About Efrain
BI Developer con enfoque en Power BI y automatización de procesos con Python. Ayudo a empresas y emprendedores a transformar sus datos en reportes visuales, claros y útiles, sin necesidad de conocimientos técnicos. Automatizo tareas repetitivas y procesos ETL para que ahorres tiempo, evites errores y puedas tomar decisiones basadas en información confiable y actualizada. Si buscas eficiencia, claridad y resultados que hablen por sí solos, estaré encantado de ayudarte.
Spanish
Native or bilingual
English
Fluent
Remote only
Primarily works remotely
Experience
- Grupo ErumPower BI DeveloperMay 2025 - Today (1 year and 1 month)Spain✅ Designed and developed dashboards, reports, and data visualizations in Power BI, aligned with business requirements and UX best practices (Dataviz). ✅ Analyzed large datasets to generate key insights and support data-driven decision-making. ✅ Connected, transformed, and cleaned data (ETL / ELT) from multiple sources (databases, CSV/Excel files, APIs, etc.). ✅ Implemented efficient and scalable data models to enhance report performance and quality. ✅ Collaborated with cross-functional teams (IT, Finance, Marketing, Sales, etc.) to understand business needs and deliver effective data solutions. ✅ Ensured data integrity, accuracy, and consistency across all reports and dashboards. ✅ Trained and supported end users in leveraging Power BI reports for their daily operations.
- FreelanceFreelance Consultant – Data Analysis & VisualizationJune 2024 - Today (2 years)SpainThrough my training sessions, I have not only improved teams' technical skills but also their ability to transform complex data into clear, actionable insights that support business strategy.
- Wadua AnalyticsBI/UX EngineerJanuary 2022 - April 2025 (3 years and 3 months)Cali, Valle del Cauca, Colombia• Creation of interactive, tailored visualizations using Python, JavaScript, and libraries such as D3.js, enhancing the user experience.
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Education
- Fundamentos del networking profesional Curso de Principios de Visualización de Datos para Business Intelligence Curso Intensivo en Web Front EndFundamentos del networking profesional Curso de Principios de Visualización de Datos para Business Intelligence Curso Intensivo en Web Front End
- Especialista en analítica de big dataUniversidad Autónoma de Occidente2021Especialista en analítica de big data