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Updated weekly · Last refresh Sep 21

Citi Software Engineer Interview Questions

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

50questions
~9htotal time
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1
CodingStart here. 10 questions · ~108 min
Cards Shuffle ProgramEasy
Practice

Shuffle A.O. Smith service cards uniformly using the in-place Fisher-Yates algorithm and a reproducible random seed.

ProgrammingCiti
Two Sum in O(N)Easy
Practice

Find two payment entries summing to a target using a hash map in O(n) time.

two sumCiti
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2
SQL & Data Manipulation8 questions + 3 drills · ~116 min
Optimizing Slow SQL QueriesMedium

Tests your approach to diagnosing and improving SQL performance.

Citi
Fixing Slow SQL QueriesMedium
Practice
Practice drill

Write an optimized PostgreSQL query that aggregates qualifying Citi account transactions efficiently.

Performance Tuningdatabase optimizationindexesCiti
Advanced Data Modeling for PerformanceHard
Practice
Practice drill

Calculate Citi business-unit performance variance against targets and identify the largest shortfalls.

business problemdata managementtechnical experienceCiti
SQL for Options Average PriceEasy
Practice
Practice drill

Write a SQL query to find the average price of options traded in the last month. Use the previous calendar month relative to CURRENTDATE and exclude trade...

Date Functionsfinancial datasqlCiti
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3
Execution10 questions · ~108 min
Handling Critical Project FeedbackEasy

Explain how you respond to direct feedback or criticism while preserving relationships and keeping a finance project on track.

Trade-offsSuccess CriteriaRisk AssessmentCiti
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4
Security & Infrastructure4 questions · ~43 min
Spring Boot and Microservices ScenarioMedium

Evaluates ability to connect core Java runtime concepts to Spring and microservices architecture.

microservicesCiti
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5
System Design6 questions · ~65 min
Scalable Blockchain Event IndexerHard

Tests system design skills for high-throughput event indexing and scalable data access.

Citi
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6
Pipelines5 questions · ~54 min
Distributed Spring Batch Data OperationsHard

Evaluates your approach to correctness, idempotency, and consistency in distributed batch processing.

Batch ProcessingCiti
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7
More topics7 questions · ~75 min
Make a Java Class ImmutableMedium

Assesses understanding of immutability and its benefits for concurrency in banking systems.

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