Dataford
Top 45
Prep plan
Updated weekly · Last refresh Sep 26

Kraken Backend Engineer Interview Questions

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

45questions
~6htotal time
Track your progressSign up free to work through all 45 questions and resume where you left off.
Start practicing free →
1
CodingStart here. 3 questions · ~24 min
Maintainable Code Design PracticesEasy

Explain how to write maintainable code using clear abstractions, small functions, tests, and documentation.

RecursionHash TablesArraysKraken
More Coding questions with a free account
2
System Design15 questions · ~121 min
Refactor for 10x TrafficHard

Tests system refactoring skills for major load growth while preserving reliability.

refactoringperformanceKraken
API Versioning in Rapid ChangeMedium

Tests how you maintain backward compatibility while iterating quickly on APIs.

Kraken
More System Design questions with a free account
3
Execution6 questions · ~49 min
Django Performance BottlenecksMedium

Evaluates diagnosing and mitigating performance issues in a Django backend.

performancebottlenecksKraken
More Execution questions with a free account
4
Behavioral & Leadership17 questions · ~138 min
More Behavioral & Leadership questions with a free account
5
More topics4 questions · ~32 min
Unknown Column Definitions in D0010Medium

Assesses your approach to interpreting messy data schemas and ensuring correct downstream processing.

Kraken
API Security Best PracticesMedium

Evaluates knowledge of securing APIs, including auth, validation, and threat mitigation.

best practicesSecurityapi securityKraken
Optimize Energy Data PipelinesHard

Tests your ability to improve pipeline performance and reliability for energy-related analytics.

data pipelinesoptimizationKraken
Data Integrity for CSV/JSONMedium

Assesses strategies for validating, cleaning, and protecting data integrity during ingestion.

data integrityKraken

Sign up to see every question

Create a free account to unlock this list and practice real interview questions.

Get my prep plan
Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Detect Overlapping Subscription PeriodsHard
Practice
Practice drill

Find overlapping subscription periods for each customer account using window functions and date comparisons.

Window FunctionsDate FunctionsSelf-JoinsRipplingKraken
Peak Consumption Per HouseholdMedium
Practice
Practice drill

Find each household's highest-consumption hour during a 30-day period using timestamp filtering and aggregation.

Date FunctionsGroup BysqlKraken
SQL Query ReviewHard
Practice
Practice drill

Identify performance, security, and SQL anti-patterns in a Mercury payment query and propose a safe executable revision.

database optimizationJoinsperformanceMercury
The finish line: interview-readyComplete all 45 questions plus 3 hands-on drills to finish this plan.