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Rayhan Ozzy Ertarto is a Mathematics and Informatics Teacher at SMP Djama'atul Ichwan Surakarta and serves as a Master Teacher for Mathematics at Brain Academy by Ruangguru. With experience as a Data Science Trainee at Jakarta Smart City, Rayhan contributed to flood mitigation efforts through data analysis and forecasting models. Previous roles include Python Apprentice in a Cisco-backed program, Data Science Apprentice at DQLab, and Data Engineer at Xeratic, demonstrating proficiency in data manipulation and ETL processes. Additionally, Rayhan has a background in tutoring Mathematics across various educational levels and holds a Bachelor's degree in Mathematics from Universitas Lambung Mangkurat, along with a High School diploma in Computer Engineering from SMK Negeri 2 Surakarta.