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Updated weekly · Last refresh Aug 30

Remitly Software Engineer Interview Questions

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

50questions
~7htotal time
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1
CodingStart here. 26 questions · ~218 min
O(1) Insert Delete Random SetEasy
Practice

Implement a set-like structure using an array and hash map to support insert, delete, and random access in average O(1) time.

Hash TablesArraysData StructuresRemitly
Fraud Detection with Sliding WindowsHard

Tests designing efficient streaming logic for fraud signals using time-windowed analysis.

Stream ProcessingSliding WindowtransactionsRemitly
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2
System Design7 questions · ~59 min
Design a URL Shortening ServiceHard

Design a URL shortening service that routes, ranks, and monitors links at scale.

Feature StoreModel ServingRemitly
Concurrent Ledger Balance UpdatesHard

Tests system design for correctness and concurrency in a ledger handling real-time payment flows.

system designtransactionsdata integrityRemitly
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3
Execution5 questions · ~42 min
Scale Rate Limiting Against DDoSHard

Tests ability to design scalable protections for payment APIs under adversarial traffic.

Trade-offsExecutionRisk AssessmentRemitly
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4
SQL & Data Manipulation3 questions + 3 drills · ~55 min
5
Behavioral & Leadership7 questions · ~59 min
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6
More topics2 questions · ~17 min
Global Payment Receiver IntegrationsHard

Tests designing resilient integration pipelines for international payments across heterogeneous providers.

InfrastructureAPIsDependenciesRemitly
Real-Time Notifications with OrderingHard

Tests distributed systems design for high-throughput messaging with ordering guarantees.

Stream ProcessingOrchestrationQualityRemitly
The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.