Leonardo S.

Front-end UX Engineer

FullStack Developer
5/1/2023 - Present

Oversaw the migration of a legacy application backend to modern technologies to enhance performance and maintainability. Developed proficiency in Python and Django for backend development and utilized PostgreSQL for database management, replacing the outdated systems. Implemented RESTful APIs to facilitate seamless communication between services. Employed Docker for containerization, ensuring consistent and scalable deployments across various environments. Applied Kubernetes for orchestration, significantly improving the system's reliability and resource optimization. Utilized Jenkins for continuous integration and continuous deployment (CI/CD), streamlining the development workflow and reducing deployment times. Mastered Git for version control, ensuring collaborative and efficient code management.

Mid-Level Frontend Developer
3/1/2022 - 5/1/2023

Led the development and refactoring of a Progressive Web Application (PWA) tailored for companies in the consortium sector. Enhanced technical expertise in front-end technologies, ensuring robust and scalable design. Leveraged modern web tools and frameworks to optimize performance, usability, and maintainability of the application. Focused on integrating advanced features in a modular and efficient manner, enabling seamless user experiences across various devices.

Frontend Developer
1/1/2022 - 3/1/2022

Led the refactoring of a legacy system for the administration area within the electricity supply sector. Developed and honed skills in PHP and Doctrine, enabling efficient data handling and ORM integration. Utilized Silex for streamlined PHP micro-framework applications. Conducted extensive work on front-end technologies such as Ext JS 4.2 and Vue.js, enhancing the system’s user interface and user experience. Employed NodeJS for server-side development, improving back-end processing. Leveraged PostgreSQL and MongoDB databases to ensure robust and scalable data storage solutions. Ensured smooth and collaborative code maintenance using version control systems like SVN and Git, fostering a cohesive development environment.

Mid-Level Front-end Developer
1/1/2021 - 9/1/2021

Led the development of a Backoffice system for a Fintech company, focusing on a comprehensive system refactor to improve performance and maintainability. Created foundational components that streamlined further development processes and ensured consistency across the application. Provided training and mentorship to new team members, enabling smooth integration into the project and efficient contribution to development tasks. Utilized expertise in cloud-based architectures, microservices, and modern programming languages to execute the project successfully. Advocated for best coding practices and facilitated collaborative workflows using version control systems such as Git.

FullStack Developer
9/1/2020 - 1/1/2022

Contributed to the development of a robust portal for the management and registration of health plans, incorporating dynamic field technology to enhance user experience and adaptability. Led the development of a comprehensive web system designed to control integrations and microservices, ensuring streamlined communication between various system components. Gained substantial experience in implementing Kanban and Scrum methodologies, effectively managing projects and promoting agile workflows. Actively involved in training and mentoring new team members, fostering a collaborative and knowledgeable team environment. Technical expertise includes the use of various programming languages, development frameworks, and database systems essential for these projects.

Freelance Web/Mobile Developer
1/1/2020 - 8/1/2020

Led the development of a comprehensive portal and mobile application for business management, leveraging advanced technical skills in JavaScript frameworks and mobile development environments. Demonstrated a high level of proficiency in Angular for building dynamic, single-page web applications, and utilized React Native for cross-platform mobile app development. Effectively implemented RESTful API integrations to ensure seamless communication between the frontend and backend systems. Managed backend services using Node.js, and maintained a robust database architecture with MongoDB and MySQL. Prioritized code quality and collaborative development by adhering to best practices in version control through Git. Employed Agile methodologies to enhance project management efficiency and ensure timely delivery of features. Consistently optimized application performance and user experience through rigorous testing and debugging, utilizing tools like Jest and Selenium for automated testing processes.

Intern
5/1/2019 - 12/1/2019

Acquired expertise in developing and maintaining a comprehensive portal for the submission and evaluation of academic papers. This role involved utilizing AngularJS for a dynamic and responsive front-end experience, paired with PHP for robust back-end functionality. Developed and refined skills in building user-friendly interfaces, ensuring seamless interaction between students and faculty. Enhanced understanding of database management and server-side processing, contributing to the overall efficiency and reliability of the portal.

Computer Science at Federal University of Technology - Paraná
2016 - 2022