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

CI&T; Brasil; Presencial; BRL 279 000 - 469 000; Tempo integral

Vantagens oferecidas por esta oferta de emprego

Health insurance

Meal allowance

Childcare assistance

Wellbeing platform

Profit sharing

Life insurance

Continuous learning (CI&T University)

Gym/Wellness partnerships

Discount club

Online wellbeing platform

Resumo da oferta

CI&T is seeking a Fullstack Developer focused on frontend (70%) with strong backend skills (30%). You will build features using .NET8, C#, and React in a modern stack, collaborating with product, design, and engineering teams.

Qualifications include React, TypeScript, MediatR, AutoMapper, Rebus, Azure Service Bus, PostgreSQL, MongoDB, EF Core, xUnit, NSubstitute, and Azure DevOps. Knowledge of CI/CD, Docker and DDD is a plus.

Qualificações

• Develop and maintain responsive, accessible UIs with React.
• Build reusable components for scalable frontends.
• Collaborate with UX/UI designers to translate designs.
• Ensure cross-browser compatibility and performance.
• Write unit and integration tests for frontend components.
• Develop RESTful APIs and services with .NET8/C#.
• Apply MediatR, AutoMapper for clean architecture.
• Use Rebus and Azure Service Bus for messaging.
• Work with PostgreSQL and MongoDB databases.
• Create test data with Faker/Bogus and mocks with NSubstitute.

Responsabilidades

• Build high-quality, scalable frontend features in a full-stack context.
• Collaborate with product, design and engineering teams.
• Contribute to code reviews and maintain code quality standards.
• Implement asynchronous messaging and data access patterns.
• Participate in CI/CD pipelines with Azure DevOps and YAML.

Conhecimentos

React

JavaScript/TypeScript

.NET8 & C#

MediatR

AutoMapper

Azure DevOps

Git & GitFlow

Azure Pipelines

PostgreSQL

MongoDB

EF Core

xUnit

NSubstitute

Faker/Bogus

Rebus

Azure Service Bus

Frontend architecture

Component-driven development

Ferramentas

.NET8

C#

React

MediatR

AutoMapper

Rebus

Azure Service Bus

PostgreSQL

MongoDB

EF Core

xUnit

NSubstitute

Faker/Bogus

Azure DevOps

Git

GitFlow

Azure Pipelines

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 a Fullstack Developer with a strong focus on frontend 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.

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 .NET8 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 .NET8 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.