Gabriela is available for hire

Gabriela Pessoa

Verified Expert in Engineering

Data Engineer and Developer

Joinville - State of Santa Catarina, Brazil

Toptal member since January 30, 2026

Expertise

Data Warehouse Data Engineering Analytics Development Data Analysis Data Science SQL Database ETL Business Intelligence Development Excel Development Oracle Development

Bio

Gabriela is a data professional with 23+ years of experience across BI, data warehousing, and modern data engineering. She is certified in Snowflake (SnowPro Core) and specializes in dbt, with strong expertise in reviewing and optimizing vendor‑delivered models. Gabriela is skilled in leading international and remote projects, ensuring data quality and performance at scale.

Portfolio

Job Matching Services

SQL, Computer Skills

Cognitivo School

dbt Cloud, Amazon, Data Modeling, Data Build Tool (dbt), User Requirements...

Blue.Cloud

Snowflake, Agile, Documentation, SQL Server 2019, Data Engineering, Analytics...

Experience

Analysis - 20 years
Data - 20 years
SQL - 20 years
ETL - 18 years
Data Warehouse Design - 18 years
Snowflake - 5 years
ELT - 5 years
dbt Cloud - 3 years

Preferred Environment

Snowflake, dbt Cloud, SQL, Data, ETL, ELT, Agile, Modeling, Analysis, Documentation

The most amazing...

...thing about data engineering is meeting new clients and learning a new world of objects, needs, and people.

Work Experience

Freelance SQL Technical Interviewer

2024 - PRESENT

Job Matching Services

Met with potential candidates to analyze and rate their SQL expertise for job opportunities.
Provided detailed feedback about the candidate, explaining when the profile matches the need.
Participated in requirements meetings to understand the candidate profile.

Technologies: SQL, Computer Skills

Data Engineer

2021 - PRESENT

Cognitivo School

Built dbt models to transform and materialize data for a shoe company.
Served as a functional analyst during client meetings and gathered client requirements.
Created documentation to map source to target data, specifying all transformations and filters that should be applied.
Engaged as a star schema data modeler to construct the database and start data transformations. Developed star schema and Snowflake data models using Vertabelo.

Technologies: dbt Cloud, Amazon, Data Modeling, Data Build Tool (dbt), User Requirements, Documentation, Data Engineering, Analytics, Data Pipelines, Data Warehousing, Database Design, Business Intelligence (BI), Pipelines, JSON, ETL Tools, Amazon Web Services (AWS), Data Cleaning, Data Cleansing, Requirements, Data Warehouse Design, Computer Skills, Analysis, Modeling, ELT, Data, Data Analysis, Data Quality, Complex Data Analysis, SQL, Database Modeling, Data Validation, Databases, SaaS, Data Mapping, CSV File Processing, Query Optimization, Large Data Sets, Performance Optimization, PostgreSQL

Lead Data Engineer

2023 - 2025

Blue.Cloud

Worked on Snowflake development, including native apps, procedures, functions, tables, and views.
Enabled data consumption from different sources, and made this data ready—cleaned and transformed—to attend to final users.
Worked with global teams to manage their requests.

Technologies: Snowflake, Agile, Documentation, SQL Server 2019, Data Engineering, Analytics, Data Pipelines, Data Warehousing, Database Design, Business Intelligence (BI), ETL Pipelines, ETL Tools, Data Cleaning, Data Cleansing, Requirements, Testing, Data Warehouse Design, Computer Skills, Analysis, ELT, ETL, Data, Microsoft Excel, Data Analysis, Data Quality, Complex Data Analysis, SQL, Database Modeling, Data Validation, Databases, Data Mapping, Query Optimization, Large Data Sets, Performance Optimization

Microsoft & Snowflake Data Engineer

2022 - 2024

Pantheon

Engaged in SQL Server Integration Services development, constructing and maintaining ETLs.
Developed Azure Functions using Azure Data Factory and Python functions to read and upload PDF files into an SQL database.
Handled Snowflake objects and roles, and Qlik replication tasks.

Technologies: SQL Server 2019, Snowflake, Azure, Python 3, Qlik, Data Engineering, Analytics, Azure Data Factory (ADF), Data Pipelines, Data Warehousing, Database Design, Python, Business Intelligence (BI), Pipelines, JSON, Microsoft Azure, ETL Pipelines, ETL Tools, Data Cleaning, Data Cleansing, Requirements, Testing, Data Warehouse Design, Computer Skills, Analysis, ETL, Data, Microsoft Excel, Data Analysis, Data Quality, Complex Data Analysis, SQL, Database Modeling, Data Validation, Databases, Data Mapping, CSV File Processing, Query Optimization, Large Data Sets, Performance Optimization, PostgreSQL, Role-based Access Control (RBAC)

Senior Technology Specialist

2018 - 2022

Qintess

Handled requirements analysis and data modeling, defining the model to support the required needs.
Contributed actions to increase the team's maturity level, including tasks to perform unit tests and run security validations such as Fortify and Checkmarx scans.
Engaged in PL/SQL development using embedded HTML and JavaScript.
Performed QA activities, such as creating test cases in Team Foundation Server (TFS) to validate user stories.

