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Katherine Pereyra Estrada

Katherine Pereyra Estrada

BI Analyst

Maritima Dominicana | Dominica Republick

Technologies

My Portfolio Highlights

My New Project

Exploring NYC Public School Test Result Scores

My New Track

SQL Server Developer

My New Course

Introduction to Python

My New Project

Exploring NYC Public School Test Result Scores

Curious explorer of data landscapes, seeking hidden treasures.

My Work

Take a look at my latest work.

course

Introduction to SQL

course

Introduction to Python

DataLab

Project: Exploring NYC Public School Test Result Scores

course

Introduction to SQL

DataCamp Course Completion

Take a look at all the courses I’ve completed on DataCamp.

Courses

Introduction to Python
Introduction to SQL
Understanding Artificial Intelligence
Introduction to Power BI

My Work Experience

Where I've interned and worked during my career.

Maritima Dominicana SAS | Oct 2022 - Present

Senior Business Intelligence Analyst | Sr. Data Analyst

• Designed data models to support decision-making processes. • Developed BI reports and dashboards. •Provided technical support to solve issues related to analytics and reporting. •Created complex dashboards and data tools to monitor business metrics. •Led the design of Power BI reports for a major KPI renewal project. •Extracted, cleaned, and transformed data from various sources, including SharePoint, Excel, and SQL Server. •Developed DAX measures and SQL queries. •Collaborated with users to gather requirements for creating reports and validate deliverables. • Increased dashboard development efficiency by 20% by automating data extraction processes using Python. •Improved KPI tracking accuracy by 15% through the design of detailed Power BI reports. •Implemented Power Automate workflows to automate report updates in Power BI Service, improving data refresh efficiency and reducing manual interventions. ________________________________________ •Diseñé modelos de datos para respaldar los procesos de toma de decisiones. •Desarrollé informes y paneles de BI. •Brindé soporte técnico para resolver problemas relacionados con análisis y reportes. •Creé paneles complejos y herramientas de datos para monitorear métricas empresariales. •Lideré el diseño de informes en Power BI para un importante proyecto de renovación de KPI. •Extraje, limpié y transformé datos de diversas fuentes, incluyendo SharePoint, Excel y SQL Server. •Desarrollé medidas en DAX y consultas en SQL. •Colaboré con usuarios para recopilar requisitos en la creación de reportes y validar entregables. •Aumenté en un 20% la eficiencia en el desarrollo de paneles mediante la automatización de extracción de datos con Python. •Mejoré la precisión del seguimiento de KPIs en un 15% mediante el diseño de informes detallados en Power BI. • Implementé flujos de trabajo en Power Automate para automatizar la actualización de reportes en Power BI Service, mejorando la eficiencia de actualización de datos .
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Management Solutions & TS | Jun 2021 - Oct 2022

Consultor BI

● Created dashboards and reports using Excel and Power BI. ● Cleaned and transformed data using Power Query. ● Managed Key Performance Indicators (KPIs). ● Developed control tools in Excel to optimize business processes Inventory Control, Purchase Control, Suggested Orders. ● Data modeling in Power BI and Power Pivot. ● Mapped, analyzed, designed, and implemented Improve Processes to increase productivity and efficiency in companies. ● Reduced data processing time by 25% through optimization of data cleansing workflows. ● Increased business process efficiency by 10% by implementing automated Excel-based tools for inventory control.

Grupo Unicomer/ Unicomer Group | Jun 2018 - May 2021

Soporte IT

● Automated tasks using Python. ● Performed ETL to extract files from cash registers and send them to a FTP folder and NAS. ● Managed Issabel's IP Voice Central. ● Generated call reports using Excel and Power BI. ● Provided hardware and software support to users. ● Increased data processing efficiency by 15% through automation in Python.

iZone | Sep 2013 - Jul 2016

ACMT: Apple Certified Macintosh Technician

Diagnosticar y reparar a todos los productos de la marca a nivel de hardware y software, que se asignaran en menor tiempo posible, inspeccionar productos en solicitud de cambios en garantía y verificar que estos estén bajos los estándares establecido por la marca. Asesorar a los clientes con sus equipos, instalar programas, instalar OSX, realizar backup y migración de datos, configurar correos, creación de Apple id, vender los productos, todo lo relacionado con informática etc

My Education

Take a look at my formal education

Ingeniera en Sistemas , Ingeniería de sistemas in System engineer Universidad Dominicana O&M | 2025

About Me

Katherine Pereyra Estrada

Business Intelligence Analyst with over 3 years of experience in data analysis, reporting, and dashboard development. Skilled in Power BI, SQL, Python, and Azure Synapse, with a strong focus on transforming complex datasets into actionable insights.

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