CI&T

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

Brazil full-time Mid Salary not listed
full-time Mid level Technology & IT Curated
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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 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:
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.
Originally posted on Himalayas

Interview prep

Walk in with sharper answers.

Use this as a quick practice sheet before you speak with the employer.

Mid
Technology & IT API integration Business Development CSS Data Analysis Javascript Mid level

Likely questions

  1. Tell us about work you have done that is close to the [Job - 32379] Mid-Level Fullstack Developer (.NET / Next.JS), Brazil role.
  2. How would you approach your first 30 days at CI&T?
  3. Which of API integration, Business Development and CSS have you used recently, and what did it help you achieve?
  4. Describe a time you solved a problem without waiting to be told exactly what to do.
  5. How do you handle busy days, changing priorities, or pressure at work?

Prepare before the call

  • A recent example that proves your experience with API integration, Business Development and CSS.
  • One short story with a problem, your action, and the result.
  • Two examples that show the strengths listed on your CV.
  • A clear reason why this role and company interest you.
  • Your availability, preferred work style, and salary expectations.

Ask them

  • What would success look like in the first 90 days?
  • What are the main problems this hire should help solve?
  • How does the team give feedback and measure good work?
  • What does a normal working week look like for this role?
Practice line

I am interested in the [Job - 32379] Mid-Level Fullstack Developer (.NET / Next.JS), Brazil role because I can bring practical experience in API integration, Business Development and CSS, learn the team quickly, and contribute to the outcomes CI&T needs from this hire.

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