Open to opportunities

Jean Michél Marca

@jmmarca

Message

Senior Software Engineer specializing in full-stack web development and scalable backend systems.

Brazil

Message

What I'm looking for

I seek remote roles as backend/full-stack projects, improve architecture and deliver scalable, well-tested systems.

I am a Senior Software Engineer with over 18 years building full-stack and backend systems, delivering solutions across Java, JavaEE, Spring Boot, React/Angular and Python ecosystems. I focus on clean architecture, microservices and performance improvements for high-volume applications.

In my current role at PUC-Rio I led traceability and data migration efforts (over 1M records), moved stateful systems to stateless REST APIs with JWT, and developed scalable job processing with MongoDB and Redis. I have a track record of improving legacy systems, front-end libraries, and integration routines for complex enterprise environments.

I value teamwork, quality and timely delivery, and I continually drive automation, testing and CI/CD practices. I am passionate about solving challenging problems, mentoring colleagues, and creating maintainable, high-performance software.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

Pontifícia Universidade Católica do Rio de Janeiro

Aug 2021 - Present (4 years 3 months)

Designed and migrated legacy data traceability for critical systems, moving over 1M records to MongoDB and converting stateful integrations to stateless REST APIs with JWT, improving scalability and integration performance.

Java Spring Boot MongoDB RabbitMQ Redis Angular Gradle REST APIs

Senior Software Engineer

Secretaria de Saúde

Dec 2017 - Aug 2021 (3 years 8 months)

Led development of internal control panel, Moodle integration and Electron.js chat integrated with Active Directory, and automated system integrations to improve IT operations and communication.

PHP Laravel Electron Active Directory Python Linux SharePoint MySQL Shell Scripting

Senior Software Engineer

Wealth Systems

May 2017 - Dec 2017 (7 months)

Built a React.js frontend library for a new CRM and optimized legacy system queries to improve performance with large data volumes; fixed cross-platform upload bug for mobile.

React Redux JavaScript Jest Enzyme Accessibility PostgreSQL Jenkins

Full Stack Engineer

Smartbr – Soluções Tecnológicas

May 2009 - May 2017 (8 years)

Developed financial modules, WMS and TEF integrations, and implemented asynchronous REST integrations between POS and backend, supporting CRM/ERP growth and operational reliability.

JPA Hibernate RESTful APIs Oracle PostgreSQL Jenkins Maven Scrum

Full Stack Engineer

Instituto São Paulo - ISP

Apr 2008 - May 2009 (1 year 1 month)

Created a PHP-based framework to reduce onboarding time and improved CRM performance, cutting page load from ~10s to <4s through query and AJAX optimizations.