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Fundbox Software Engineer Interview Questions

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

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1
CodingStart here. 8 questions · ~76 min
Linked List ReversalEasy
Practice

Reverse a singly linked list in-place using iterative pointer manipulation.

RecursionLinked ListsArraysFundbox
Two Sum and Array AlgorithmsEasy
Practice

Find the lexicographically smallest pair of payment amounts reaching a target using a hash map in O(n) time.

system designleetcodeAlgorithmsFundbox
Synchronous vs Asynchronous ProgrammingMedium

Explain the differences between synchronous and asynchronous programming paradigms.

Fundbox
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2
Execution6 questions · ~57 min
Unit Testing ImportanceEasy

Tests your software quality mindset and how you use testing to reduce regressions.

ArraysIdempotencyQualityFundbox
Designing Distributed ApplicationsHard

Tests your ability to design for scalability, reliability, and consistency in distributed systems.

Trade-offsRisk AssessmentScope ManagementFundbox
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3
Behavioral & Leadership9 questions · ~86 min
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4
More topics3 questions · ~29 min
Consistency Across Service PipelinesMedium

Approach for keeping pipeline outputs consistent when multiple microservices publish overlapping, delayed, or duplicate data.

system designdata consistencymicroservicesFundbox
Design a Payment Authorization RankerHard

Design an ML based payment optimization system that scores and routes transactions to improve authorization, cost, and fraud outcomes.

Feature StoreModel ServingRecommendation SystemsFundbox
State Management in ReactMedium

Tests frontend architecture choices for predictable UI behavior and maintainability.

reactstate managementFundbox

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