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Top 21
Prep plan
Updated weekly · Last refresh Aug 30

Securly Software Engineer Interview Questions

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

21questions
~4htotal time
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1
CodingStart here. 9 questions · ~96 min
Reverse a Linked ListEasy
Practice

Reverse a singly linked list in place using pointer manipulation.

RecursionLinked ListsSecurly
First Non-Repeating CharacterEasy
Practice

Find the first non-repeating character in a string using frequency counting and a second pass in O(n) time.

Hash TablesStringsSearchingSecurly
HCF and LCM CodingEasy
Practice

Compute two integers' HCF and LCM using the Euclidean algorithm and a multiplication identity.

AlgorithmsSecurly
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2
System Design3 questions · ~32 min
Load Balancer in Distributed SystemsMedium

Tests understanding of distributed system traffic distribution and reliability concepts.

distributed systemsload balancingSecurly
AWS for High-Traffic SystemsHard

Assesses system design decisions for scalability, availability, and performance on AWS.

awsSecurly
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3
Behavioral & Leadership6 questions · ~64 min
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4
More topics3 questions · ~32 min
Database Indexing for PerformanceMedium

Tests your ability to optimize SQL performance through indexing strategies and query planning.

indexingperformancesqlSecurly
DNS Proxy and Browser ExtensionsMedium

Assesses hands-on experience across networking, browser tooling, and backend APIs.

web technologiesSecurly
SQL Coding ScenarioHard

Tests SQL problem solving and ability to translate requirements into correct queries.

sqlAlgorithmsSecurly
Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Top Models Per Asset ClassEasy
Practice
Practice drill

Rank Balyasny research models by average return within each asset class using DENSE_RANK and aggregation.

performancesqlBalyasny Asset Management
SQL for Student Subject TotalsEasy
Practice
Practice drill

Use a join, SUM, GROUP BY, and HAVING to find students whose combined subject scores exceed 200.

sqlawsAmerican Airlines
Rank Top Service CategoriesEasy
Practice
Practice drill

Use RANK() and grouped revenue to find ServiceTitan's top three service categories in each region.

RankingperformancesqlServiceTitan
The finish line: interview-readyComplete all 21 questions plus 3 hands-on drills to finish this plan.