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Citigroup Software Engineer Interview Questions

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

50questions
~7htotal time
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1
CodingStart here. 28 questions · ~244 min
Cards Shuffle ProgramEasy
Practice

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

ProgrammingCitigroup
Binary Tree and String ReverseEasy
Practice

Use iterative binary search and two-pointer reversal to process a sorted Citigroup transaction list and a reference string.

string manipulationCitigroup
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2
SQL & Data Manipulation6 questions + 3 drills · ~82 min
SQL vs NoSQL for Go-to-Market DataEasy
Recently asked

Explain how SQL and NoSQL differ in schema, consistency, scaling, and Demandbase-style analytics use cases.

JoinsData WranglingCitigroup
Normalization and Indexing for ReadsMedium
Recently asked

Tests your database design skills for performance and data integrity under heavy read load.

indexingperformanceCitigroup
Top Customers by Region VolumeMedium
Practice
Practice drill

Find the top 3 customers in each region by transaction volume using joins, aggregation, and window ranking.

Window FunctionsJoinsRankingJPMorganChaseSilicon Valley BankNavi
Running Total and Customer RankingMedium
Practice
Practice drill

Use aggregation and window functions to calculate cumulative paid claims and rank Mutual of Omaha policyholders within each region.

Window FunctionsRankingRunning TotalsMutual of OmahaCostar GroupGoodyear
Top 3 Transactions Per CustomerMedium
Practice
Practice drill

Use CTEs and ROW_NUMBER to return each customer's top three posted Citi card transactions per month.

Window FunctionsRankingCTEsCitigroup
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3
System Design3 questions · ~26 min
High-Concurrency System DesignHard
Recently asked

Tests your system design skills for scalability, latency, and reliability under concurrent load.

system designdistributed systemsCitigroup
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4
Behavioral & Leadership9 questions · ~78 min
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5
More topics4 questions · ~35 min
CI/CD Pipeline for a New ServiceMedium
Recently asked

Tests your ability to automate build, test, and deployment for reliable software delivery at scale.

CI/CDCitigroup
Distributed Spring Batch Data OperationsHard

Evaluates design choices for correctness, throughput, and reliability in distributed batch processing.

Citigroup
Linux and Microservice InfrastructureMedium

Tests practical Linux skills for debugging and operating microservices.

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