Developed ACM AI's website, supporting 2,000+ members using React, MongoDB, Node.js, and Express.js. I also developed the AI Competitions platform, hosting 200+ national competitors and awarding over $5,000 in prizes, and refactored the competition logic to be configuration-driven, enabling easy support for new competitions. Additionally, I wrote several unit test suites and mocks using Jest that reduced manual verification time by approximately 2X.