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Felipe Ferreira

@felipeferreira2

Message

I build resilient Java backend solutions for telecommunications systems and service integrations.

Brazil

Message

I'm currently building and maintaining Java backend solutions for telecommunications systems at CPQD, following my transfer from Trópico Telecomunicações while remaining on the same project team.

Across CPQD and Trópico, I've developed REST and SOAP integrations, implemented OAuth2/JWT authentication, and built a DLQ retry solution to prevent permanent failures for recoverable requests.

I've automated deployments with Python and GitLab CI/CD, migrated teams from SVN to Git, and created Grafana dashboards that support performance analysis and failure detection.

Earlier, I delivered full-stack applications with Node.js, React, PHP, PostgreSQL, MongoDB, MySQL, and AWS, including services using Lambda, S3, RDS, and EC2.

Experience

Work history, roles, and key accomplishments

Current

Backend Developer

Current

CPQD

Jan 2026 - Present (9 months)

Develop and maintain backend solutions for telecommunications systems using Java, Spring Framework, REST APIs, SOAP, and PostgreSQL. Implemented a retry solution for requests stored in the Dead Letter Queue (DLQ), improving message-processing resilience.

Java Spring Framework Tomcat REST APIs SOAP Web Services PostgreSQL Docker Gitlab CI Grafana OAuth2 JWT

Backend Developer

Trópico Telecomunicações

Dec 2020 - Dec 2025 (5 years)

Developed and maintained backend applications in Java for telecommunications systems, including integrations with external services. Implemented OAuth2/JWT authentication, REST interfaces, and CI/CD pipelines.

Java Spring Framework Tomcat JBoss REST APIs SOAP Web Services PostgreSQL Docker Gitlab CI Grafana OAuth2 JWT PHP Python MySQL

Full-Stack Developer

Kroonos

May 2020 - Dec 2020 (7 months)

Developed and maintained backend services using Node.js and frontend applications using React. Designed and optimized data structures in PostgreSQL and MongoDB.

JavaScript NodeJS React MongoDB PostgreSQL REST APIs WebSockets

Full-Stack Developer

Yes! Certificações

Aug 2019 - Apr 2020 (8 months)

Developed and maintained backend services using PHP with CodeIgniter and frontend interfaces using jQuery and Bootstrap. Integrated applications with AWS services.

PHP MySQL AWS Elastic Beanstalk S3 EC2 CodeIgniter jQuery Bootstrap

Full-Stack Developer

AML

Jul 2018 - Jul 2019 (1 year)

Developed and maintained backend services using PHP and frontend interfaces using jQuery and Bootstrap. Maintained AWS Lambda functions and used S3 and RDS for storage and database management.

PHP MySQL AWS Lambda S3 RDS jQuery Bootstrap