Top 17
Prep plan
Updated weekly · Last refresh Oct 17

BlockFi Software Engineer Interview Questions

The questions to prepare for a BlockFi Software Engineer interview. Questions from real interview reports rank first. Updated daily.

17questions
~3htotal time
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1
System DesignStart here. 5 questions · ~45 min
Designing a Newsfeed SystemHard

Evaluates system design tradeoffs for feed generation, scalability, and performance.

social mediaBlockFi
General Systems Design ApproachMedium

Assesses your ability to structure requirements, tradeoffs, and architecture for a systems design task.

BlockFi
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2
Behavioral & Leadership4 questions · ~36 min
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3
More topics8 questions · ~72 min
Idempotent Recurring Posting PipelineHard

Design an idempotent recurring posting pipeline so payments are never applied twice.

OrchestrationIdempotencyQualityBlockFi
Dealing With Data Provider FlakinessHard

Evaluates reliability strategies for time-sensitive financial data ingestion and user-facing correctness.

BlockFi
Coding Fundamentals PracticeMedium

Assesses your readiness for common coding challenges relevant to BlockFi’s day-to-day engineering work.

technical skillsBlockFi
Optimistic vs Pessimistic LockingMedium

Tests understanding of concurrency control tradeoffs for ledger correctness and performance.

data integrityBlockFi
Networking FundamentalsMedium

Tests understanding of core networking protocols and how they relate to network behavior.

NetworkingprotocolsBlockFi
Optimize Blocking SQL QueryHard

Tests SQL performance tuning and strategies to reduce blocking in high-write transactional systems.

Performance Tuningtransactionsdata integrityBlockFi
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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
The finish line: interview-readyComplete all 17 questions plus 3 hands-on drills to finish this plan.