Sergio Alejandro Castellanos Castellanos
Seo & Digital Marketing Analyst
Perfil profissional
Business Intelligence Master ’ s student and licensed Economist with hands-on experience in finance , data science , and digital marketing . Strong background in data-driven financial reporting automation and predictive analytics
Experiência de trabalho
Tracked performance metrics using Meta Ads Manager and Google Analytics. Designed high-performing creatives achieving up to 9% CTR on TikTok.
realização principalRan over 25 paid campaigns on Facebook Ads and TikTok Ads for eCommerce.
Created predictive models for tax liability forecasting using XGBoost and LSTM networks. Built custom Power BI and Tableau dashboards for internal stakeholders.
realização principalDeveloped automated financial models using R, Python, and VBA.
Supported audit processes by creating pivot-ready data exports from SAP systems. Conducted variance analyses using Python.
realização principalBuilt daily tax and treasury reconciliation reports using Excel Macros, SQL, and R.
Formação acadêmica
Universidad externado de colombia | Profesional
