Coinbase interview questions

Showing 91–99 of 99 results

• Present a Previous Project Deep DiveHard

  This question evaluates technical depth, architectural reasoning, leadership, and cross-team collaboration skills within frontend engineering, focusing on system/frontend architecture, tradeoff analysis, incident management, and measurable impact.

  CoinbaseFrontend EngineerBehavioral & LeadershipOnsite
• Resolve a Disagreement in Code ReviewMedium

  This question tests your ability to navigate technical conflict, exercise professional judgment, and demonstrate collaborative communication skills during a pull request review.

  CoinbaseSoftware EngineerBehavioral & LeadershipOnsite
• Schedule Fixed-Order Tasks with a CooldownMedium

  Calculate the total days required to run a sequence of tasks in a strict, fixed order where identical tasks must be separated by a specified cooldown period.

  CoinbaseSoftware EngineerCoding & AlgorithmsOnsite
• Select transactions to maximize fees under sizeMedium

  This problem tests your ability to solve a variation of the 0/1 Knapsack problem where items have both a cost (size) and a value (fee).

  CoinbaseSoftware EngineerCoding & AlgorithmsOnsite
• Solve Aptitude Test: Logical, Numerical, Verbal ReasoningMedium

  This question evaluates logical, numerical, and verbal reasoning along with rapid pattern recognition and time-limited decision-making relevant to pre-employment aptitude screens for data science roles.

  CoinbaseData ScientistCoding & AlgorithmsOnline Assessment
• Solve the 12-coin balance puzzleHard

  This question evaluates understanding of combinatorial reasoning, information theory, and decision-tree construction for identifying a single counterfeit coin and whether it is heavier or lighter using constrained balance-scale observations.

  CoinbaseData ScientistStatistics & MathTechnical Screen
• Write SQL and Python for funnels/retentionMedium

  This question evaluates SQL and Python data-manipulation skills, including event-to-session joins, temporal window filtering, deduplication, JSON metadata handling, and computation of funnel and retention metrics like daily unique users and conversion rates.

  CoinbaseData ScientistData Manipulation (SQL/Python)HR Screen
• Write SQL to rank top products per categoryMedium

  This question evaluates SQL proficiency in aggregation, time-based filtering, joining transactional and reference tables, and ranking/windowing techniques to compute and deterministically order product revenue with tie-breaking by product_id.

  CoinbaseMachine Learning EngineerCoding & AlgorithmsOnsite
• Write SQL: sum values ≤ each row’s valueMedium

  This question evaluates proficiency in SQL aggregation, query optimization, and handling duplicate values when computing cumulative sums across rows. It is commonly asked to assess practical ability in the Data Manipulation (SQL/Python) domain to design scalable, efficient queries and demonstrates a focus on practical application of query-design and optimization rather than purely conceptual theory.

  CoinbaseData ScientistData Manipulation (SQL/Python)Onsite