Ci&t

[Job-] Senior .NET Developer, Brazil

Brazil Full Time
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:

  • Strong experience with C# and .NET Framework 4.8 in production environments.

  • Hands-on experience with ASP.NET Web API 5.3 and ASP.NET MVC 5.2.

  • Solid understanding of RESTful services, SOAP/WCF, and system integration patterns.

  • Experience building Windows desktop applications using WinForms and/or WPF.

  • Proficiency with SQL Server and Entity Framework (EF 6.2 / EF Core 2.2).

  • Experience implementing the Repository Pattern for structured data access.

  • Practical knowledge of Windows Services and job scheduling with Quartz.

  • Familiarity with file-based integrations (XML, CSV), message queues, and FTP workflows.

  • Basic understanding of CI/CD practices and application containerization concepts.

  • Ability to troubleshoot legacy and distributed systems, analyse logs, and resolve performance issues.

  • Advanced English.

 

Nice-to-have Skills:

  • Experience working across both modern and legacy .NET applications within the same ecosystem.

  • Familiarity with maintaining long-running enterprise background services.

  • Comfort working with mixed integration patterns (API, file transfer, messaging).

  • Experience participating in modernisation or migration initiatives within .NET environments.

  • Hands-on experience with OAuth 2.0, IdentityServer3, ASP.NET Identity, and Azure AD.

 
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