During January 2025, this developer contributed to the GDG-IGDTUW/DSA-1 repository by delivering three Java-based features focused on algorithms and data structures. They implemented a leaderboard-style ranking system for Relative Ranks, enabling analytics-ready score ordering, and developed Car Fleet, which models fleet formation to support routing and traffic analysis. Additionally, they built a Sort Characters By Frequency utility, providing frequency-based text processing for analytics and UI optimization. Their work involved applying heap structures and algorithmic techniques, and they addressed a refactor-induced issue to maintain feature stability. The contributions reflect depth in Java, algorithms, and data structure implementation.