Join CI&T as a Senior .NET Engineer and help build reliable back-end solutions for complex business needs. You’ll collaborate with colleagues across Brazil, Colombia, the UK, and the US, communicating in English as part of a team working on technology-driven transformation and AI-enabled solutions.

Responsibilities

• Build and maintain back-end services using C#, ADO.NET, and SQL Server
• Develop and improve SOAP and REST APIs, following sound practices and versioning standards
• Strengthen service reliability through unit and integration testing, troubleshooting, and root-cause analysis
• Integrate systems and services using effective software design patterns
• Review code and mentor junior team members
• Contribute to CI/CD workflows and continuously improve development practices
• Stay informed about relevant technologies and industry trends

Required Qualifications

• Strong production experience with .NET Framework and .NET Core
• Solid knowledge of ADO.NET and SQL Server, including database design and performance tuning
• Experience developing SOAP and REST services, including XML serialization and deserialization
• Strong understanding of software design patterns and development best practices
• Advanced English proficiency
• Clear communication, collaboration, adaptability, and a proactive approach to continuous improvement

Nice to Have

• Experience with cloud platforms, preferably Azure
• Familiarity with specification-driven development or agentic approaches
• Exposure to Agile development methodologies

What We’re Looking For
You take ownership, communicate effectively with technical and non-technical colleagues, and work collaboratively toward shared outcomes. You’re comfortable navigating ambiguity and changing requirements while continuing to deliver thoughtful, reliable solutions.