Jiun developed three algorithmic features for the DaleStudy/leetcode-study repository over two months, focusing on efficient problem-solving and code maintainability. He implemented hash-map-based solutions for the Contains Duplicate and Two Sum problems, optimizing for O(n) time and space complexity, and refactored directory structures for clarity. In August, Jiun delivered a Python-based string anagram detection feature, using character-count comparison and input validation to ensure correctness and performance. Throughout, he demonstrated strong skills in Python, data structures, and string manipulation, producing concise, testable code. His work emphasized clean engineering practices, incremental refactoring, and robust feature delivery without reported bugs.