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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 4531–4560 of 5874 results
- RedditMediumSoftware EngineerExplain How You Use AI in Engineering Work
Prepare a concrete account of using AI in engineering, including what you delegated, what information you withheld, and how you verified or rejected its output. Discuss correctness, privacy, licensing, maintainability, and continued human accountability.
Behavioral & LeadershipTechnical Screen - RedditMediumSoftware EngineerFind a Word Along One Fixed Direction in a Grid
Search a letter grid for a word along one fixed direction, with explicit diagonal rules, boundaries, and rejection of paths that turn.
Coding & AlgorithmsTechnical Screen - RedditMediumSoftware EngineerFind word sequence with 1–2 char changes
This question evaluates graph traversal and shortest-path search skills, specifically reasoning about BFS vs DFS, string transformation modeling, and algorithmic time/space complexity within the Coding & Algorithms domain.
Coding & AlgorithmsTechnical Screen - RedditMediumSoftware EngineerImplement a Stateful Chatter Message Store
Design and implement an in-memory message store supporting batch appends, contextual neighborhood queries, text editing with history tracking, and interval merging for read operations.
Software Engineering FundamentalsTechnical Screendata-structuresdesignbinary-search - RedditMediumSoftware EngineerImplement a sliding-window rate limiter
This problem tests your ability to design a rate-limiting algorithm that calculates traffic volume within a sliding time window to prevent API abuse.
Coding & AlgorithmsOnsiteHash MapSliding WindowRate Limiting - RedditMediumSoftware EngineerMerge Message Context Windows
This problem tests your ability to merge overlapping intervals efficiently using sorting and greedy techniques, a foundational skill for data reconciliation tasks.
Coding & AlgorithmsOnsiteIntervalsSortingGreedy - RedditMediumSoftware EngineerModerator System with Ranking, Communities, and Demotion
Design and implement an in-memory moderator management system supporting community-specific hierarchies, seniority-based permissions, and rank mutations.
Coding & AlgorithmsTechnical ScreenDesignHash TableLinked List - ReevoMediumSoftware EngineerCheck strings against dictionary efficiently
This question evaluates skills in efficient membership testing for large datasets, memory-time trade-offs in data structures, and string handling concerns such as case sensitivity and Unicode normalization.
Coding & AlgorithmsOnline Assessment - ReevoMediumSoftware EngineerCount all palindromic substrings
This question evaluates proficiency with string algorithms and algorithmic problem-solving, focusing on palindrome detection and counting contiguous substrings. It is commonly asked to assess implementation skills and the ability to reason about time and space complexity within the Coding & Algorithms domain, emphasizing practical application rather than purely conceptual understanding.
Coding & AlgorithmsOnline Assessment - ReevoMediumSoftware EngineerFetch and aggregate paginated team data via API
This question evaluates API integration, pagination handling, robust error handling (retries/backoff and rate-limit awareness), data aggregation, sorting and top‑N selection skills within the Data Manipulation (SQL/Python) domain.
Data Manipulation (SQL/Python)Online Assessment - Reinforce LabsMediumSoftware EngineerCompute minimum added stones to balance a tree
This problem tests tree traversal techniques and greedy aggregation, requiring you to determine the minimum number of 'stones' needed to equalize all subtree sums to match a target value.
Coding & AlgorithmsOnline AssessmentTreesGreedyRecursion - Reinforce LabsMediumSoftware EngineerWrite SQL to compute current product stock
This problem tests the ability to calculate current stock levels by aggregating historical transaction events against an initial inventory baseline using SQL joins and window functions.
Software Engineering FundamentalsOnline AssessmentSQLAggregationsJoins - RemitlyMediumSoftware EngineerBehavioral Screen: Going Beyond Your Responsibility and a Time You Failed
Two behavioral questions from a software engineering technical screen: describe a time you went beyond your responsibility, and describe a time you failed. They test ownership, judgment about stepping outside your scope, candor about your own mistakes, and whether the lessons you learned changed your later behavior.
Behavioral & LeadershipTechnical Screen - RemitlyEasySoftware EngineerCompute transfers to balance account debts
This question evaluates a candidate's ability to convert per-account net balances into a set of transfers, testing algorithmic problem solving, data-structure manipulation, and correctness under conservation invariants in transactional systems.
Coding & AlgorithmsTechnical Screen - RemitlyEasySoftware EngineerDescribe how you prevent project delays
This question evaluates a candidate's project management, leadership, risk mitigation, communication, and adaptability skills by probing methods for preventing delays and examples of changing approaches to complete work.
