Wonjun Jeong

Backend engineer specializing in scalable systems and reliable API design.

Republic of Korea

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Dev Battery

A technical journal on algorithms, backend architecture, and evidence-based software engineering.

[HackerRank] Tag Content Extractor

Tag Content Extractor

algorithms

HackerRank

2022-06-29

[HackerRank] Valid Username Regular Expression

Valid Username Regular Expression

algorithms

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2022-06-28

[HackerRank] Java Regex 2 - Duplicate Words

Java Regex 2 - Duplicate Words

algorithms

HackerRank

2022-06-27

[HackerRank] Java Factory Pattern

Java Factory Pattern

algorithms

HackerRank

2022-06-26

[HackerRank] Prime Checker

Prime Checker

algorithms

HackerRank

2022-06-25

[HackerRank] Java Lambda Expressions

Java Lambda Expressions

algorithms

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Wonjun Jeong

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[HackerRank] Tag Content Extractor

[HackerRank] Valid Username Regular Expression

[HackerRank] Java Regex 2 - Duplicate Words

[HackerRank] Java Factory Pattern

[HackerRank] Prime Checker

[HackerRank] Java Lambda Expressions

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