Cleiton Estefenon

Stackspot is a comprehensive ecosystem of tools and solutions for developers, designed to streamline, standardize, and accelerate software development by automating processes and improving efficiency. As a member of the Adoption Team, I facilitate the integration and adoption of the Stackspot EDP generative AI platform, which helps reduce the time to create new applications and provision infrastructure by up to 40%. Key Achievements: • Collaborate with product, engineering, and client teams to ensure the effective use of the platform's features, especially those based on Generative AI (Gen AI). My actions are crucial in transitioning traditional processes to modern, AI-powered solutions. • Assist Itaú Unibanco in exploring the full potential of our platform, resulting in up to 40% reduction in time spent writing repetitive code through the use of AI. • With my experience in Terraform and CI/CD pipelines, I contribute to the development and maintenance of custom plugins for the Stackspot EDP platform, aligned with specific client needs, ensuring consistency and scalability in development environments. • Deliver strategic presentations of the platform to Itaú Unibanco squads, encouraging the modernization of development processes, continuous integration, and enhanced efficiency in leveraging AI. My role goes beyond technical, driving digital transformation within the organization. • My focus is to encourage a culture of innovation and digital transformation, not only through the implementation of cutting-edge technologies, but also by empowering teams to adopt new tools and agile development methodologies, contributing to the continuous evolution of the Stackspot EDP platform. JAVA | SPRING BOOT | AWS | TERRAFORM | DEVOPS PRACTICES | RELATIONAL DATABASES | NOSQL DATABASES | CI/CD | GIT

As a Full Stack Software Engineer, I specialize in backend development, designing, building, and optimizing robust systems using Java (8, 11, 17, and 21), Spring Boot, GraalVM, and AWS. While my primary focus is on creating high-performance, scalable backend solutions, I have also contributed to the development of user interfaces with React, ensuring seamless integration between the frontend and backend. My role extends beyond implementation to include identifying opportunities for system optimization, enhancing reliability. Much of this experience has been applied to developing applications within the financial industry, where performance, scalability, and precision are critical. Key Achievements: • Refactored a data-intensive application for processing large CSV files, reducing processing time from over 12 hours to an average of 15 minutes, significantly improving efficiency. • Defined and documented the database architecture for a new application, ensuring scalability and maintainability. • Optimized external API querying processes, reducing the need for external data searches by over 90%, resulting in faster and more reliable operations. • Developed a serverless application using GraalVM, Java 21, and Spring Boot 3, achieving an impressive cold start time of 550 milliseconds, enhancing responsiveness. • Contributed to React-based UI development, assisting in the creation of intuitive interfaces while ensuring seamless backend integration, aligning with business and user needs. • Leveraged Terraform to provision and manage AWS resources, enabling consistent and reliable infrastructure as code practices. • Collaborated with cross-functional teams to deliver scalable, end-to-end solutions, with a strong emphasis on backend system design and performance optimization. FULL STACK | JAVA | SPRING BOOT | REACT | AWS | TERRAFORM | DEVOPS PRACTICES | RELATIONAL DATABASES | NOSQL DATABASES | CI/CD | GIT

• Developed innovative solutions for the e-commerce sector using Java, Spring Boot, Oracle, and RabbitMQ, focusing on platform optimization and continuous improvement. • Gained expertise in designing scalable and robust microservices, ensuring reliability and performance to support high-traffic demands. • Collaborated in agile teams utilizing the Scrum framework, delivering features quickly and efficiently while maintaining high product quality. • Adopted best practices and implemented reusable code strategies, driving e-commerce growth and enhancing the shopping experience for customers. • Played a key role in projects integrating payment and logistic systems, ensuring seamless and accurate information flow across critical e-commerce components. JAVA | SPRING BOOT | AWS | TERRAFORM | DEVOPS PRACTICES | RELATIONAL DATABASES | NOSQL DATABASES | CI/CD | GIT

• Redesigned and modernized a legacy ERP system, focusing on scalability and performance improvements. • Developed a robust digital signatures module using Java, Spring Boot, React, and AWS, ensuring compliance with security standards and enhancing system capabilities. • Implemented and refined frontend features using React, delivering intuitive and responsive user interfaces that enhanced the user experience and streamlined workflows. • Researched and implemented Proof of Concepts (POCs) leveraging AWS S3 to migrate document storage from the database, resulting in: • Significant reduction in RDS costs. • Improved application performance and efficiency. • Acted as a key member of an agile team, contributing to technical strategies and driving continuous improvement initiatives. • Collaborated with the Product Owner (PO) to: • Refine priorities and align development efforts with long-term business goals. • Balance the delivery of new features, dependency updates, and resolution of technical debt. JAVA | SPRING BOOT | AWS | TERRAFORM | DEVOPS PRACTICES | RELATIONAL DATABASES | NOSQL DATABASES | CI/CD | GIT | REACT