[Job - 32379] Mid-Level Fullstack Developer (.NET / Next.JS), Brazil

Ciandt; Brazil; Remote; BRL 120,000 - 180,000; Full time

Benefits offered by this job

Health and dental insurance

Meal and food allowance

Childcare assistance

Extended paternity leave

Wellhub (Gympass) TotalPass access

Life insurance

Continuous learning platform

Job summary

CI&T Brazil is seeking a Mid-Level Full-Stack Developer to strengthen backend services using C#/.NET, while contributing to frontend work with Next.js, React, and TypeScript. Join a monorepo in an Agile team delivering high-quality, tested code.

You will collaborate closely with clients, integrate with analytics and reporting tools, and uphold coding standards across backend and frontend components, leveraging modern cloud databases and CI/CD practices.

Qualifications

• 3+ years working as a backend developer with C# and .NET
• Experience building and maintaining RESTful APIs
• Knowledge of Entity Framework Core (or similar tools)
• Experience with databases like Azure SQL or SQL Server
• Understanding of DI, SOLID principles, and layered architecture
• Experience with React, TypeScript, and Next.js (full-stack capable)
• Experience with Git and writing tests
• Ability to read and understand large, complex code projects
• Strong English level to work with global clients and teams

Responsibilities

• Build and maintain backend services using ASP.NET Core (.NET 8) and EF Core
• Create and connect RESTful APIs (following project patterns)
• Write frontend code using Next.js 14, React 18, and TypeScript
• Connect with reporting and analytics services
• Collaborate with clients and teams to understand requirements
• Follow project code standards and architecture
• Write unit and integration tests to ensure correctness
• Review peers' code and help improve team output
• Work in an Agile team delivering tested code regularly

Skills

Backend development

RESTful APIs

English communication

Tools

Entity Framework Core

Azure SQL

SQL Server

Next.js

React

TypeScript

Git

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.

Mid-Level Full-Stack Developer

This platform helps professionals understand and use data about programs and accreditation.

In this job, you will:

• Work with a C# and .NET backend
• Work with Next.js frontends
• Work in a monorepo (one big project with many parts)

Your main skill should be backend development with C# and .NET. You will also write frontend code, but your strongest area should be the backend.

What You Will Do:

• Build and maintain backend services using ASP.NET Core (.NET 8) and Entity Framework Core
• Create and connect RESTful APIs (following the existing patterns in the project)
• Write frontend code using Next.js 14, React 18, and TypeScript
• Connect with reporting and analytics services
• Talk directly with the client and other teams to understand what they need
• Learn and follow the project’s code standards and architecture
• Write tests (unit tests and integration tests) to check if the code works correctly
• Review other developers’ code and help improve the team’s work
• Work in an Agile team, delivering finished and tested code regularly

What You Need to Know:

• 3+ years working as a backend developer with C# and .NET
• Experience building and maintaining RESTful APIs
• Knowledge of Entity Framework Core (or similar tools)
• Experience with databases like Azure SQL or SQL Server
• Understanding of dependency injection, SOLID principles, and layered architecture
• Experience with React, TypeScript, and Next.js (willing to work across full-stack)
• Experience with Git and writing tests
• Ability to read and understand large, complex code projects
• Strong communication skills and advanced English level (to work with global clients and teams)

Nice to Have:

• Experience with Microsoft Azure services (like Azure SQL)
• Knowledge of NoSQL databases (like Azure Cosmos DB)
• Experience with BI/reporting tools (Power BI, Tableau, or similar)
• Experience with application monitoring (Application Insights, Serilog, or similar)
• Experience with monorepo tools (Turborepo, npm workspaces)
• Knowledge of Tailwind CSS or component libraries (shadcn/ui, Radix UI)
• Experience with CI/CD pipelines (Azure DevOps)
• Understanding of authentication (OAuth 2.0, JWT, MSAL)

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. 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.