Top 31

Prep plan

Updated weekly · Last refresh Aug 30

Konfío Software Engineer Interview Questions

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

31questions

~5htotal time

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1

CodingStart here. 13 questions · ~115 min

Linked List ReversalEasy

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

RecursionLinked ListsArrays

Implement Binary SearchEasy

Tests algorithm implementation skills and correctness reasoning.

RecursionArraysSearching

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2

Execution5 questions · ~44 min

Scalable and Maintainable Solution ExecutionEasy

Explain how you plan for scalability and maintainability up front, including trade-offs, success criteria, and risk management.

InfrastructureTrade-offsRisk Assessment

Konfío

Debugging Intermittent FailuresMedium

Tests incident-style debugging, observability, and hypothesis-driven troubleshooting.

Rollback PlanTrade-offsRisk Assessment

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3

Behavioral & Leadership9 questions · ~80 min

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4

More topics4 questions · ~35 min

Data Quality in ETL PipelinesEasy

Approach for maintaining data quality and integrity across ETL pipelines.

IdempotencyData ModelingQuality

System Design for Small BusinessesHard

Tests end-to-end system design for a high-impact fintech use case including reliability and scalability.

ML RankingRetrievalRecommendation Systems

Konfío

SQL vs NoSQL DifferencesMedium

Tests understanding of data storage trade-offs and when to choose different database paradigms.

nosqlsql

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AWS Logging for DebuggingMedium

Tests your practical knowledge of AWS logging and debugging workflows.

aws

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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min

SQL Sort QueryEasy

Sort Thales Ground Master radar readings by signal strength in ascending order, placing unknown values last.

Second Highest Trader SalaryEasy

Find the second highest distinct salary from a single table using basic PostgreSQL ordering and limiting.

SubqueriesRankingSorting

Spectraforce Technologies

SQL Top N QueryEasy

Return the 10 most-viewed active California physician profiles using WHERE, ORDER BY, and LIMIT.

RankingSortingAggregations

The finish line: interview-readyComplete all 31 questions plus 3 hands-on drills to finish this plan.