.NET Developer Senior, 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 Senior .NET Engineer to join our team and help build complex back-end software solutions. You will work with a multicultural team spread across Brazil, Colombia, the UK, and the USA. All communication will be in English.
As a Senior .NET Engineer, you will design solutions, help guide less experienced developers, and help the team adopt new technologies and best practices.
What You Will Do
Design, build, and maintain back-end services using C#, ADO.NET, and SQL Server
Create and improve SOAP and REST APIs (following best practices and version standards)
Write unit tests and integration tests to make sure services work correctly
Find and fix problems in the code (root-cause analysis)
Help integrate different systems and services together (using software design patterns)
Review other developers’ code and provide guidance to junior team members
Learn about new technologies and find ways to improve our current solutions
Work on CI/CD workflows (automated testing and deployment) to improve how the team works
What You Need to Know
Strong experience with .NET Framework and .NET Core in real production systems
Deep knowledge of ADO.NET and SQL Server
Experience with database design and making databases work faster
Hands-on experience building SOAP and REST APIs
Ability to work with XML (reading and writing XML data)
Strong understanding of software design patterns and best practices
Advanced English proficiency
Ability to work well in multicultural, fast-paced teams
Soft Skills
Takes ownership of your work and always looks for ways to improve
Communicates clearly with both technical and non-technical people
Works well with others and values the team’s success
Can adapt when requirements change or situations are unclear
Nice to Have
Experience with cloud platforms (preferably Azure)
Knowledge of specification-driven development (building code based on clear requirements)
Exposure to Agile development methods
Understanding of modern software development approaches
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