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Ulises Rangel

@ulisesrangel2

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Data Engineer at Enroute Systems who automated Snowflake data loads and deployments with Airflow and GitHub Actions.

Mexico

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At Enroute Systems, I built and maintained production Airflow DAGs for multi-stage data workflows. I integrated Snowflake with Airflow to automate data loads, merges, and metadata updates.

At iOLAP Inc., I developed cloud data architectures and ETL pipelines for multiple clients. I optimized Snowflake queries, reducing average execution time by 40%, and implemented dbt pipelines that improved data reliability by 95% for real-time analytics.

At Oracle, I improved ETL performance by 35% through PL/SQL optimization and query restructuring. I also developed functionality for legacy Java-PL/SQL systems.

Earlier, I developed ETL processes at AstraZeneca and TATA Consultancy Services, supporting financial analysis, regulatory reporting, and banking decisions. I’m expanding my expertise in distributed data processing with Spark and PySpark.

Experience

Work history, roles, and key accomplishments

Data Engineer

Enroute Systems

Oct 2025 - May 2026 (7 months)

Built and maintained production Airflow DAGs for pipeline orchestration and automation. Integrated Snowflake with Airflow for cloud data integration, and implemented CI/CD pipelines using Git and GitHub Actions.

Airflow Snowflake SQL Git GitHub Actions Podman Python Data Pipelines CI CD

Sr ETL Developer/Data Engineer/Release Manager

iOLAP Inc.

Jul 2022 - Apr 2025 (2 years 9 months)

Developed and maintained cloud data architectures for multiple clients, managing ETL pipelines and optimizing costs in Snowflake and AWS. Implemented dbt transformation pipelines and data observability features, and led release management for critical applications.

Snowflake AWS DBT Airflow Snowpipe S3 Lambda Step Functions Snaplogic AWS Glue ETL Data Pipelines Release Management

Sr PL/SQL Developer

Oracle

Aug 2020 - Jul 2022 (1 year 11 months)

Developed and supported Java systems and ETL processes for enterprise data warehouse. Improved ETL performance by 35% through PL/SQL optimization and collaborated on migration to cloud platforms.

Pl SQL Java ETL Oracle Data Warehouse Performance Optimization

Sr PL/SQL - Delphi 7 Developer

GEODIS

Aug 2019 - Aug 2020 (1 year)

Provided support and development for critical legacy logistics systems based on Delphi and Oracle. Reduced report processing time by 50% through code refactoring and query optimization.

DELPHI 7 Pl SQL Oracle Legacy Systems Query Optimization

M.A.P.S Analyst/Sr ETL Developer

AstraZeneca

Jul 2016 - Aug 2019 (3 years 1 month)

Developed and maintained ETL processes in Informatica PowerCenter and SnapLogic for financial analysis and regulatory compliance. Improved financial data quality by 45% through automated validations.

Informatica PowerCenter Snaplogic ETL Data Quality Regulatory Compliance Stakeholder Management

ETL Developer/L3 Support

TATA Consultancy Services

Jun 2011 - Jul 2016 (5 years 1 month)

Developed ETL processes for Bank of America, integrating data for financial analysis and Cognos reporting. Implemented MS SQL Server pipelines processing 5M+ customer records and provided L3 support.

ETL MS SQL Server Cognos Data Integration AS400 system L3 Support Data Pipelines