[Job - 30181] .NET Senior VB6, Brazil
AI Summary
Senior Software Developer (.NET) at CI&T, responsible for supporting and evolving SQL Server and C# .NET applications, architecting scalable systems, mentoring junior developers, and collaborating with multidisciplinary teams to deliver high-quality solutions.
About this role
At CI&T, we help large enterprises transform the potential of AI into real business impact with AI Deployment, AI-native execution, and tech-integrated business solutions.
With 30 years of experience in technological transformation, we accelerate innovation with expertise in Agentic SDLC, Application modernization, Data & AI, Martech and Business strategy.
We are 8,000 CI&Ters across more than 25 countries, collaborating to build solutions with real impact. AI is already part of how we work, evolve, and innovate every day.
Key Responsibilities:
- 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.
Must-have Skills:
- 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.
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Skills
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- Market overviewState of tech hiring, September 2026: up 4.8%Tech hiring rose 4.8% month over month in September 2026, with 411,122 new listings. Customer support and account executive roles led the growth.