Open to opportunities

Carlos Javier

@carlosjavier

Message

I build scalable full-stack web applications with .NET, Django, React, and Next.js.

Dominican Republic

Message

What I'm looking for

I'm looking for a remote full-stack engineering role where I can build scalable distributed systems, improve API performance, and deliver seamless React and Next.js user experiences.

At WebMasterDO, I build and maintain high-performance backend services with C# ASP.NET Web API and Django, supporting daily active users with a focus on availability.

I've improved high-traffic API performance through Redis caching and SQL Server query optimization, reducing execution time by up to 40%. I also design OpenAPI-based RESTful APIs used by more than 12 developers and implement automated tests with 80%+ code coverage.

For NiteLoc, I built scalable Django and DRF booking APIs designed to prevent double-booking under concurrent requests. I modeled event, booking, and financial-reporting data, automated weekly reporting to reduce manual effort by about 90%, and cut query load by 30–50%.

I enjoy connecting robust backend systems with responsive React and Next.js experiences, using TypeScript, PostgreSQL, Redis, Celery, and AWS to deliver scalable products.

Experience

Work history, roles, and key accomplishments

Current

Full-Stack Web Developer

Current

WebMasterDO

Jan 2022 - Present (4 years 8 months)

Developed and maintained high-performance backend services using C# (ASP.NET Web API) and Django, supporting 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%.