Walter Paixão Cortes, Database Developer in Porto Alegre - State of Rio Grande do Sul, Brazil
Walter Paixão Cortes

Database Developer in Porto Alegre - State of Rio Grande do Sul, Brazil

Member since March 3, 2016
Walter is a senior software engineer with 23+ years of experience in software development. He's proactive, focused on results, always has the customer in mind, and is an expert in troubleshooting issues. He's worked on a variety of projects ranging from small to large, local or global—using project management techniques like Scrum.
Walter is now available for hire


  • Dell Technologies
    Python, Angular, Vue.js, Bulma, Oracle, MongoDB, PostgreSQL
  • Dell
    OBIEE, Oracle, Teradata, Python
  • Dell
    .NET, Oracle, SQL Server



Porto Alegre - State of Rio Grande do Sul, Brazil



Preferred Environment

Visual Studio Code, GitHub on Linux or Win10

The most amazing...

...program that I've coded was a service that collects articles related to InhA enzyme and does textual analysis to extract data about macromolecules.


  • Product Designer

    2019 - PRESENT
    Dell Technologies
    • Developed two products using a method that combines lean, UCD, and XP to deliver fast and high-value results to our customers.
    • Helped the team to find solutions using design-thinking techniques.
    • Created user interfaces that have high usability, are innovative, responsive, and reactive using Angular and/or Vue.js and Bulma.
    • Used Python asynchronous framework FastAPI to develop the back end, supported by other technologies like Redis, RabbitMQ, and Cloud Foundry.
    Technologies: Python, Angular, Vue.js, Bulma, Oracle, MongoDB, PostgreSQL
  • Software Development Advisor

    2009 - 2019
    • Developed the human resources data lake using the Hadoop technology stack.
    • Supported the human resources data warehouse using the OBIEE technology stack.
    • Supported the Oracle Web Center (OWC) technology stack for a document repository.
    • Provided support for the human resources data warehouse using the Business Objects (SAP-BO) technology stack.
    • Supported the development of portfolio management tools for IT.
    Technologies: OBIEE, Oracle, Teradata, Python
  • Senior Software Development

    2005 - 2008
    • Maintained multiple .NET applications for the Product Group (PG).
    • Supported the development team as an application DBA on Oracle and SQL Server technologies.
    Technologies: .NET, Oracle, SQL Server
  • Senior Software Engineer

    2003 - 2005
    • Developed multiple web applications for the Accenture customers.
    • Acted as an application DBA on Oracle databases for the Accenture customers.
    • Built an ASP.NET framework to speed-up and standardize the development efforts for all development teams at one Accenture customer.
    Technologies: ASP.NET, C#, Oracle, MS SQL
  • Senior Software Engineer

    2001 - 2003
    Bankorp Consultores Associados
    • Developed ASP web applications for the state IRS office.
    • Built ASP.NET web applications for the state government.
    • Created an EAD solution in ASP.NET.
    • Constructed a document store web application in ASP.NET for many customers.
    Technologies: Classic ASP, ASP.NET, Visual Basic, VBScript, MS SQL


  • DB-InhA (Development)

    DB-InhA is a bioinformatics tertiary database which contains all the relevant information to the InhA enzyme. It is divided into two streams: a responsive web application that allows querying of the information and a service that collects information and applies some basic curation techniques.

    Technologies: Bootstrap, Python (Flask), MySQL

  • Tableau Visualizations (Development)

    I have a few Tableau visualizations that I made both for scientific and commercial purposes. Here I'm making available 4 that are not under NDA.

  • Riverlite Dashboard Application (Development)

    I developed a dashboard application, using Bootstrap and Python (Flask), to show incident management metrics—collecting the data via an API from their PRTG server.

  • wCREF Portal (Development)

    wCREF is a responsive web portal to support the use of the CREF method for protein 3D structure prediction.

    Technologies: Bootstrap, Python (Flask), MySQL

  • HR Analytics (Development)

    HR Analytics is a data warehouse which is built on top of OBIEE and comprised of ETL processes developed in Informatica Power Center; it also has a database modeled on top of Oracle 11g and the reports and dashboard were developed in OBIEE.


  • Languages

    Python 3, C#, PHP
  • Libraries/APIs

    Google Sheets API, Zoho API, Flask-RESTful, Beautiful Soup, eBay API
  • Tools

  • Paradigms

    ETL, Kanban, Scrum
  • Platforms

    Pivotal Cloud Foundry (PCF), Oracle Database, Oracle, Azure
  • Other

    Data Modeling, Data Gathering, APIs, Data Engineering, Certified Scrum Master, Web Scraping, Data Scraping, Screen Scraping
  • Frameworks

    Flask, ASP.NET MVC 5, Scrapy
  • Storage

    Microsoft SQL Server, Cassandra, MySQL, PostgreSQL, Data Lakes


  • Doctorate in Computer Science
    2015 - 2020
    Pontifical Catholic University of Rio Grande do Sul - Porto Alegre, Brazil
  • Master's degree in Computer Science
    2013 - 2015
    Pontifical Catholic University of Rio Grande do Sul - Porto Alegre, Brazil


  • Certified ScrumMaster (CSM)
    Scrum Alliance

To view more profiles

Join Toptal
Share it with others