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Amazon Web Services Backend Engineer Interview Questions

The questions to prepare for a Amazon Web Services Backend Engineer interview. Questions from real interview reports rank first. Updated daily.

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1
CodingStart here. 20 questions · ~306 min
Compare Two Texts and Separate MatchesMedium
Practice

Partition two string lists into matching and unmatched occurrences using frequency counting.

ArraysArray ManipulationAlgorithmsAmazon Web Services
BST Lower Than ValueMedium
Practice

Find the greatest BST value strictly less than a target using an iterative tree search.

binary searchbstAlgorithmsAmazon Web Services
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2
System Design20 questions · ~306 min
Auction PlatformHard

Design an auction platform with scalable storage, low-latency bidding APIs, bid edits, caching, and a near real-time leaderboard.

low latencydistributed systemsdata streamsAmazon Web Services
Top K dynamic valuesHard

Design a practical data structure and serving approach for returning top K values without scanning every value per query.

latencydesigncomputational costAmazon Web Services
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3
Behavioral & Leadership6 questions · ~92 min
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4
More topics4 questions · ~61 min
Maximum Money in Consecutive BagsMedium
Practice
Recently asked

Calculate the maximum money in any K consecutive bags from continuous money segments.

CTEscalculationsAggregationsAmazon Web Services
Backend Banking App SecurityHard
Recently asked

Repair backend authorization so users access only their transactions while admins retain explicitly authorized account management access.

access controlapplication securityiamAmazon Web Services
Merge Overlapping IntervalsMedium

Implement a batch transformation that sorts intervals and merges every overlapping range efficiently.

data pipelinedata parsingData WranglingAmazon Web Services
Maximizing Money in Infinite BagsMedium
Practice
Recently asked

Find the highest-value consecutive bag segment for each financial input case.

Data Manipulationfinancial dataAggregationsAmazon Web Services

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Hands-on SQL practiceWrite and run real queries in the editor. 1 drill · ~10 min
Second and Nth Highest ValuesMedium
Practice
Recently asked
Practice drill

Find the second highest distinct salary and adapt the query to retrieve any requested salary rank.

Data Manipulationsqldatabase queryingSnowflake ComputingKKGISLSBS
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