HubSpot interview questions

Showing 1–13 of 13 results

• Design a Netflix-like streaming platformHard

  A HubSpot software-engineer onsite system-design question: design a Netflix-like video streaming platform covering catalog browse by genre and curated rails (Recently Added, Top Ten), search, adaptive-bitrate playback across web, mobile and TV, cross-device resume, and an upload-to-streamable ingest pipeline. It evaluates service decomposition, data models and API contracts, transcoding and CMAF/multi-DRM packaging, CDN and caching strategy, session concurrency and consistency, multi-region failover, observability and A/B testing, graceful degradation, and cost control at millions of concurrent viewers. The worked solution sizes egress and heartbeat load, corrects the common concurrency, resume, and cache-TTL mistakes, and marks the MVP cut line.

  HubSpotSoftware EngineerSystem DesignOnsite
• Design a bank with scheduled payments and mergesMedium

  This question evaluates data-structure and algorithm design competencies with emphasis on concurrency, time-based scheduling, aggregation (TopK), transactional consistency, idempotency, and merge semantics for an in-memory banking service, falling under the Coding & Algorithms and system-design domain.

  HubSpotSoftware EngineerCoding & AlgorithmsOnline Assessment
• Design a near-real-time weather APIHard

  A HubSpot onsite system-design question: build a weather data platform that ingests hourly dumps for ~2,000 U.S. locations and serves the current temperature with an at-most-10-minute freshness SLA. It tests ingestion pipelines, idempotent retries and backfill, caching and invalidation, storage modeling, rate-limit handling, scaling, and observability on freshness SLOs.

  HubSpotSoftware EngineerSystem DesignOnsite
• Design an hourly weather crawling serviceEasy

  This question evaluates a candidate's ability to design scalable, reliable data ingestion and delivery systems, covering competencies such as scheduling and crawling, data normalization, storage schema design, idempotent ingestion, rate limiting, retries, and monitoring.

  HubSpotSoftware EngineerSystem DesignOnsite
• Design and implement a bank account systemMedium

  This question evaluates a candidate's skills in system design, data modeling, transactional integrity, concurrency control, idempotency, API design, and algorithmic complexity for implementing a minimal banking service.

  HubSpotSoftware EngineerCoding & AlgorithmsOnline Assessment
• Discuss compensation expectations and levelMedium

  This question evaluates a candidate's ability to articulate compensation expectations, total rewards understanding (base, bonus, equity, sign-on) and flexibility, along with professional communication and self-awareness, and is categorized under Behavioral & Leadership and HR screening for compensation negotiation.

  HubSpotMachine Learning EngineerBehavioral & LeadershipHR Screen
• Find a special person using knows(a,b)Easy

  This question evaluates algorithmic reasoning about pairwise relation inference using an oracle-style knows(a, b) API and the ability to minimize API calls, testing skills in graph modeling and asymptotic analysis.

  HubSpotSoftware EngineerCoding & AlgorithmsOnsite
• Find spammer with minimal hasMessaged callsMedium

  Find the "spammer" account that messaged every other account but received from none, using only a hasMessaged(a, b) oracle. This is the classic find-the-celebrity problem inverted, solved with a two-phase elimination-then-verify algorithm in O(n) oracle calls and O(1) extra space, with full correctness proof and edge-case handling.

  HubSpotSoftware EngineerCoding & AlgorithmsOnsite
• Implement account CRUD and transferMedium

  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 Implement account CRUD and transfer states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.

  HubSpotSoftware EngineerCoding & AlgorithmsOnline Assessment
• JavaScript Fundamentals: Prototype Chains and How 'this' Is BoundMedium

  A JavaScript fundamentals question that asks you to predict and explain how this is bound in method calls, detached calls, bound functions and arrow functions, trace property lookup through a prototype chain, and rewrite constructor-based inheritance with class syntax. It tests precise reasoning about core language behaviour.

  HubSpotFrontend EngineerSoftware Engineering FundamentalsOnsite
• Schedule and execute future paymentsMedium

  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 Schedule and execute future payments states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.

  HubSpotSoftware EngineerSystem DesignOnline Assessment
• Validate hiring request under role constraintsMedium

  This problem tests your ability to manage state mapping and validate cardinality constraints using hash maps, requiring efficient lookups to ensure hiring requests remain within predefined role limits.

  HubSpotSoftware EngineerCoding & AlgorithmsTechnical Screen
• Walk Me Through Your Current Job: Scope, Responsibilities and ImpactMedium

  A behavioral opener for senior software engineers that asks you to describe your current job and the role you play in it. It tests how clearly you convey product context, personal scope and ownership, measurable impact and fit with the role being interviewed for, and how well you set up the follow-up questions.

  HubSpotSoftware EngineerBehavioral & LeadershipOther