During November 2024, Likespro contributed to the Hardvan/Java repository by developing a performance-optimized implementation of Dijkstra’s shortest path algorithm. Leveraging Java and advanced data structures, Likespro replaced the naive approach with a TreeSet-based priority queue, enabling more efficient vertex selection and improved scalability for large graphs. The work included implementing the core algorithm logic and designing comprehensive unit tests to validate correctness across diverse graph scenarios. This feature-driven effort focused on algorithm optimization and reliability, with thorough documentation updates and no major bugs addressed. The depth of the contribution reflects strong skills in Java development, graph algorithms, and unit testing.