Behavioral & LeadershipTechnical Screen - RemitlyHardSoftware EngineerDesign a Production-Ready URL Shortener
This question evaluates competency in designing a scalable, reliable, and secure production URL shortening service, covering API design, link data modeling and analytics, ID/token generation, caching and read/write paths, partitioning/replication/consistency choices, rate limiting and abuse mitigation, TTL handling and cleanup, and HA/DR and monitoring. Commonly asked in system design interviews to probe architectural trade-offs for high-read consumer services, it belongs to the System Design domain and emphasizes practical application of distributed systems and operational concepts rather than only conceptual theory.
System DesignOnsite - RemitlyMediumSoftware EngineerDesign an Elevator System and Scheduler
This question evaluates a candidate's object-oriented design and algorithmic scheduling competencies, focusing on concurrency control, fault tolerance, queue management, tie-breaking rules, and time/space complexity analysis within an elevator control system.
Coding & AlgorithmsOnsite - RemitlyEasySoftware EngineerDesign an IP Address Filtering Service
Design a low-latency service that allows or denies traffic using source or destination IP rules. Candidates must define conflict precedence, address normalization, versioned rollout, stale-state behavior, audit evidence, privacy-conscious logging, and safe rollback.
System DesignOnsite - RemitlyEasySoftware EngineerHow to prepare for a PM partnership round
This question evaluates a software engineer's competency in cross-functional collaboration, communication with product managers, stakeholder alignment, prioritization, and trade-off reasoning when working with Product, Design, Data, QA, and other engineering teams.
Behavioral & LeadershipTechnical Screen - RemitlyMediumSoftware EngineerSolve k-Nearest Places by Latitude/Longitude
This question evaluates geospatial algorithm and systems-design competencies, focusing on nearest-neighbor search, great-circle distance computation, spatial indexing, and runtime/memory trade-offs for scalable location queries.
Coding & AlgorithmsOnsite - RemitlyMediumSoftware EngineerValidate a Bijective Substitution Cipher
Determine whether two printable ASCII strings form a valid one-to-one and onto (bijective) character substitution mapping.
Coding & AlgorithmsOnsiteHash TableStringAlgorithms - RemitlyHardSoftware EngineerWhiteboard and Deep Dive a Past Project
This question evaluates a candidate's end-to-end system design skills, including architecture decomposition, trade-off analysis, data consistency choices, scalability and resiliency patterns, and integration of operational practices for a user-facing distributed service.
System DesignOnsite - RenderMediumSoftware EngineerCount Blocked Rate-Limited Requests
This question evaluates understanding of rate-limiting logic, sliding-window time-based counting, and data structure design for tracking per-IP and per-(IP, host) request histories.
Coding & AlgorithmsTechnical Screen - RenderMediumSoftware EngineerFind the Five Busiest Client IPs in Request Logs
Aggregate completed HTTP request logs across files to find the top five client IPv4 addresses, excluding auxiliary messages and applying deterministic count ties.
Coding & AlgorithmsTechnical Screen - RenderMediumSoftware EngineerRate Limit an API During a Traffic Attack
Design API rate limiting with token buckets, layered identities, endpoint costs, distributed-state tradeoffs, and measurable protection of legitimate traffic.
System DesignTechnical Screen - ReplitMediumSoftware EngineerDesign a Multi-Channel Notification System
Design a resilient, multi-channel notification service that routes notifications across in-app, email, SMS, and push channels while honoring user preferences, idempotency, rate limits, and provider status tracking.
System DesignOnsiteDistributed SystemsMessage QueuesAPI Design - Resolve.AiMediumSoftware EngineerDesign a Weighted Log Distributor
This question tests your ability to design a distributed system that routes incoming log streams to multiple storage clusters based on specified weight configurations while ensuring high availability and fault tolerance.
System DesignOnline AssessmentLoad BalancingDistributed SystemsData Pipelines - Retell AIMediumSoftware EngineerConnect a Local FastAPI Service to an AI Agent Platform to Save and Read Back Issues
A live coding exercise on connecting a local Python FastAPI service to a hosted conversational AI agent platform so the agent can save issues a user reports and read past issues back during a conversation. It tests tool and endpoint design, making a local server reachable, user identification, speech-friendly responses and failure handling.
Software Engineering FundamentalsTechnical Screen - Retell AIEasySoftware EngineerDescribe a Time You Explained a Complex Technical Concept to Non-Technical People
A behavioral question for a customer-facing engineering role: describe one specific time you explained a complex technical concept to a non-technical audience and how you approached it. Tests STAR storytelling, audience analysis, accurate analogies and how the candidate checks that the message landed.
Behavioral & LeadershipHR Screen - Retell AIHardSoftware EngineerDesign a Cloud Call-Center Platform for Programmatic Outbound Calls
This question evaluates a candidate's ability to design a distributed, asynchronous system under hard external rate and capacity constraints. It tests system design fundamentals such as queueing, backpressure, state-machine modeling, and multi-tenant fairness, commonly asked to assess architectural reasoning at a practical, applied level rather than pure theory.
System DesignTechnical Screen
Reddit
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