David Samuel Yang Xu

About

David Samuel Yang Xu is a Data Scientist based in Madrid, Spain, with a solid foundation in Python, SQL, and machine learning. Skilled at turning complex data into actionable insights, designing scalable data architectures, and communicating findings clearly. Multilingual: English, Spanish, German, and Cantonese, enabling collaboration across global teams. Experienced in data engineering, data storytelling, and cross-functional collaboration to drive informed decisions.

Experience

• Cashier and Inventory Manager · Patio de los Lecheros07-01-2019 – 03-01-2020

  Managed all cash and electronic transactions, ensuring 100% accuracy in daily sales reconciliation and balancing cash drawers. Responsible for comprehensive inventory management, including ordering, receiving, stocking, and tracking merchandise to prevent discrepancies. Conducted daily cash counts and prepared bank deposits, maintaining rigorous financial records and identifying any variances promptly. Provided excellent customer service during transactions, addressing inquiries and resolving payment issues effectively. Collaborated with management to optimize stock rotation and merchandising, contributing to improved sales floor presentation. Demonstrated strong attention to detail in verifying product quantities and prices, minimizing errors and maintaining accurate store records.

• Room Service Waiter · LAY YIN01-01-2018 – 01-01-2019

  Delivered exceptional room service to guests, ensuring timely and accurate order fulfillment for a high volume of requests, also maintained an in-depth knowledge of menu items, daily specials, and dietary considerations to provide personalized recommendations and address guest inquiries effectively, considering the restaurant as a Chinese-Venezuelan cuisine, I had fluent communication in Cantonese and Spanish with the customers. Collaborated seamlessly with kitchen staff and front desk to coordinate orders, resolve issues, and enhance the overall guest experience. Demonstrated strong problem-solving skills by efficiently addressing guest concerns and complaints, ensuring guest satisfaction.

Education

• Universidad de Buenos AiresComputer Science, Computer Science
• Henry BootcampData Scientist
• UdemyPostgreSQL
• IBM course - Data Analysis with PythonData Analysis with Python
• IBM course - Python for Data SciencePython for Data Science
• Universidad de CaraboboMechanical Engineering

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