Senior .NET Developer, VB6

CI&T

Senior Software Developer responsible for evolving applications in SQL Server and C#. Collaborating with teams to deliver robust solutions and improve engineering practices.

Posted 7/20/2026full-timeRemote • 🇧🇷 BrazilSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Proficient in SQL Server and C# .NET, with a strong focus on developing high-performance applications and optimizing existing systems. Demonstrates effective communication and proactive problem-solving skills while mentoring junior developers and collaborating with multidisciplinary teams.

Highest-signal resume keywords

SQL Server ProficiencyC# .NET MasteryREST API DevelopmentGIT Version ControlClear Communication

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

SQL ServerC#WCFWPFWindows ServicesWeb ServicesConsole ApplicationsWeb APIsREST APIsPerformance Optimization

Soft Skills

Clear CommunicationProactivityAutonomy

Tools & Technologies

GITWindows ServerIIS

Industry Keywords

Application DevelopmentPerformance ProfilingMulti-Tier ApplicationsDatabase IntegrationLayered Architecture

Tech Stack

Tools & technologies

.NETSQLWPF

About the role

Key responsibilities & impact

Act as a key player in the support and evolution of applications developed in SQL Server and C# .NET, contributing to the creation of innovative and robust solutions.
Seek and prioritize continuous improvement of processes and engineering practices, mentoring junior developers and promoting a learning environment.
Perform a fundamental role in the architecture and development of systems, ensuring high performance and scalability in the implemented solutions.
Focus on the impact of solutions and user experience, ensuring that applications meet client needs.
Collaborate with multidisciplinary teams to design, develop, and implement efficient and high-quality solutions.
Continuously maintain and enhance existing systems, identifying opportunities for optimization and innovation.

Requirements

What you’ll need

SQL Server: Proficiency in SQL Server (2016 or later), including creation of stored procedures, functions, views, tables, and indexes. Experience with query performance optimization, SQL profiling, and optimization techniques.
C# .NET: Mastery of C# language and .NET Framework versions, with experience in WCF, WPF, Windows Services, Web Services, Console Applications, and Web APIs.
Windows Forms & MVC: Experience with database integration, data loading patterns, and layered architecture (Business layer, Service layer, Data Access layer).
REST APIs: Experience developing REST APIs, including JSON payload handling and deserialization, HTTP headers, status codes, and authentication mechanisms.
GIT Repository: Experience using GIT for code versioning, including branching, merging, and conflict resolution.
Clear and Effective Communication: 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 with production support, application monitoring, and performance profiling tools.
Knowledge of Windows Server administration, IIS configuration, and debugging complex multi-tier applications.

Benefits

Comp & perks

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!