Delivered a major Core Algorithmic Utilities upgrade and expanded problem-solving capabilities for DaleStudy/leetcode-study. Key features include new data validation checks, frequency analysis, sequence detection, and a suite of dynamic programming and combinatorial solvers. Implemented multiple algorithm solutions across common LeetCode patterns (top-k frequent elements, longest consecutive sequence, 3Sum/three-sum variants, BST validation, valid anagram, climbing stairs, product of array except self). Improved code quality by removing duplicated solutions to enhance reliability. Overall impact: faster problem solving, reusable components, and a stronger baseline for interview prep. Technologies/skills demonstrated: algorithm design, DP, combinatorics, data validation, refactoring, and commitment to maintainability.

April 2025: Delivered end-to-end survey capabilities with a modular architecture overhaul for InnerCircle-ICD3/be-onboarding-project. Implemented core data models and APIs for surveys and responses, enabling rapid feature delivery and data integrity, while restructuring the codebase for scalable maintenance and deployment.

Monthly summary for 2025-03 focusing on key accomplishments, with emphasis on delivered features and technical impact for business value.