[Job - 32379] 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)

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