Job Summary: We are looking for a Junior Systems Developer to support the development and maintenance of the Backoffice, contributing to the evolution of the platform and commercial features in a dynamic environment. Key Highlights: 1. Support the development and maintenance of the Backoffice 2. Contribute to the evolution of the platform and commercial features 3. Work in a dynamic and collaborative environment We are seeking a Junior Systems Developer to support the development and maintenance of our Backoffice, directly contributing to the evolution of the platform and commercial features. The candidate will work alongside the Product and Business teams, supporting continuous improvements, integrations, and application stability. If you love technology, have a collaborative mindset, and want to grow technically within a dynamic environment, this opportunity may be for you! **Responsibilities and Duties** * Develop and maintain front\-end features (HTML, CSS, and Vanilla JavaScript) * Integrate with REST APIs for data consumption and submission * Support the implementation of new commercial features in the Backoffice * Fix bugs and perform continuous performance improvements * Provide technical support for requests from the Product and Business teams * Support integrations with external services * Use Git for code versioning **Requirements and Qualifications** * Minimum 1 year of experience in this role * Completed undergraduate degree * Knowledge of HTML5, CSS3, and Vanilla JavaScript * Experience with MySQL database * Basic understanding of REST API consumption and integration * JSON manipulation * Code versioning with Git * Basic understanding of mobile device responsiveness * Knowledge of programming logic * Basic understanding of debugging and error analysis in web applications **Preferred Qualifications** * Knowledge of plain PHP following the MVC pattern * Experience with React JS * Familiarity with modern development environments (e.g., Vite or similar) * Experience integrating external services **Additional Information** **Contract Type:** PJ **Work Model:** Hybrid – 4 days on-site and 1 day remote per week **Work Location:** São Paulo – Vila Mariana At Tecsa Group, our purpose is simple: care for people to build a healthier future. We know health is an ongoing journey, which is why we create technological solutions that significantly and sustainably impact people's lives. Every project we develop is designed to deliver quality of life, longevity, and well-being—not only for our clients but also for their families and communities. We aim to be the driving force transforming healthcare in Brazil and beyond—making it accessible, innovative, and human-centered.