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Synchrony Financial Data Engineer Interview Questions

The questions to prepare for a Synchrony Financial Data Engineer interview. Questions from real interview reports rank first. Updated weekly.

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1
CodingStart here. 3 questions · ~28 min
Flatten Nested JSON PathsMedium
Practice

Flatten a deeply nested JSON-like object into path-value pairs using recursion and deterministic key construction.

Synchrony Financial
Efficient Duplicate DetectionMedium

Tests your approach to deduplication using scalable data structures and algorithms.

Arraysefficiencydata validationSynchrony Financial
Live Coding Under PressureHard

Evaluates problem-solving, coding execution, and composure under pressure.

Synchrony Financial
2
Behavioral & Leadership7 questions · ~66 min
Troubleshooting a High-Stakes Data IssueMedium

Tests ownership in diagnosing a data issue, communicating clearly under pressure, and driving a durable fix with measurable impact.

CommunicationOwnershipDealing With AmbiguitySynchrony Financial
Improving a Process With DataMedium

Tests ownership and influence through a concrete example of using metrics to diagnose a broken process and drive measurable change.

CommunicationLeadershipOwnershipSynchrony Financial
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3
More topics3 questions · ~28 min
Batch vs Streaming Data ProcessingEasy

Compare batch and streaming data processing, including when each fits best in a pipeline.

Stream ProcessingETLBatch ProcessingSynchrony Financial
Partitioning and IndexingHard

Tests your understanding of physical data design for performance and scalability in distributed systems.

indexingdistributed databasespartitioningSynchrony Financial
Optimizing Slow SQL QueriesHard

Tests your ability to diagnose and optimize SQL performance on large transactional datasets.

Performance Tuningquery optimizationsqlSynchrony Financial

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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Second Highest Without AggregatesHard
Practice
Recently asked
Practice drill

Find the second highest salary in each department without using aggregate functions.

SubqueriesRankingSelf-JoinsCredit GenieDevoteamCisco Restaurant + Bar
Employees Per Department QueryEasy
Practice
Practice drill

Use a LEFT JOIN and GROUP BY to count employees in every Auto-Owners Insurance department, including departments with zero employees.

JoinsData WranglingAggregationsAuto-Owners InsuranceSynchrony Financial
Top Users by Recent Transaction VolumeMedium
Practice
Practice drill

Find the top 3 users by completed transaction volume in the last 30 days using joins and aggregation.

Data Analysisquery optimizationsqlTTier 1 BankRevolutChime
The finish line: interview-readyComplete all 13 questions plus 3 hands-on drills to finish this plan.