Jelther Oliveira Goncalves

Note: Company and institution names have been anonymized for privacy. Full details are available upon request.

Experience#

Senior Software Developer at a cybersecurity company#

Location: Remote, Canada
Period: August/2025 - Present

Activities:

  • Develop and maintain backend services and data engineering pipelines supporting FinOps (cloud cost management) initiatives on an AWS-based stack.
  • Build and operate data workflows using AWS Glue and MWAA (Managed Workflows for Apache Airflow) to process and transform usage and cost data into Amazon Redshift.

Tech Stack:

Python, AWS S3, AWS MWAA (Apache Airflow), AWS Redshift, AWS Glue

Senior Data Engineer at an energy services company#

Location: Remote, USA
Period: July/2024 - April/2025

Activities:

  • Developed and maintained PySpark data pipelines on Azure Databricks to provide structured data for machine learning models.
  • Improved DevOps by streamlining delivery pipelines using Databricks Bundles, enhancing team efficiency and collaboration.

Tech Stack:

Databricks (PySpark), Python, SQL, Azure

Senior Software Engineer at a food delivery company#

Location: Winnipeg, Manitoba, Canada
Period: May/2022 - December/2023
Work environment: Remote

Activities:

  • Maintained data orchestration tools on a data platform based on Apache Airflow, used by 200+ users.
  • Served as a team member for the implementation of DBT in migrating from Redshift to GCP BigQuery.
  • Provided data support for users in using, debugging, and improving ETL pipelines.

Tech Stack:

Python, Apache Airflow, Google Cloud Platform, DBT, GitHub Actions, Kubernetes

Senior Software Engineer at a fraud prevention company#

Location: Sao Paulo, Sao Paulo, Brazil
Period: November/2017 - May/2022
Work environment: Remote

Activities:

  • Provided technical leadership and mentoring for Data and Analytics engineering teams, responsible for managing 15+ engineers.
  • Designed and developed a data platform used by 500+ users for both transactional and analytical big data purposes.
  • Trained 100+ data platform users to enhance their usage and understanding of the big data ecosystem.

Tech Stack:

Python, Azure, SQL Server, MySQL, PostgreSQL, C#, Databricks, PySpark, Docker, Kubernetes, Azure Eventhub, Argo Workflow, Apache Airflow, Influxdb, Grafana, KQL.

Software Developer at a public university#

Location: Campinas, Sao Paulo, Brazil
Period: November/2010 - November/2017 (7 years)
Work environment: In-office

Activities:

  • Responsible for the maintenance, development, and implementation of electronic medical record systems, covering everything from patient appointments to vaccine management.
  • Served as a support leader for end users, assisting with general activities.
  • Acted as the technical leader for the IT department, providing guidance on everything from infrastructure planning to software development.

Tech Stack:

Visual Basic 6, PHP, Laravel, Subversion, Code Igniter, MySQL, SQL Server, PostgreSQL, Javascript, jQuery, Windows and Linux sys admin.

Software Developer at a university foundation#

Location: Campinas, Sao Paulo, Brazil
Period: August/2009 - November/2010 (1 year 4 months)
Work environment: In-office

Activities:

  • Developed internal company ERP from financial modules to legal department modules.

Tech Stack:

Delphi, Oracle

Information Technology Intern at a power management company#

Location: Valinhos, Sao Paulo, Brazil
Period: March/2008 - August/2009 (1 year 6 months)
Work environment: In-office

Education#

Certificate in Data Mining and Machine Learning at a public university#

2024

Bachelor of Applied and Computational Mathematics at a public university#

2009 - 2015

Diploma in Computer Science at a technical high school#

2005 - 2007