Open to opportunities

Marielle Bañares

@mariellebanares

Message

I am a senior data engineer specializing in data transformation and quality.

Philippines

Message

What I'm looking for

I seek data engineering or architecture roles where I can lead ETL and migration projects, improve data quality, design scalable data models, and collaborate with cross-functional teams in a results-driven, learning-focused environment.

I am a data engineer with progressive experience since 2018, delivering end-to-end data solutions across consulting and telecom projects. I have supported international teams and led data architecture tasks—designing table relationships, data models, and mapping while building robust ETL pipelines using Python, Pandas, PySpark, Databricks, Talend, and SSIS.

I have executed large-scale migrations (Oracle to Greenplum), designed Snowflake schema warehouses, and prepared datasets for analytics in Power BI while enforcing data quality and reconciliation practices. I focus on pragmatic problem solving, clear communication with stakeholders, and delivering reliable, scalable data products that improve decision-making.

Experience

Work history, roles, and key accomplishments

Current

Assistant Manager, Data Engineering

Current

Deloitte

Jul 2022 - Present (3 years 1 month)

Supported Australia-based teams and developed data cleaning and transformation pipelines using Python, Pandas, PySpark, and Databricks, improving pipeline reliability and data quality. Designed table relationships, data models, and mappings to support analytics and pricing recommendations.

Python Pandas Pyspark Databricks SQL SSIS Data Modeling Data Architecture Power BI

Senior Data Engineer

Novare Technologies

May 2021 - Jun 2022 (1 year 1 month)

Led Oracle-to-Greenplum migrations and designed Snowflake-schema data warehouse models, authored DDL/DML and data mapping to enable production analytics. Implemented data transformation and aggregation queries to support enterprise reporting and data quality efforts.

Greenplum Oracle SQL DDL Data Modeling Data Mapping Hive ETL

Associate Data Engineer

Novare Technologies

Jul 2019 - Apr 2021 (1 year 9 months)

Monitored Data Lake production tables, reconciled source-to-production row counts, and developed ETL jobs in Talend to migrate MySQL to PostgreSQL, reducing data discrepancies and improving operational reliability. Participated in operations manual creation and backend debugging for ETL pipelines.

Talend MySQL PostgreSQL SQL Hive HDFS ETL Data Quality Debugging

Associate Software Engineer

Accenture

Oct 2018 - Apr 2019 (6 months)

Maintained and enhanced Oracle PeopleSoft applications and addressed ad hoc data issues using Oracle DB and PeopleCode to support end users and improve application reliability. Performed troubleshooting and implemented fixes for production data concerns.

Peoplesoft Oracle SQL PeopleCode Troubleshooting Application Support