[Job -29825] Senior .NET Developer , Brazil

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. We are looking for a Senior .Net Developer to be part of our team! Responsibilities: Develop and maintain high-quality C# code across our microservices ecosystemImplement complex business logic for a large company in the food marketManage own priorities and performance to deliver high quality, highly performant solutionsDocumenting your work and contribute to continuous integration/continuous delivery (CI/CD) processesDevelop APIs that facilitate communication between our microservicesImplement messaging patterns for asynchronous communication between servicesIntegrate with external systems and databases while maintaining system integrityEnsure proper error handling and resilience in service communicationsWrite comprehensive unit and integration tests for C# componentsConduct code reviews to maintain code quality and architectural integrityTroubleshoot and resolve complex technical issues across the service ecosystemMentor junior developers in C# best practices and design patternsContribute to technical decision-making and architectural discussions Requirements: Professional experience with C# and .NET developmentStrong knowledge of .NET Core/5+ and ASP.NET Core Web APIExperience with microservices architecture and distributed systemsProficiency in asynchronous programming patterns in C# (Task, async/await)Advanced C# programming skills including LINQ, generics, and reflectionExperience with dependency injection and inversion of control patternsFamiliarity with ORM frameworks (Entity Framework Core)Knowledge of RESTful API design and implementationExperience with SQL Server and writing efficient queriesUnderstanding of data access patterns and transaction managementKnowledge of database performance optimization techniquesExperience with data serialization formats (JSON, XML)Proficiency in unit testing frameworks (xUnit, NUnit, or MSTest)Experience with mocking frameworks (Moq, NSubstitute)Familiarity with containerization using DockerAdvanced/fluent English Nice to Have: Understanding of CI/CD pipelines for .NET applicationsKnowledge of logging, monitoring, and observability in distributed systemsExperience with GraphQL in .NET applicationsKnowledge of authentication/authorization frameworks (Identity Server, JWT)Familiarity with CQRS and Mediator patternsExperience with internationalization and localization in .NETUnderstanding of domain-driven design principlesUnderstanding of test-driven development principlesKnowledge of continuous integration practices 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: [link removed]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 [link removed] 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 [link removed] 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. Originally posted on Himalayas