[Job - 31359]Sr. Developer FullStack (.Net/React) , Brazil
Ci&T · Remoto, BR
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 **Our benefits:** * Health and dental insurance * Meal and food allowance * Childcare assistance * Extended paternity leave * Partnership with gyms and health and wellness professionals via Wellhub (Gympass) TotalPass; * Profit Sharing and Results Participation (PLR); * Life insurance * Continuous learning platform (CI\&T University); * Discount club * Free online platform dedicated to physical, mental, and overall well\-being * Pregnancy and responsible parenting course * Partnerships with online learning platforms * Language learning platform And many more! More details about our benefits here: https://ciandt.com/br/pt\-br/carreiras At CI\&T, inclusion starts at the first contact. If you are a person with a disability, it is important **to present your assessment during the selection process.** *See which data needs to be included in the report by* *clicking here*.This way, we can ensure the support and accommodations that you deserve. **If you do not yet have the assessment, don't worry: we can support you in obtaining it.** We have a dedicated Health and Well\-being team, inclusion specialists, and affinity groups who will be with you at every stage. Count on us to make this journey side by side.