Technologies: JavaScript, Oracle, Security, Agile, Data Modeling, Documentation, Data Engineering, Analytics, Data Pipelines, Data Warehousing, Database Design, Business Intelligence (BI), ETL Pipelines, ETL Tools, Data Cleaning, Data Cleansing, Data Warehouse Design, Computer Skills, Analysis, Modeling, ETL, Data, Microsoft Excel, Data Analysis, Data Quality, Complex Data Analysis, SQL, Database Modeling, Data Validation, Databases, Data Mapping, CSV File Processing, Query Optimization, Large Data Sets, Performance Optimization

Senior BI Consultant

2014 - 2019

logicinfo

Maintained and enhanced data extraction routines (ETLs).
Analyzed data to support customers and guarantee data integrity.
Maintained and developed applications using Oracle Forms, PROC steps, and PL/SQL routines.
Managed a team of three people, organizing the activities according to a queue and the defined SLA.

Technologies: Oracle, ETL, Oracle ODI, Control-M, TFS, Forms, Data Engineering, Analytics, Data Pipelines, Data Warehousing, Database Design, Team Leadership, Business Intelligence (BI), ETL Pipelines, ETL Tools, Data Cleaning, Data Cleansing, Oracle Forms, Unix, Data Warehouse Design, Computer Skills, Analysis, Modeling, Data, Microsoft Excel, Data Analysis, Data Quality, Complex Data Analysis, SQL, Database Modeling, Data Validation, Databases, Data Mapping, Query Optimization, Large Data Sets, Performance Optimization

SQL BI Support Analyst

2008 - 2014

Wipro

Maintained and developed applications using Oracle Forms, PROC steps, and PL/SQL routines.
Engaged in root-cause analyses, incident treatment, and problem management.
Maintained business intelligence (BI) cubes and reports.

Technologies: SQL, Unix, Oracle, Data Engineering, Analytics, Data Warehousing, Database Design, Team Leadership, Business Intelligence (BI), ETL Pipelines, Data Cleaning, Data Cleansing, Oracle Forms, TFS, Control-M, Computer Skills, Analysis, Modeling, ETL, Data, Microsoft Excel, Data Analysis, Data Quality, Complex Data Analysis, Database Modeling, Data Validation, Databases, Data Mapping, Query Optimization, Large Data Sets

Mid-level Systems Analyst

2007 - 2008

Nova America

Developed systems for medical assistance and payroll.
Handled requirements analysis, programming, testing/approval, implementation, user training, help desk support when using the system, and creating user manuals.
Implemented customizations in the Oracle applications platform for HR and maintenance in administrator and application developer modules.

Technologies: Oracle EBS, Oracle, Documentation, Requirements, Database Design, Computer Skills, HR Analytics, SQL, Database Modeling, Data Validation, Databases

Systems Analyst III

2005 - 2007

Sercomtel S.A. Telecomunicações

Developed a software for pricing local and domestic long-distance or international calls, aimed at replacing an outsourced software.
Performed requirements analysis, business rules, technical specification design, coding, testing, approval among users, deployment, user training, help desk support when using the system, and user manual creation for the project.
Developed database stored procedures, including packages, procedures, and functions, and built applications using Oracle Forms and Oracle Reports.

Technologies: Oracle, Oracle Forms, Database Design, Computer Skills, SQL, Database Modeling, Databases

Systems Analyst I

2002 - 2005

Logus Consultoria e Sistemas

Built retail systems for factories of oil, alcohol, coffee, juice, and mayonnaise, including product registration, inventory management, production planning and control (PCP), and factory movement, such as production, shipments, returns, and losses.
Developed IT systems for the production unit of alcohol and analyzed the product and weighing trucks.
Handled requirements analysis, programming, testing, approval, deployment, user training, help desk support when using the system, and creating user manuals.

Technologies: Progress 4GL, Documentation, User Requirements, Database Design, Requirements, Computer Skills, Database Modeling, Databases

Experience

Omnichannel Sales

A specific data extraction for the omnichannel information, so the stores could manage how many sales had come from other inputs. We received CSV data files and ingested them into an Oracle database, then filtered the omnichannel data and generated the fact and dimension tables for dashboard consumption.

Education

2006 - 2007

Master's Degree in Database

Universidade Norte do Paraná (UNOPAR) - Londrina, Brazil

1998 - 2002

Bachelor's Degree in Computer Science

State University of Maringa - Maringa, Brazil

Certifications

OCTOBER 2024 - OCTOBER 2026

SnowPro Core

SnowFlake

Skills

Tools

Microsoft Excel, dbt Cloud, Control-M, TFS, Oracle Forms

Languages

SQL, Snowflake, Python 3, JavaScript, Progress 4GL, Python

Paradigms

ETL, Database Design, Business Intelligence (BI), Role-based Access Control (RBAC), Agile, Testing, Oracle ODI

Storage

Database Modeling, Data Validation, Databases, SQL Server 2019, Data Pipelines, JSON, PostgreSQL

Platforms

Oracle, Qlik, Amazon, Azure, Unix, Amazon Web Services (AWS)

Other

Data, ELT, Analysis, Documentation, Data Warehouse Design, Data Modeling, Requirements, User Requirements, Data Engineering, Analytics, Data Warehousing, ETL Pipelines, ETL Tools, Data Cleaning, Data Cleansing, Data Analysis, Data Quality, Complex Data Analysis, Data Mapping, Query Optimization, Large Data Sets, Performance Optimization, Modeling, Data Build Tool (dbt), Azure Data Factory (ADF), Team Leadership, Pipelines, Microsoft Azure, HR Analytics, CSV File Processing, Computer Skills, Security, Forms, Oracle EBS, SaaS

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