[Job-27376] Senior .Net Engineer

Position Overview:

As a Senior Software Developer, you will work on the evolution and stability of a large-

scale, mission-critical POS platform, combining modern C# .NET development with the

maintenance of legacy components. This position focuses on SQL Server–driven

systems, production reliability and real-world problem solving in high-availability

environments.

The onboarding phase will take place in CI&T's office in Brazil, with an estimated

duration of 2 weeks. Therefore a valid passport and availability to travel abroad is

required for this position.

Key Responsibilities:

● Act as a key contributor to the support and evolution of applications built with C#

.NET and SQL Server, interacting with legacy components when necessary, and

contributing to the creation of innovative and robust solutions.

● Develop, debug, and optimize complex T-SQL stored procedures supporting critical

business workflows.

● Maintain and enhance Windows Services and background processes integrated

with external systems and hardware.

● Diagnose and resolve production issues in on-premises environments, ensuring

operational continuity.

● Collaborate with product, support, and engineering teams to deliver reliable and

scalable solutions.

● Contribute to modernization initiatives and continuous improvement of engineering

practices.

● Continuously maintain and enhance existing systems, identifying opportunities for

optimization and innovation.

Must-Have Skills:

● SQL Server: Proficiency in SQL Server, including database design, query

optimization, and data maintenance. Experience in evolving and maintaining

queries and procedures.

● C# .NET Framework: Strong experience building and maintaining WinForms

applications and Windows Services.

● Legacy Systems Exposure: Familiarity working with legacy codebases (including

Visual Basic 6).

● GIT Repository: Experience using GIT for code versioning, including branching,

merging, and conflict resolution.

● Clear and Effective Communication in English: Ability to convey information

concisely and understandably, facilitating team collaboration and understanding

with stakeholders.

● Proactivity and Autonomy: Ability to take the initiative in problem-solving and

manage tasks independently, delivering results efficiently.

Nice-to-Have Skills:

● Experience working with legacy systems and modernization efforts.

● Experience in supporting complex technical solutions

● Familiarity with COM/ActiveX integration.

● Cloud experience (Azure) or Infrastructure as Code (Terraform)., you will work on the evolution and stability of a large-

scale, mission-critical POS platform, combining modern C# .NET development with the

maintenance of legacy components. This position focuses on SQL Server–driven

systems, production reliability and real-world problem solving in high-availability

environments.

The onboarding phase will take place in CI&T's office in Brazil, with an estimated

duration of 2 weeks. Therefore a valid passport and availability to travel abroad is

required for this position.

Key Responsibilities:

● Act as a key contributor to the support and evolution of applications built with C#

.NET and SQL Server, interacting with legacy components when necessary, and

contributing to the creation of innovative and robust solutions.

● Develop, debug, and optimize complex T-SQL stored procedures supporting critical

business workflows.

● Maintain and enhance Windows Services and background processes integrated

with external systems and hardware.

● Diagnose and resolve production issues in on-premises environments, ensuring

operational continuity.

● Collaborate with product, support, and engineering teams to deliver reliable and

scalable solutions.

● Contribute to modernization initiatives and continuous improvement of engineering

practices.

● Continuously maintain and enhance existing systems, identifying opportunities for

optimization and innovation.

Must-Have Skills:

● SQL Server: Proficiency in SQL Server, including database design, query

optimization, and data maintenance. Experience in evolving and maintaining

queries and procedures.

● C# .NET Framework: Strong experience building and maintaining WinForms

applications and Windows Services.

● Legacy Systems Exposure: Familiarity working with legacy codebases (including

Visual Basic 6).

● GIT Repository: Experience using GIT for code versioning, including branching,

merging, and conflict resolution.

● Clear and Effective Communication in English: Ability to convey information

concisely and understandably, facilitating team collaboration and understanding

with stakeholders.

● Proactivity and Autonomy: Ability to take the initiative in problem-solving and

manage tasks independently, delivering results efficiently.

Nice-to-Have Skills:

● Experience working with legacy systems and modernization efforts.

● Experience in supporting complex technical solutions

● Familiarity with COM/ActiveX integration.

● Cloud experience (Azure) or Infrastructure as Code (Terraform).