Haijun Si is a Software Engineer at Meta since June 2025, with previous experience as a Programming Languages Teaching Assistant and Web Programming TA at Tufts University in August 2023. Notable prior roles include a Software Engineer Intern at Sans Clothing from May to August 2023, where a Minimum Viable Product was developed for a Fashion Tech Startup, along with a 3D-based Sizing and Clothing Recommendation system. Additionally, Haijun served as a Researcher at the National Science Foundation from June to August 2022, focusing on 3D printing quality using Machine Learning, resulting in a prediction model with a 3% absolute error. Education includes a Bachelor’s degree in Computer Science from Tufts University (2020-2024) and ongoing Master of Science in Computer Science at Tufts University (2024-2025).
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