Rafael V.
Back-end and Systems Engineer

Skills

.NET

Oracle Database

Html

Javascript

Python

Rafael is available for hire

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Bio

Possessing extensive experience in software development since 2009, with a focus on C#/.NET and Relational Databases, delivering solutions that support over five million customers. Firmly advocates the critical contribution of Information Technology to societal development. Proficiencies include C#, XML, HTML, JavaScript, SQL ANSI, and backend development.

Intern
12/1/2007 - 6/30/2009

Developed advanced proficiency in PHP, JavaScript, Ajax, and HTML while significantly contributing to the development of the Public Sanitation Department management system. Demonstrated strong expertise in PostgreSQL for efficient data management and storage solutions. Played a critical role in several projects for the municipal government, ensuring robust, scalable, and reliable software solutions tailored to public sector needs.
Senior Software Developer
10/1/2009 - Present

Developed critical applications utilizing C#, JavaScript, and XML within a proprietary framework, adhering to service-oriented architecture and relational databases such as DB2 and Oracle. Comprehensive involvement in the full software development lifecycle, including requirements gathering, version control, unit testing, production deployment, maintenance, and user support.

Key projects include:

- Refactoring a legacy Accounting system from Clipper to a web application, using the internal framework to consume REST APIs for submitting, validating, and reporting information to regulatory and government authorities (since 2019).
- Assisted in developing a Bidding system for managing state government procurement (2016).
- Developed applications supporting the credit card issuing area to manage customer portfolios, providing backend services for mobile banking apps to manage billing and credit card travel notices (2015-2018).
- Transitioned an old Checking Account system from VB6 and PL1 to a web application, enhancing usability for business areas and introducing new features (2009-2014).

Proficient in utilizing a tech stack comprising C#, .NET, JavaScript, HTML, XML, JSON, REST APIs, and version control systems such as CVS and SVN. Extensive experience with DB2, Oracle, and ANSI SQL.
Software developer
8/1/2009 - 10/31/2009

Developed web applications to deliver services to a university hospital. Gained expertise in PHP and JavaScript while working extensively with PostgreSQL for database management. Ensured effective collaborative code maintenance and version control using Git.