[Job-] Senior .NET Developer, Brazil
Ciandt
Posted: March 18, 2026
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Quick Summary
Design and develop scalable .NET solutions for business capabilities and multi-brand operations, focusing on evolution of application architecture for flexibility and growth.
Required Skills
Job Description
We are tech transformation specialists, uniting human expertise with AI to create scalable tech solutions.
With over 8,000 CI&Ters around the world, we’ve built partnerships with more than 1,000 clients during our 30 years of history. Artificial Intelligence is our reality.
We are looking for a Senior .NET Developer to design and deliver scalable system enhancements that expand business capabilities and support multi-brand operations. This role will focus on evolving application architecture for flexibility and growth, while improving the reliability, performance, and maintainability of existing solutions. Additionally, you will play a key role in enabling future integrations and promoting knowledge sharing to strengthen team autonomy and long-term ownership.
Required Skills:
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Strong experience with C# and .NET Framework 4.8 in production environments.
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Hands-on experience with ASP.NET Web API 5.3 and ASP.NET MVC 5.2.
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Solid understanding of RESTful services, SOAP/WCF, and system integration patterns.
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Experience building Windows desktop applications using WinForms and/or WPF.
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Proficiency with SQL Server and Entity Framework (EF 6.2 / EF Core 2.2).
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Experience implementing the Repository Pattern for structured data access.
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Practical knowledge of Windows Services and job scheduling with Quartz.
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Familiarity with file-based integrations (XML, CSV), message queues, and FTP workflows.
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Basic understanding of CI/CD practices and application containerization concepts.
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Ability to troubleshoot legacy and distributed systems, analyse logs, and resolve performance issues.
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Advanced English.
Nice-to-have Skills:
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Experience working across both modern and legacy .NET applications within the same ecosystem.
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Familiarity with maintaining long-running enterprise background services.
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Comfort working with mixed integration patterns (API, file transfer, messaging).
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Experience participating in modernisation or migration initiatives within .NET environments.
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Hands-on experience with OAuth 2.0, IdentityServer3, ASP.NET Identity, and Azure AD.
#LI-GP1
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.