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Daniel Zubieta

@danielzubieta

Senior Data Engineer at EY and Volestra who built a Snowflake chatbot with Text-to-SQL agents and enterprise security guardrails.

Bolivia

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At EY, I built an enterprise multi-agent system using LangGraph and LangChain to make a Snowflake data warehouse accessible through a conversational chatbot. I also developed Text-to-SQL agents and security guardrails against prompt injection.

At Volestra, I designed and implemented an enterprise data warehouse for a FinTech environment and built Python ingestion pipelines orchestrated with Apache Airflow. I also migrated GCP pipelines, cloud functions, and a data lake to Azure.

As a freelance data engineer, I designed Snowflake data warehouses and developed event-driven pipelines with AWS Glue, Lambda, and Python. I also worked on data integration and performance tuning across GCP, AWS, and Azure.

Earlier, I developed BI and data warehouse systems, database solutions, and cloud-integrated applications at organizations including Jobsity, TIGO BOLIVIA, GOJA BOLIVIA, IPROJECT PARTNERS, REDSPHERE SOFTWARE, and TRILOGY SOFTWARE BOLIVIA.

Experience

Work history, roles, and key accomplishments

Senior Data Engineer / Architect

Volestra

Mar 2025 - Aug 2026 (1 year 5 months)

Architected and deployed cloud infrastructure on Azure Kubernetes Service (AKS) and ACR, hosting and orchestrating Apache Airflow, PostgreSQL, and Pentaho. Migrated GCP pipelines, cloud functions and Datalake to Azure.

GCP BigQuery Cloud Functions AKS ACR PostgreSQL Airflow Pentaho SQL Server Python C#

Senior Data Engineer / AI Data Solutions

EY (Ernst & Young)

Nov 2025 - Jun 2026 (7 months)

Designed, built, and maintained high-performance data pipelines and ingestion workflows in Snowflake and Azure Data Factory. Implemented an enterprise multi-agent system with LangGraph, LangChain, and multiple LLMs to create an interactive conversational chatbot over the Snowflake DWH.

Snowflake Python LangGraph Lang Chain Azure Data Factory TypeScript React

Freelancer Data Engineer

Freelance

Jul 2023 - Feb 2025 (1 year 7 months)

Led the design and implementation of enterprise Data Warehouses in Snowflake, optimizing logical and physical schemas to support complex analytical requirements. Developed and maintained robust event-driven data pipelines leveraging AWS Glue, Lambda, and Python.

GCP BigQuery Cloud Functions AKS ACR AWS Glue Snowflake Python Azure Data Factory Synapse TypeScript React

Senior Data Engineer

Jobsity

Sep 2022 - Jun 2023 (9 months)

Developed and optimized ETL pipelines in Azure Data Factory and refactored on-premise SSIS packages for cloud migration. Built automated transformation workflows using Python and DBT, ensuring high data quality and pipeline reliability.

Azure Data Factory Python DBT Kafka SSIS Snowflake Databricks SQL

Senior Database Engineer

Tigo Bolivia

Nov 2021 - Jul 2022 (8 months)

Developed complex stored procedures in Oracle PL/SQL, ETL development, and executed SQL query tuning and optimization. Managed a team of developers, overseeing database design and data pipeline deliverables.

Pl SQL Oracle ETL Tools DBT SSIS Pentaho Kafka Erwin Data Modeler AWS

Software Engineer / Data Engineer

Goja Bolivia

Mar 2018 - Jul 2021 (3 years 4 months)

Database Administrator (DBA) for PostgreSQL; developed ETLs in PL/SQL and AWS (Glue, Redshift) processing high-volume Amazon marketplace data. Designed, developed, and managed Power BI Marketing & Sales Dashboards, and built internal marketplace web tools in Java, Vue.js, and React.

AWS Glue Redshift Lambda PostgreSQL Airflow NiFi Kafka Python Java Docker Kubernetes Terraform

Business Analyst / Data Engineer

iProject Partners

Nov 2014 - Feb 2018 (3 years 3 months)

Database Administrator (DBA) for SQL Server, Oracle, and PostgreSQL; designed enterprise reports in SSRS and Power BI. Developed web applications with Azure cloud integration for YPFB and mobile apps with Xamarin.

Pl SQL Oracle SQL Server Azure SAP Data Services SSIS SSAS SSRS Power BI C#Xamarin

MedNet Project Technical Lead

Redsphere Software

Sep 2013 - Oct 2014 (1 year 1 month)

Architecture and database design, administration of SQL Server database, and technical team leadership for hospital integration systems.

.NET PHP MySQL SQL Server 2008 Java PrimeFaces GWT Data Architect

Software Engineer BI/DW

Trilogy Software Bolivia

Mar 2011 - Sep 2013 (2 years 6 months)

Analyzed, designed, and implemented CRM/ODS Data Warehouses; developed Pentaho ETL workflows with Oracle 11g and optimized materialized views. Created Oracle database management KPIs and developed end-to-end BI reporting systems.

Kettle (ETL Tool)MySQL Oracle 11g Pl SQL Java Erwin Data Modeler