Job Summary: We are seeking a Senior FullStack Developer to work on the development of an internal platform, focusing on innovative technological solutions and security. Key Highlights: 1. Balanced involvement between frontend and backend (50/50) 2. Participation across the entire development lifecycle 3. Collaboration with multidisciplinary agile teams Nice to meet you — we are Evertec! ✨ Evertec is a technology company specializing in financial services, with over 27 years of experience and presence in 26 countries across Latin America and the Caribbean. Processing over 11 billion transactions annually, we are a benchmark in solutions that drive digital transformation in the financial market. We offer a comprehensive portfolio of software solutions, serving financial institutions, enterprises, and fintechs seeking innovation, security, and efficiency. Our commitment lies in technological excellence, financial inclusion, and generating sustainable value for customers, employees, and partners—fostering a more connected and accessible ecosystem. Requirements: We are looking for a Senior FullStack Developer to work on the development of an internal dividend control platform. We seek an experienced professional with a solid backend foundation in .NET, expertise in building RESTful APIs, and knowledge of React for frontend development. **Responsibilities** Develop RESTful APIs using .NET (C#, .NET 6/7). Integrate with SQL Server databases, ensuring efficiency, security, and adherence to sound modeling practices. Develop frontend applications using ReactJS, integrating with APIs and ensuring a positive user experience. Participate across the entire development lifecycle: analysis, estimation, architecture, implementation, testing, and deployment. Collaborate with multidisciplinary teams within agile methodologies (Scrum/Kanban). Create and update technical documentation as needed. Balanced involvement: 50% frontend and 50% backend. Frontend development using React 16, with prior experience in earlier versions accepted. Experience in version migration will be considered a plus. **Technical Requirements (Mandatory)** Senior-level experience in C# and .NET (6/7). Proficiency in developing RESTful APIs. Strong knowledge of SQL Server (stored procedures, optimized queries, data modeling, indexes). Experience with ReactJS and its ecosystem (Hooks, Context, functional components). Practical experience with Git/GitFlow. Experience working with agile methodologies (Scrum/Kanban). Familiarity with API testing and validation tools such as Postman. Understanding of SOAP integrations when required. Knowledge of best practices: SOLID, Clean Code, version control, and basic CI/CD. Experience working in containerized environments (Docker). Knowledge of deployment on AWS EC2. **Desired Behavioral Competencies** Organization and autonomy: ability to independently manage a high volume of tasks. Strong communication skills with end users, translating technical concepts into accessible language. Relationship management with internal clients and collaboration with the team. Hybrid work model in the Saúde region, São Paulo – SP, or fully remote for candidates outside São Paulo – SP. **10-month temporary contract.**