I am a Software Developer with over 3 years of professional experience, specializing in back-end development with Java and Spring. I have also worked as a full-stack developer and on data projects.Currently, I work as a freelancer on software development and web page projects, data analysis and engineering, machine learning, and artificial intelligence applications.I began my journey in the field of technology and programming by enrolling in the technical course in Informatics at Cefet/RJ, where I studied HTML, CSS, JavaScript, C, C++, Java, SQL, and UML to design and develop complete systems, from client-side visual parts to server-side logic. Subsequently, I started my bachelor's degree in Computer Engineering, where I deepened my knowledge in mathematics and programming. During this period, I gained my first professional experiences as a developer, working on a scientific initiation project and an internship.In addition to academic courses, I have always sought to improve my knowledge and skills through various online courses, especially through bootcamps and nanodegrees.Skills:• Front-end: HTML, CSS, JavaScript, TypeScript, Bootstrap• Back-end: REST API, MVC, SOAP, GraphQL, ORM, CRUD• Data: SQL, MySQL, PostgreSQL, H2, SQLServer, NoSQL, MongoDB, Redis, Microsoft Power BI• DevOps: Docker, Shell Script, CI/CD, AWS, Git, GitHub• Java: Spring Framework, Spring Boot, Quarkus, Hibernate, JUnit, Mockito, JPA, JDBC• Python: Django, Flask, FastAPI, Streamlit, Pandas, Numpy, Scikit-learn, Matplotlib, Seaborn, Plotly, Jupyter Notebook• JavaScript: Node.js, Express.js, Fastify.js, Vue.js, React.jsCertifications:• AWS Certified Cloud Practitioner (CLF-C02)Portfólio: https://leonardosimoes.streamlit.app/ GitHub: https://github.com/leosimoes