Herbert Rafael Reyes Portillo
Herbert Rafael Reyes Portillo

Senior Data Engineer

Actively looking · Member since 12 Oct 2026
Location
Guatemala
Desired salary
Unspecified
Work preference
Remote Only
Experience level
Senior

About

Professional summary

I am a Senior Data Engineer with more than five years of experience designing, building, and optimizing scalable data pipelines and cloud data platforms. I specialize in transforming large-scale enterprise data into reliable, analytics-ready datasets.

I have strong hands-on experience with Databricks, PySpark, Apache Spark, Python, SQL, Azure, Delta Lake, and Lakehouse architectures. I build ETL and ELT solutions that support reporting, analytics, AI, fraud detection, credit risk, and customer intelligence use cases.

I have improved critical pipeline performance by up to 75%, reducing delivery cycles from multiple days to less than 24 hours. I have also integrated more than 30 enterprise sources into centralized and standardized data foundations.

I am experienced in data modeling, data quality, metadata management, schema documentation, validation, traceability, and feature engineering. I focus on delivering dependable datasets that are easy for downstream teams to consume.

I work effectively with international, cross-functional teams on technical design, estimation, delivery, and production support. I also contribute to CI/CD and deployment automation using Azure DevOps, Git, YAML, Helm, and enterprise scheduling tools.

I hold Databricks Data Engineer Associate, Microsoft Fabric Data Engineer Associate, and AWS Cloud Practitioner certifications. My background combines data engineering, cloud platforms, banking systems, software development, and data-intensive enterprise environments.

Skills

21 capabilities

Tech stack & tools

Working toolkit

Experience

Career history

Senior Data Engineer | AI & Data EY

Designed, developed, and supported scalable ETL/ELT solutions for enterprise consulting engagements using Databricks, PySpark, Spark SQL, Python, Microsoft Azure, Delta Lake, and Microsoft Fabric. Built and optimized Lakehouse-oriented pipelines for analytics, reporting, and AI-enabled workloads.

Implemented data modeling, validation, quality, and traceability practices to deliver reliable enterprise datasets. Collaborated with international cross-functional teams on technical design, estimation, and delivery, while supporting Azure Data Lake Storage, Blob Storage, Managed Identities, Azure DevOps, Git, YAML, Helm, CI/CD, and deployment automation.

Senior Data Engineer BAM

Designed, developed, and automated large-scale ETL/ELT pipelines processing millions of records with Python, PySpark, Apache Spark, Impala, Hadoop, and SQL. Improved critical pipeline performance by up to 75%, reducing delivery cycles from two to three days to under 24 hours through Spark, query, and workflow optimization.

Built a centralized Master Data Foundation integrating more than 30 enterprise data sources into standardized datasets. Delivered production workflows for credit risk, fraud detection, customer analytics, data validation, and feature engineering, while managing Gold-layer metadata, schema documentation, orchestration, CI/CD, Azure DevOps, Git, and Artifactory.

Software Developer Banco G&T Continental

Developed and maintained backend and data-intensive banking solutions using .NET, C#, SQL Server, and T-SQL in core banking environments. Performed advanced SQL analysis on production replicas and transactional tables to investigate discrepancies, validate financial information, and support operational processes.

Monitored and reconciled daily ACH transactions, troubleshot inconsistencies across banking systems, and created reusable SQL queries and diagnostic scripts for reconciliation and incident analysis. Served as a final escalation resource for complex production incidents, application defects, banking integrations, QA, and production releases.

Education

Learning history

Universidad Galileo

Postgraduate Degree, Data Analysis and Forecasting

Completed a postgraduate degree in Data Analysis and Forecasting.

MITx / edX

Graduate-level coursework, Statistics and Data Science

Completed graduate-level coursework in statistics and data science, including machine learning, probability, statistics, and time series.

Universidad de San Carlos de Guatemala

Bachelor's degree, Computer and Systems Engineering

Completed a bachelor's degree in Computer and Systems Engineering.

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