---
title: "[Job - 31359]Sr. Developer FullStack (.Net/React) , Brazil"
company: "CI&T"
company_url: "https://www.remjobs.works/companies/ci-t"
url: "https://www.remjobs.works/job/ci-t-job-31359-sr-developer-fullstack-net-react-brazil-39b58f21-e800-4413-8b9e-b2101a371b76"
apply_url: "https://jobs.lever.co/ciandt/74ac2aca-7d6a-4c84-ad5e-dbaa8cc16d92"
workplace: remote
location: "Brazil"
remote_scope: "Brazil"
employment_type: other
seniority: senior
role: software-engineering
region: latin-america
skills: ["azure", "csharp", "docker", "javascript", "mongodb", "postgres", "react", "typescript"]
date_posted: 2026-08-28T13:38:27.462Z
first_seen_by_remjobs: 2026-09-15T15:52:37.851Z
---

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

**CI&T** · Brazil

Apply: https://jobs.lever.co/ciandt/74ac2aca-7d6a-4c84-ad5e-dbaa8cc16d92

## About the role

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](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](https://docs.google.com/presentation/d/12BqYLIGeEyp9t0ZdF2b4bvnjFLza4E8fmbcowWeBlfk/edit?slide=id.g3a9cf52bf2b_0_0#slide=id.g3a9cf52bf2b_0_0)*[.](https://docs.google.com/presentation/d/12BqYLIGeEyp9t0ZdF2b4bvnjFLza4E8fmbcowWeBlfk/edit?slide=id.g3a9cf52bf2b_0_0#slide=id.g3a9cf52bf2b_0_0)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.

---

Source: CI&T's own career page, read by RemJobs. Canonical HTML version: https://www.remjobs.works/job/ci-t-job-31359-sr-developer-fullstack-net-react-brazil-39b58f21-e800-4413-8b9e-b2101a371b76