[Job - 31359]Sr. Developer FullStack (.Net/React) , Brazil

Job description

At CI&T, we help large enterprises transform the potential of AI into real business impact with AI Deployment, AI-native execution, and tech-integrated business solutions. With 30 years of experience in technological transformation, we accelerate innovation with expertise in Agentic SDLC, Application modernization, Data & AI, Martech and Business strategy. We are 8,000 CI&Ters across more than 25 countries, collaborating to build solutions with real impact. AI is already part of how we work, evolve, and innovate every day. We are looking for a **Fullstack Developer** with a strong focus on **frontend development (70%)** and solid backend skills **(30%)**, working in a modern tech stack built on ***.NET* 8, *C#*, and React**. You will build high-quality, scalable, and maintainable features across the full stack, collaborating closely with product, design, and engineering teams. **Requisitos:** - Develop and maintain **responsive, performant, and accessible user interfaces** using **React** - Implement **reusable components** following best practices for scalability and maintainability - Collaborate with UX/UI designers to translate designs into functional features - Ensure **cross-browser compatibility** and performance optimization - Write **unit and integration tests** for frontend components - Develop and maintain **RESTful APIs** and services using ***.NET* 8 and *C#*** - Implement business logic using the **Mediator pattern (MediatR)** for clean and decoupled architecture - Use **AutoMapper** for efficient object-to-object mapping - Implement **asynchronous messaging** with **Rebus** and **Azure Service Bus** - Contribute to database design and queries using **PostgreSQL** and **MongoDB** - Write **unit tests** using **xUnit** and generate realistic test data with **Faker (Bogus)** - Create **test doubles and mocks** using **NSubstitute** - Participate in **code reviews** to uphold code quality standards - Work with **Azure DevOps** for project management, version control, and pipelines - Follow **GitFlow** branching strategy for organized and release-oriented development - Contribute to **Azure Pipelines** (CI/CD) using YAML-based configurations - Solid experience with **React** (hooks, context, state management) - Proficiency in **JavaScript / TypeScript** - Experience with **component-driven development** and modern frontend architecture patterns - Experience with ***.NET* 8** and ***C#*** for backend development - Familiarity with **MediatR, AutoMapper**, and clean architecture principles - Experience with **messaging/queueing systems** (Rebus, Azure Service Bus, or equivalent) - Experience with **PostgreSQL** — relational modeling and query optimization - Experience with **MongoDB** — document-based modeling and aggregation - Proficiency with **Entity Framework Core (EF Core)** - **xUnit** for unit and integration testing - **NSubstitute** for mocking and test doubles - **Faker / Bogus** for realistic test data generation - **Azure DevOps, Git, GitFlow, Azure Pipelines, Azure Service Bus** **Diferenciais:** - Knowledge of **CQRS** combined with MediatR - Familiarity with **Docker and containerization** - Exposure to **Azure cloud services** (App Services, Functions) - Understanding of **Domain-Driven Design (DDD)** principles - Experience with **micro-frontend architecture** #LI-AM2