate state for derived metrics.
Coding & AlgorithmsTechnical Screen - SigmacomputingMediumSoftware EngineerBuild a pivot table class over shirt sales records with running and grand totals
Implement a class that stores shirt sales records and builds pivot tables summing shirts sold by any row field and column field, then extend it with running totals and grand totals along both axes. It tests object-oriented structure, aggregation with dictionaries, deterministic layout, and consistency between cells and totals.
Software Engineering FundamentalsTechnical Screen - SigmacomputingMediumSoftware EngineerEvaluate a Formula AST with Variables
This problem tests tree traversal techniques, recursive evaluation, and the implementation of short-circuit logic in expression trees containing variables.
Coding & AlgorithmsOnsiteTreesRecursionAST
Shopify
Sierra