Cesar Aguirre is a software engineer, lifelong learner, language enthusiast, and avid reader. Based in Colombia, he works remotely as a C# backend engineer and technical writer. With over 10 years of experience, he specializes in building APIs and backend code with .NET technologies, mainly C#, ASP.NET Core, and SQL Server. He helps teams grow high-quality, maintainable, and performant backend code. Cesar has worked in public services, electronic invoicing, and reservation management as a full-time employee and independent contractor. He shares his learning and programming experiences on his blog, which he considers his own time capsule. He is a cat owner, vim user, plain-text lover, and Zettelkasten practitioner. In his free time, he enjoys reading books and learning foreign languages.