Sr. Developer FullStack (.Net/React) , Brazil

CI&T; Brasil; Presencial; BRL 180 000 - 300 000; Tempo integral

Vantagens oferecidas por esta oferta de emprego

Health and dental insurance

Meal and food allowance

Extended paternity leave

Wellhub Gympass TotalPass partnerships

Profit Sharing and Results Particip.

Life insurance

CI&T University learning platform

Discount club

Well-being platform access

Pregnancy and parenting courses

Online learning platform partnerships

Language learning platform

Resumo da oferta

CI&T is seeking a Fullstack Developer with a strong frontend focus (70%) and solid backend skills (30%). You will build high-quality features across the full stack using .NET8, C#, and React, collaborating closely with product, design, and engineering teams.

The role involves implementing responsive UIs, reusable components, RESTful APIs, and a clean architecture with MediatR, AutoMapper, and EF Core. Experience with Docker, queues, and cloud services is valued.

Qualificações

• Strong frontend with React focusing on responsive, accessible interfaces.
• Backend capabilities with .NET8 and C# and RESTful API development.
• Experience with MediatR, AutoMapper, EF Core, and CQRS patterns.
• Familiarity with messaging/queueing (Rebus, Azure Service Bus) and Docker.
• Database experience with PostgreSQL and MongoDB; unit and integration testing.
• Experience with Azure DevOps, GitFlow, and CI/CD pipelines.

Responsabilidades

• Develop and maintain responsive UI with React.
• Build scalable backend services using .NET8 and C#.
• Create RESTful APIs and business logic with clean architecture.
• Write unit and integration tests; generate test data with Faker/Bogus.
• Collaborate with product, design, and engineering teams.

Conhecimentos

Frontend development

Backend development

React

C#

RESTful APIs

Unit testing

Ferramentas

React

.NET 8

C#

MediatR

AutoMapper

EF Core

PostgreSQL

MongoDB

xUnit

Faker (Bogus)

NSubstitute

Azure DevOps

GitFlow

Azure Pipelines

Docker

Azure Service Bus

Rebus

PostgreSQL

MongoDB

Descrição da oferta de emprego

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 aFullstack Developerwith a strong focus onfrontend development (70%)and solid backend skills(30%), working in a modern tech stack built on.NET8, C#, and React. You will build high-quality, scalable, and maintainable features across the full stack, collaborating closely with product, design, and engineering teams.

• Develop and maintain responsive, performant, and accessible user interfacesusingReact
• Implementreusable componentsfollowing best practices for scalability and maintainability
• Collaborate with UX/UI designers to translate designs into functional features
• Writeunit and integration testsfor frontend components
• Develop and maintainRESTful APIsand services using.NET8 and C#
• Implement business logic using theMediator pattern (MediatR)for clean and decoupled architecture
• UseAutoMapperfor efficient object-to-object mapping
• Implementasynchronous messagingwithRebusandAzure Service Bus
• Contribute to database design and queries usingPostgreSQLandMongoDB
• Writeunit testsusingxUnitand generate realistic test data withFaker (Bogus)
• Createtest doubles and mocksusingNSubstitute
• Work withAzure DevOpsfor project management, version control, and pipelines
• FollowGitFlowbranching strategy for organized and release-oriented development
• Contribute toAzure Pipelines(CI/CD) using YAML-based configurations
• Solid experience withReact(hooks, context, state management)
• Experience withcomponent-driven developmentand modern frontend architecture patterns
• Experience with.NET8 and C#for backend development
• Familiarity withMediatR, AutoMapper, and clean architecture principles
• Experience withmessaging/queueing systems(Rebus, Azure Service Bus, or equivalent)
• Experience withPostgreSQL— relational modeling and query optimization
• Experience withMongoDB— document-based modeling and aggregation
• Proficiency withEntity Framework Core (EF Core)
• xUnitfor unit and integration testing
• NSubstitutefor mocking and test doubles
• Faker / Bogusfor realistic test data generation
• Knowledge ofCQRScombined with MediatR
• Familiarity withDocker and containerization
• Exposure toAzure cloud services(App Services, Functions)
• Understanding ofDomain-Driven Design (DDD)principles
• Experience withmicro-frontend architecture

-Health and dental insurance

-Meal and food allowance

-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.