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Prep plan
Updated weekly · Last refresh Aug 30

Wise. Energy Software Engineer Interview Questions

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

50questions
~8htotal time
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1
CodingStart here. 13 questions · ~119 min
Shortest Path in Currency GraphEasy
Practice
Recently asked

Use BFS to reconstruct the shortest directed currency conversion route in Wise. Energy's conversion graph.

shortest pathbfsGraphsWise. Energy
Sliding Window Max SubarrayEasy
Practice
Recently asked

Find the maximum sum of K consecutive energy readings using a fixed-size sliding window.

Basic AlgorithmsArraysSliding WindowWise. Energy
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2
Execution13 questions · ~119 min
Resilient Circuit Breaker for PaymentsMedium
Recently asked

Tests your ability to build fault-tolerant integrations and manage failures safely in production.

Technical FluencyWise. Energy
Real-Time Support Chat at ScaleHard
Recently asked

Tests your ability to design low-latency real-time systems and deployment strategies for large-scale clients.

Trade-offsRoadmappingScope ManagementWise. Energy
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3
SQL & Data Manipulation7 questions + 3 drills · ~94 min
Deadlock Prevention and LockingHard
Recently asked

Tests your understanding of concurrency control and your ability to avoid deadlocks under load.

performancetransactionsdata integrityWise. Energy
Top Corridors Weekly VolumeMedium
Recently asked

Tests your ability to write SQL for analytics over currency corridors with correct filtering and aggregation.

Date FunctionsCase WhenAggregationsWise. Energy
Compare Monthly User Retention CohortsMedium
Practice
Recently asked
Practice drill

Calculate month-1 retention for January vs February signup cohorts using joins, date filtering, and aggregation.

Window FunctionsDate FunctionsAggregationsTrideumZulilyeBay
7-Day Rolling Active UsersMedium
Practice
Practice drill

Compute daily active users and a 7-day rolling average using a CTE, distinct counts, and window functions.

Window FunctionsDate FunctionsRunning TotalsMetaSpotifyMeta IT
Retention Rate SQLHard
Practice
Practice drill

Calculate Wise Energy's 30-day user retention by signup cohort using a CTE, left join, date filtering, and conditional aggregation.

sql queryWise. Energy
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4
System Design12 questions · ~110 min
Scalable Rate Limiter DesignHard
Recently asked

Tests system design skills for high-throughput traffic control and multi-region scalability.

distributed trainingperformancecachingWise. Energy
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5
Behavioral & Leadership4 questions · ~37 min
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6
More topics1 question · ~9 min
Circuit Breaker Pattern ImplementationMedium

Evaluates resilience design and correct failure-window accounting.

failure managementWise. Energy
The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.