Top 2
Prep plan
Updated weekly · Last refresh Oct 17C
CI&T Backend Engineer Interview Questions
The questions to prepare for a CI&T Backend Engineer interview. Questions from real interview reports rank first. Updated daily.
2questions
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SQL & Data ManipulationStart here. 1 question + 3 drills · ~38 min
Explain ACID in Transaction SystemsEasy
Explain the four ACID properties and why they matter for reliable transaction processing in SQL systems.
acid propertiestransactionsdata integrityCCI&T
SQL Duplicate Record CleanupMedium
Practice
Practice drillIdentify duplicate transaction rows, retain the earliest record, and delete later duplicates safely.
deduplicationdata cleaningtransactions
Oracle
Amex
Brooksource
OracleAmexBrooksourceSCD Type 2 in WarehouseHard
Practice
Practice drillCreate versioned Roku customer and device records with effective timestamps and current-row indicators.
data managementtransactionsdata integrity
Roku
RokuDatabase Consistency Under ConcurrencyMedium
Practice
Practice drillAudit account balances against posted ledger entries using aggregation and NULL-safe balance calculations.
deadlocksacid propertiesdata integrity
Revolut
Revolut2
Behavioral & Leadership1 question · ~8 min
Taking the Lead on a ProjectEasy
Tests project leadership, ownership, prioritization, and influence through a specific STAR example.
achievementLeadershipbehavioral interviewCCI&T
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The finish line: interview-readyComplete all 2 questions plus 3 hands-on drills to finish this plan.