Leandro Junio O. Email & Phone Number

Campinas, São Paulo, Brazil

São Paulo, Brasil

- Orbitall Payments cards team:Orbital segment responsible for card processing and issuance.- Responsibilities:Developing and maintaining Java APIs utilized across all card services provided by Orbitall.Building web applications integrated with Java APIs.Occasionally utilizing AWS ecosystem for development and deployment of Node.js APIs.Gathering requirements, designing system architectures, conducting testing and deployment and maintaining comprehensive documentation.- Notable Projects:Played a key role in the development of a voucher card transaction authorizer using JPOS framework (ISO8583) integrated with an HSM.- Stacks and technologies:Back-end: Java (8/11/17), Node.js, Spring Boot, JPOS, ISO8583, Tomcat, REST.Front-end: JSF, Prime Faces, WebSphere.Tests: JUnit, Mockito, SonarQube.Databases: NoSQL (DynamoDB), SQL (Oracle).Methodologies: Agile (Scrumban).Cloud Services: AWS (CloudWatch, S3, SQS, SNS, KMS, SSM, API Gateway, CloudFormation, Lambda, Serverless).Version Control: Git (GitLab, Code Commit).

São Paulo, Brasil

- Orbitall Payments banking team:Orbital segment responsible for providing banking services (BaaS).- Responsibilities:Developed and maintained Node.js APIs utilized in the banking scope.Utilized the full AWS ecosystem for development, integration and deployment.Gathered requirements, designed system architectures, conducted testing and deployment, and maintained comprehensive documentation.- Notable Projects:Spearheaded the development of an entire ecosystem responsible for handling judicial requests from the Central Bank of Brazil.- Stacks and technologies:Back-end: JavaScript (Node.js), REST, SOAP.Cloud Services: AWS (CloudWatch, S3, SQS, SNS, KMS, SSM, API Gateway, CloudFormation, Lambda, Serverless).Databases: NoSQL (DynamoDB, Redis).Methodologies: Agile (Scrum).Version Control: Git (GitLab, Code Commit).

São Paulo, Brasil

- Orbitall Payments banking support team:Team responsible for providing technical support, and occasionally developing APIs, for customers using banking services provided by Orbitall.- Responsibilities:Provided technical support through JIRA tickets to banking customers.Developed and maintained Node.js APIs using AWS platform.Automated data processing tasks using JavaScript.- Stacks and technologies:Back-end: JavaScript (Node.js).Cloud Services: AWS (CloudWatch, DynamoDB, Lambda, Serverless).Databases: NoSQL (DynamoDB).Methodologies: Agile (Scrum).Version Control: Git (GitLab).

Luziânia, Goiás, Brasil

An extracurricular project created by Information Systems students and presented annually at UNDESC's career fair.- Helped maintaining the web application.- The project was implemented as a PHP monolith, using Laravel, Docker and connected to a MySQL database.