Mid-Level Fullstack Developer (.NET / Next.JS), Brazil

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 hiring a Mid-Level Full-Stack Developer for a team that builds and improves a platform for education. 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 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.

Work arrangement
Yes