juan carlos montaña garzon

I’m a Data Engineer and Python Automation Developer with 4+ years of experience building ETL pipelines, REST API integrations, and serverless automation workflows. I focus on reducing manual operations through practical automation, reliable data validation, and repeatable pipeline design.

In my most recent role (Jan 2026 – May 2026), I built serverless data pipelines using GCP Cloud Functions and Python 3.11 to eliminate manual intervention in recurring batch processes. I automated multi-channel communications (email, WhatsApp, SMS) via REST APIs, developed BigQuery ETL transformations with quality controls before production inserts, and added automated error alerting to speed up operational response.

Before that, I served as a Data Analyst & Automation Developer (Mar 2024 – Nov 2025), where I automated repetitive operational workflows using Python and KNIME. I designed end-to-end ETL pipelines (extraction, transformation, validation, load), defined validation rules to detect inconsistencies/duplicates/out-of-range values, and documented data dictionaries and table schemas for traceability and long-term maintainability.

Earlier, I built backend capabilities as a Laravel 8/PHP developer, integrating third-party APIs, creating REST endpoints, and supporting complex business logic with PostgreSQL schemas, views, and stored procedures. I bring this full system lifecycle perspective—plus strong SQL and reporting experience with Power BI—to deliver dependable, cloud-native data products.