Senior .NET Developer

Description

Job Summary: A leading IT company is seeking a Senior .NET Developer for a system development, evolutionary maintenance, and support project, with a focus on the Microsoft ecosystem. Key Highlights: 1. Join a project focused on development and evolutionary maintenance. 2. Assume technical ownership of complete modules. 3. Collaborate with technical, functional, and business area teams. A leading IT company is currently seeking a Senior .NET Developer to join a project focused on development, evolutionary maintenance, and system support, working with Microsoft ecosystem technologies. We are looking for a senior-level, autonomous professional with solid experience in C#, .NET, ASP.NET Core Web API, SQL Server, Azure DevOps, and Clean Architecture, capable of assuming technical ownership of complete modules and collaborating with technical, functional, and business area teams. Main Responsibilities: • Design, develop, and maintain .NET / C# services and APIs following Clean Architecture principles. • Work with layered architecture: Domain, Application, Infrastructure, and Presentation. • Design, optimize, and maintain SQL Server queries, data models, and stored procedures. • Manage versioning, branches, Pull Requests, and pipelines in Azure DevOps. • Provide second- and third-level support for production systems, including incident analysis, hotfixes, and evolutionary improvements. • Collaborate with functional analysts and stakeholders to translate business requirements into high-quality technical solutions. • Use AI-assisted tools such as Claude Code, Copilot, Cursor, or others to support development, refactoring, documentation, and testing tasks. Requirements: • 5+ years of experience developing with C# / .NET. • 4+ years of experience building APIs with ASP.NET Core Web API. • 4+ years of experience working with SQL Server, including T-SQL, stored procedures, indexes, and query optimization. • Experience with Entity Framework Core. • Experience with Azure DevOps: Repos, Boards, Pipelines, and Artifacts. • Proficiency in Git, Pull Requests, and collaborative workflows. • Solid knowledge of Clean Architecture, DDD, and SOLID principles. • Proficiency in Visual Studio / Visual Studio Code. Desirable: • Experience in the complementary insurance industry, collective health plans, or ISAPREs. • Knowledge of regulations related to healthcare, ISAPREs, GES, or the Superintendence of Health. • Experience using AI-assisted tools in real-world development workflows. • Knowledge of Azure services: App Services, Azure SQL, Storage, Key Vault, Service Bus, or Functions. • Experience with Docker and containerized deployments. • Knowledge of Hangfire, MassTransit, message queues, or background jobs. • Experience with automated testing using xUnit, NUnit, or integration tests. • Technical reading English. Conditions: • Work Mode: 100% on-site. • Location: Providencia, near Pedro de Valdivia Metro Station. • Contract Type: Indefinite-term contract. • Hiring: Direct employment with the IT client. Kibernum participates solely in the recruitment and selection process. If you have senior-level .NET development experience and seek to join a technically challenging project leveraging the Microsoft stack, Clean Architecture, and a strong focus on software quality, apply with us! -Requirements- Minimum Education: University / Professional Institute / Technical Training Center. 4 years of experience Keywords: developer, programmer, dotnet, net, net, senior, sr