Carlos Javier

Full-Stack Software Engineer with 4 years of experience building high-performance distributed systems. Expert in bridging robust C#/.NET and Django backends with modern React/Next.js frontends to deliver seamless, scalable user experiences.

Full-Stack Web Developer at WebMasterDO (2022-01 – Present)

• Developed and maintained high-performance backend services using C# (ASP.NET Web API) and Django, which supported daily active users with a focus on high availability.
• Improved performance and scalability of high-traffic APIs by implementing Redis caching and optimizing SQL Server queries, reducing execution time by up to 40%.
• Designed and deployed RESTful APIs following OpenAPI specifications, facilitating seamless integration with React and Next.js frontends; APIs are now used by over 12 developers across teams.
• Implemented automated unit tests to ensure 80%+ code coverage and prevent regressions during deployment

Specialization in Advanced Django Specialization – Coursera

Specialization in Python for Everybody Specialization – Coursera