Developed and expanded the DaleStudy/leetcode-study repository by building a reusable LeetCode Algorithm Solutions Library focused on core algorithmic challenges. Delivered four new features over two months, implementing solutions for problems such as contains-duplicate, Two Sum, Top K Frequent Elements, House Robber, Valid Anagram, Climbing Stairs, and Product of Array Except Self. Emphasized maintainable module structure and commit-driven feature delivery, enabling efficient onboarding and future contributions. Leveraged JavaScript, data structures, and dynamic programming to create memory-efficient, scalable solutions. Consolidated problem-solving patterns into a single library, enhancing code reuse and accelerating the development of algorithmic solutions without introducing bugs.