Jefferson S.

Back-end and Systems Engineer

Senior Software Developer Analyst
1/2/2017 - 1/2/2018

Developed expertise in the TOTVS healthcare information system (HIS) while working at one of the largest hospitals in Brazil. Acquired advanced skills in software development including design, implementation, and support of healthcare applications. Employed SQL for database management and executed complex queries to enhance data retrieval processes. Utilized Java and JavaScript for backend and frontend development respectively, ensuring seamless integration and a robust user experience. Contributed to system optimization, improving the efficiency and accuracy of hospital operations. Engaged in debugging, troubleshooting, and resolving software issues to maintain system reliability. Collaborated closely with multidisciplinary teams to gather requirements and deliver customized solutions that align with the hospital’s operational needs.

Software Engineering
1/2/2013 - 1/2/2015

As an Industrial and Automation Software Engineer, developed advanced technical proficiency in the design, implementation, and maintenance of automation systems. Engineered solutions using diverse software and technologies, including expert use of C++ and Python for system programming and scripting. Gained extensive experience in designing and deploying PLC (Programmable Logic Controller) systems with Siemens and Allen Bradley technologies. Effectively utilized SCADA (Supervisory Control and Data Acquisition) systems for real-time monitoring and control.

Showcased skills in HMI (Human-Machine Interface) development, creating intuitive and efficient user interfaces for industrial applications. Applied expertise in industrial communication protocols such as Modbus, Profibus, and Ethernet/IP, ensuring seamless integration of various automation components. Mastered the use of simulation tools like MATLAB and Simulink for model-based design and testing purposes.

Displayed a strong understanding of industrial network configurations, ensuring optimal and secure communication pathways. Leveraged data analysis tools to enhance system performance and predictive maintenance routines. Managed version control and collaborative project work using Git, ensuring robust code management and teamwork efficiency. Delivered projects with a focus on robustness, efficiency, and user-centric design while adhering to industry standards and safety regulations.

.NET Developer
1/2/2013 - 1/2/2013

Developed proficiency in C#, .NET Framework, and ASP.NET. Expertly managed and optimized SQL Server databases, ensuring efficient data storage and retrieval. Built robust web applications using AngularJS and React for front-end development. Demonstrated advanced knowledge in Entity Framework and LINQ for streamlined data access and manipulation. Utilized Azure DevOps for continuous integration and continuous deployment (CI/CD) pipelines. Applied principles of Agile and Scrum methodologies to manage projects and deliver high-quality software solutions. Leveraged RESTful APIs for seamless integration between different services. Ensured code quality and maintainability with comprehensive unit and integration testing using NUnit and Moq. Maintained version control and facilitated code reviews using Git and GitHub. Enhanced performance and scalability of applications through the implementation of multi-threading and asynchronous programming techniques.

Android Developer
1/2/2012 - 1/2/2013

Developed proficiency in mobile and web development, showcasing expertise with frameworks such as React Native, Swift, and Kotlin for mobile applications and React.js, Angular, and Vue.js for web applications. Demonstrated technical acumen with backend technologies including Node.js, Express, and Ruby on Rails. Proficient in database management using PostgreSQL, MongoDB, and Firebase. Skilled in version control and collaborative code maintenance with Git, adhering to best practices in code review and continuous integration/continuous deployment pipelines.

Managed projects from inception to deployment, employing Agile methodologies to ensure timely and within-budget delivery. Conducted thorough analysis of project requirements, facilitating effective communication between stakeholders and development teams. Leveraged tools such as JIRA and Trello for project tracking and workflow optimization. Developed strong problem-solving skills and the ability to architect scalable solutions. Enhanced user experience through meticulous attention to UI/UX design principles and tools such as Figma and Sketch. Demonstrated capabilities in functional and automated testing using frameworks like Jest, Cypress, and Selenium.

Key accomplishments include leading multiple cross-functional teams to successfully deliver high-traffic web applications and feature-rich mobile apps, driving user engagement and satisfaction. Excelled in creating detailed project documentation and providing training sessions to ensure smooth team onboarding and knowledge transfer.

.NET Developer
1/2/2011 - 1/2/2012

Developed and maintained web services, ensuring robust performance and scalability. Provided development support in a production environment, addressing urgent issues and optimizing system operations. Gained expertise in advanced tools and frameworks, contributing to high-quality code and seamless integration across various platforms. Engaged in continuous improvement efforts, fostering a culture of collaboration and innovation within the team.

PHP Developer
1/2/2010 - 1/2/2011

Developed proficiency in PHP and frameworks like Doctrine and Silex while playing a pivotal role in constructing an internal development framework. Extensive experience with front-end technologies such as Ext JS 4.2, NodeJS, and Vue.js. Demonstrated strong database management skills utilizing PostgreSQL and MongoDB. Ensured effective and collaborative code maintenance practices by using version control systems like SVN and Git.

PHP Developer
1/2/2008 - 1/2/2009

Developed systems using PHP with MVC structure. Acquired skills in ASP, VB6, Javascript, and the .Net platform through extensive training and development activities. Gained experience in managing and interacting with databases such as Oracle and DB2.

Information Systems at Our Lady of the Angels Cenecist College
2012 - 2015