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Updated weekly · Last refresh Sep 9

Jellyfish Software Engineer Interview Questions

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

33questions
~5htotal time
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1
CodingStart here. 8 questions · ~71 min
Reverse String In PlaceEasy
Practice

Reverse a string using a two-pointer approach by converting it to a mutable character list in Python.

CodingStringsProgrammingJellyfish
Implement Binary SearchEasy

Tests algorithm implementation skills and correctness reasoning.

RecursionArraysSearchingJellyfish
Multiple Priority Queues OperationsMedium

Tests your data structure design and algorithmic efficiency for queue operations.

Data StructuresJellyfish
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2
Execution9 questions · ~79 min
Discuss Cloud Infrastructure ExecutionEasy

Explain your cloud technology experience through execution choices, risk management, trade-offs, and measurable outcomes.

InfrastructureTrade-offsJellyfish
Keep Skills Up to DateEasy

Tests learning mindset and how you stay current with relevant technologies for software engineering.

RoadmappingRisk AssessmentScope ManagementJellyfish
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3
Behavioral & Leadership13 questions · ~115 min
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4
More topics3 questions · ~26 min
Basic Java, DBMS, and NetworkingMedium

Assesses core software engineering fundamentals relevant to building platform integrations.

javaNetworkingJellyfish
Social Media Database SchemaMedium

Tests your ability to model entities, relationships, and query needs in a real product.

JoinsData WranglingAggregationsJellyfish
Relational vs NoSQL DatabasesEasy

Tests understanding of data modeling trade-offs and when to use SQL vs NoSQL.

JoinsData WranglingAggregationsJellyfish
Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Second-Highest Client Transaction AmountMedium
Practice
Practice drill

Use a CTE, join, and dense ranking to return each client's second-highest distinct transaction amount.

Window FunctionsSubqueriesRankingThe AmeripriseTata Consultancy Services (North America)Wells Fargo
Detect Consecutive Losing StreaksMedium
Practice
Practice drill

Identify bet365 users with consecutive losing bets above a risk threshold using ordered streak grouping.

abuse trackingData Manipulationsql querybet365
Monthly Sales Trends by CategoryMedium
Practice
Practice drill

Aggregate monthly sales by product category and use LAG to calculate month-over-month changes.

InfrastructureToolsData WranglingTotal Wine & MoreInc.Benjamin Moore
The finish line: interview-readyComplete all 33 questions plus 3 hands-on drills to finish this plan.