We are **tech transformation** specialists, uniting human expertise with AI to create scalable tech solutions. With over 7,400 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. Hello there! 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 ecosystem Implement complex business logic for a large company in the food market Manage own priorities and performance to deliver high quality, highly performant solutions Documenting your work and contribute to continuous integration/continuous delivery (CI/CD) processes Develop APIs that facilitate communication between our microservices Implement messaging patterns for asynchronous communication between services Integrate with external systems and databases while maintaining system integrity Ensure proper error handling and resilience in service communications Write comprehensive unit and integration tests for C\# components Conduct code reviews to maintain code quality and architectural integrity Troubleshoot and resolve complex technical issues across the service ecosystem Mentor junior developers in C\# best practices and design patterns Contribute to technical decision\-making and architectural discussions **Requirements:** Professional experience with C\# and .NET development Strong knowledge of .NET Core/5\+ and ASP.NET Core Web API Experience with microservices architecture and distributed systems Proficiency in asynchronous programming patterns in C\# (Task, async/await) Advanced C\# programming skills including LINQ, generics, and reflection Experience with dependency injection and inversion of control patterns Familiarity with ORM frameworks (Entity Framework Core) Knowledge of RESTful API design and implementation Experience with SQL Server and writing efficient queries Understanding of data access patterns and transaction management Knowledge of database performance optimization techniques Experience 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 Docker Advanced/fluent English **Nice to Have:** Understanding of CI/CD pipelines for .NET applications Knowledge of logging, monitoring, and observability in distributed systems Experience with GraphQL in .NET applications Knowledge of authentication/authorization frameworks (Identity Server, JWT) Familiarity with CQRS and Mediator patterns Experience with internationalization and localization in .NET Understanding of domain\-driven design principles Understanding of test\-driven development principles Knowledge of continuous integration practices **Our benefits include:*** Premium Healthcare * Meal voucher * Maternity and Parental leaves * Mobile services subsidy * Sick pay\-Life insurance * CI\&T University * Colombian Holidays * Paid Vacations And many others. Collaboration is our superpower, diversity unites us, and excellence is our standard. We value diverse identities and life experiences, fostering a diverse, inclusive, and safe work environment. We encourage applications from diverse and underrepresented groups to our job positions. We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.