He served as a Senior full-stack engineer, working on web-based applications. His backend responsibilities primarily involved Node.js with Typescript, RESTful APIs, GraphQL, and PostgreSQL as the database. He also utilized libraries and frameworks such as Sequelize, Express, and Apollo GraphQL.

On the frontend, he worked extensively with React and employed Jest for unit and integration tests. Additionally, he gained hands-on experience with Docker.

Backend Engineer – Golang | Fintech Project

• Developed and maintained backend services for a fintech platform using Golang, focusing on high-performance and reliability.
• Implemented RESTful APIs and integrated with databases to manage transactional and financial data securely.
• Applied testing strategies, including unit and integration tests, to ensure robust and error-free services.
• Optimized backend performance for scalability and low-latency processing in critical workflows.
• Collaborated with frontend engineers and product teams to define API contracts and system behavior.

Senior Full-Stack Engineer – JavaScript (React + Node.js)

• Developed and maintained backend services with Node.js, focusing on API design, database integration, and scalable architecture.
• Built full-stack web applications with React, ensuring seamless integration between frontend and backend systems.
• Designed and implemented RESTful and GraphQL APIs, connecting with databases and third-party services to support business logic.
• Applied JavaScript/TypeScript best practices and modern backend patterns for maintainable, high-performance code.
• Ensured reliability and quality through unit, integration, and end-to-end testing, alongside thorough code reviews.
• Optimized server performance, database queries, and overall system efficiency for scalable production environments.
• Contributed to CI/CD pipelines to automate builds, tests, and deployments, improving release speed and stability.

He served as a consultant responsible for designing and deploying the entire server infrastructure for the Confederação Brasileira de Tênis (Brazilian National Tennis Association) within the AWS environment. His work ensured that the infrastructure met performance, availability, and security requirements.

He worked as a Technical Instructor for software development courses, primarily focusing on Java, JavaScript, SQL, and Android Development.

• He joined e-Core in 2008 as a software developer and contributed to multiple RESTful and Web Services/JMS clustered projects requiring high performance, availability, and scalability. His server back-end implementations included the JEE stack with frameworks such as Spring, Hibernate, and Struts, leveraging Oracle databases. He also worked with Golang using MongoDB and contributed to mobile projects using Xcode/Objective-C and React Native, as well as front-end projects utilizing React.js.
• In 2011, he was promoted to Software Technical Lead, where he took on responsibilities spanning architecture and design through final implementation. He defined suitable patterns and frameworks, focusing on distributed architecture. He collaborated with the development team to provide technical guidance, ensure good practices, and assist with technical tasks. His duties also included mentoring and assisting in onboarding new team members.
• In 2012, he advanced to the role of Software Team Lead, managing teams of 6 to 12 software engineers. He acted as a facilitator between his team and upper management. He also managed outsourced teams, closely collaborating with customers to meet expectations and with the sales team to identify opportunities for expanding service offerings.
• Additionally, he partnered with Human Resources in screening, interviewing, scheduling, and hiring candidates.

He was responsible for the development, maintenance, and troubleshooting of most systems used by the Confederação Brasileira de Tênis (Brazilian National Tennis Association). These systems were built using the JEE stack with MySQL and Oracle as databases.

In addition to his development duties, he also handled tasks related to business analysis and served as the technical point of contact for the customer.

He developed e-commerce websites using PHP and MySQL.

He developed small management systems for customers, utilizing the JEE stack with MySQL as the database.