Omar G.

Data Engineer

Omar is a seasoned Data Engineer with over ten years of commercial experience, specializing in the design, development, and management of large-scale, cloud-based data warehouses and strategic analytics solutions. He brings deep technical expertise in Python, SQL, Google Cloud Platform (GCP), and Apache Airflow.

Among his key accomplishments is leading the successful migration of a data warehouse—powered by Airflow data pipelines—from AWS RDS to BigQuery within the GCP ecosystem. He has also spearheaded end-to-end cloud migration initiatives and built data warehouses from the ground up, leveraging Python-based pipelines to support scalable, high-performance data environments.

Omar’s ability to architect and optimize data infrastructure ensures reliable, analytics-ready environments that drive informed business decisions.

Main expertise

  • ETL
    ETL 10 years
  • Metabase
    Metabase 3 years
  • dbt
    dbt 3 years

Other skills

  • Git
    Git 7 years
  • Oracle
    Oracle 4 years
  • Kubernetes
    Kubernetes 4 years
Omar

Omar G.

El Salvador

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Selected experience

Employment

  • Senior Data Engineer

    Pager Inc - 3 years 6 months

    • Undertook critical responsibilities in different projects

    • Migration of the Data Warehouse from AWS to GCP (building new data pipelines, data models, etc)

    • Implementation of new data marts, adoption of a CDC tool for the ingestion of raw data

    • Adoption of new Data Governance tool and creation of data integrations.

    Technologies:

    • Technologies:
    • ETL ETL
    • Git Git
    • Metabase Metabase
    • AWS AWS
    • dbt dbt
    • Terraform Terraform
    • PostgreSQL PostgreSQL
    • MongoDB MongoDB
    • Kubernetes Kubernetes
    • Google Cloud Google Cloud
    • BigQuery BigQuery
    • Apache Airflow Apache Airflow
    • Python Python
    • Data Engineering
    • SQL SQL
    • AWS S3 AWS S3
  • ETL Developer

    Applaudo Studios - 8 months

    • Participated in a project whose goal was the modernization of the technology stack supporting data analysis and decision-making based on financial information

    • The project consisted of the migration of data resources from multiple legacy and heterogeneous sources into GCP

    • Responsibilities included the development of new data pipelines using Scala and Spark

    • Collaborated closely with client stakeholders to ensure effective communication and successful project outcomes

    Technologies:

    • Technologies:
    • Scala Scala
    • ETL ETL
    • Git Git
    • Apache Spark Apache Spark
    • Google Cloud Google Cloud
    • Data Engineering
    • SQL SQL
  • BI & Data Architect

    Telus International - 9 months

    • Led the design and implementation of a standardized reporting package, enabling consistent offerings for the company's clients.

    • Successfully collaborated to reconcile data discrepancies across multiple sources and standardized metrics and KPIs to ensure accuracy and consistency

    • Implemented a mix of technical expertise and analytical thinking to influence the decisions associated with data modeling, database design, data integration, data governance, etc

    • Additionally, the responsibilities included advocating for the implementation and alignment with best practices

    Technologies:

    • Technologies:
    • Oracle Oracle
    • Talend
    • Apache NiFi Apache NiFi
    • Apache Spark Apache Spark
    • MSSQL MSSQL
    • Google Cloud Google Cloud
    • BigQuery BigQuery
    • Apache Airflow Apache Airflow
    • Python Python
    • Data Engineering
    • SQL SQL
  • Data Warehouse Developer

    TELUS International - 1 year 1 month

    • Participated in multiple projects and daily tasks involving multiple technologies.

    • The role involved the maintenance and creation of Data Pipelines

    • Creation and enhancement of reports and dashboards

    • Development of automated reports for internal and external users.

    Technologies:

    • Technologies:
    • ETL ETL
    • Oracle Oracle
    • Talend
    • Apache NiFi Apache NiFi
    • Apache Spark Apache Spark
    • MSSQL MSSQL
    • Google Cloud Google Cloud
    • BigQuery BigQuery
    • Apache Airflow Apache Airflow
    • Python Python
    • Data Engineering
    • SQL SQL
  • NetCracker Developer

    TELUS - 2 years 5 months

    • Participated as a senior developer in different projects associated with the maintenance and improvement of the

    • Telecommunications platform: Netcracker. This was a challenging position that required discovery work and communication skills to obtain important information from different SMEs, along with the development of a complex code base for the Netcracker platform.

    Technologies:

    • Technologies:
    • Oracle Oracle
  • Business Intelligence Developer (Short-term Project)

    SIMAN - 4 months

    • Worked on a project whose main goal was migrating an entire business area (Customers Loyalty) from a provider’s technology stack into the company’s own stack

    • Partnered with technical subject matter experts (SMEs) to gain a deep understanding of the data nuances within source systems

    • Engaged with business representatives to ensure alignment of data products with business requirements and objectives

    • Technical responsibilities included: designing new data models, creation of new ETLs and definition of reports

    Technologies:

    • Technologies:
    • ETL ETL
    • Oracle Oracle
    • Data Engineering
    • SQL SQL
  • Developer Analyst

    AFP Confia - 10 months

    • Participated in different projects, related to the maintenance and addition of new features to the company’s website services and desktop applications.

    Technologies:

    • Technologies:
    • Oracle Oracle
    • SQL SQL
  • Business Intelligence Solutions Developer

    Avianca - 3 years 5 months

    • Contributed to the successful integration of two Data Warehouses following the company merger, ensuring seamless data consolidation

    • Participated in the maintenance, enhancements, and expansion of existing data pipelines to support ongoing business needs

    • Designed and developed automated executive reports, streamlining data delivery for senior leadership

    • Development and maintenance of ETLs to feed the Data Warehouse of the company

    • Utilized MicroStrategy to design and develop ad-hoc reports and dashboards, enabling data-driven decision-making

    Technologies:

    • Technologies:
    • ETL ETL
    • Oracle Oracle
    • MSSQL MSSQL
    • Data Engineering
    • SQL SQL

Education

  • BSc.Computer Science

    Universidad de El Salvador · 2002 - 2009

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