Juan Diego Rincon Franco

I’m a backend developer focused on designing microservices and REST APIs with NestJS and TypeScript, applying SOLID and Clean Architecture to keep systems maintainable and scalable. I build reusable business-logic layers to reduce the learning curve for development teams.

In my current role, I design and develop microservices and REST APIs with NestJS and TypeScript over Oracle DB, and I implement unit tests with Jest to achieve over 80% coverage in key modules. I’m also hands-on with Docker-based delivery and practical backend engineering from requirements to deployment.

Previously, as a remote fullstack/backend freelancer, I designed backend architectures for e-commerce clients, integrating PostgreSQL and MongoDB, and documented REST APIs using Swagger to align smoothly with frontend teams using React. I’ve implemented security with JWT and data validation, and I enjoy pushing robustness through patterns like SAGA for consistency in distributed systems. In my projects, I’ve built a multi-tenant SaaS Tenant Platform API with RBAC, rate limiting with Redis, and audit logging.