Freelancer profile translated to English.
Back to original languageAbout Efrain
BI Developer with a focus on Power BI and process automation with Python. I help companies and entrepreneurs transform their data into visual, clear, and useful reports, without the need for technical knowledge. I automate repetitive tasks and ETL processes so you can save time, avoid errors, and make decisions based on reliable and up-to-date information. If you are looking for efficiency, clarity, and results that speak for themselves, I will be happy to help you.
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
- Fundamentals of professional networking Course on Data Visualization Principles for Business Intelligence Intensive Course in Web Front EndFundamentos del networking profesional Curso de Principios de Visualización de Datos para Business Intelligence Curso Intensivo en Web Front End
- Specialist in Big Data AnalyticsAutonomous University of the West2021Especialista en analítica de big data