Mid Backend Engineer (C# / .NET)

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. Your primary mission will be to drive the delivery of scalable system enhancements that expand business capabilities and support seamless multi\-brand operations. You will be responsible for designing and evolving a modular application architecture capable of handling flexible data models and growing operational demands. By improving the reliability, performance, and maintainability of our current solutions, you will ensure a sustainable platform evolution that accommodates future integrations and parallel initiatives. Additionally, you will play a key role in promoting structured knowledge transfer to strengthen internal ownership and foster long\-term development autonomy  **Key Responsibilities:** * Develop and maintain backend services and APIs using C\# and ASP.NET Core. * Support the implementation of microservices and integrations, following established architectural patterns. * Build and maintain RESTful APIs and contribute to event\-driven integrations (Azure Service Bus). * Implement background processing tasks using Azure Functions or similar tools. * Work with Azure SQL and Entity Framework Core for data access and persistence. * Follow coding standards and contribute to clean, maintainable, and testable code. * Apply security practices using authentication and authorisation standards (OAuth2/OIDC, JWT). * Contribute to CI/CD pipelines and support deployment processes. * Troubleshoot issues using logs and basic monitoring tools. * Collaborate with team members and participate in code reviews and technical discussions. **Required Skills and Qualifications:** * Experience with C\# and .NET (ASP.NET Core) * Understanding of RESTful APIs and backend development principles * Basic knowledge of microservices and integration patterns * Familiarity with Azure SQL and Entity Framework Core * Exposure to event\-driven systems or messaging concepts * Familiarity with Docker or cloud environments (Azure preferred) * Basic understanding of CI/CD concepts * Ability to debug and resolve common issues * Good communication skills and teamwork mindset * **Intermediate to advanced English** * Willingness to learn and improve continuously. * Good communication and collaboration skills. * Ability to follow guidance and deliver tasks reliably. * Positive attitude towards feedback and team collaboration. **Nice\-to\-have Skills:** * Exposure to Azure services (Service Bus, Functions, App Services). * Familiarity with Clean Architecture or CQRS concepts. * Basic understanding of authentication and security practices. * Interest in learning about observability and distributed systems. **Our benefits:** \-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! More details about our benefits here: https://ciandt.com/br/pt\-br/carreiras At CI\&T, inclusion starts at the first contact. If you are a person with a disability, it is important **to present your assessment during the selection process. *See which data needs to be included in the report by clicking here* . This way, we can ensure the support and accommodations that you deserve. **If you do not yet have the assessment, don't worry: we can support you in obtaining it. We have a dedicated Health and Well\-being team, inclusion specialists, and affinity groups who will be with you at every stage. Count on us to make this journey side by side.****