APIs & Backend Development
The backend is the invisible engine of your digital business. If your API is slow or billing isn't integrated — your business suffers.
Get a quote →Why your business needs solid backend
DGII electronic billing is mandatory in DR. Local payment gateways need specific integration. A well-built backend makes it all reliable, fast, and maintainable.
What's included
Documented REST APIs with NestJS and TypeScript
DGII electronic billing (e-CF) integration
Payment gateways: Azul, CardNet, PayPal, Stripe
PostgreSQL and MongoDB databases
JWT authentication, roles, permissions
Swagger/OpenAPI documentation
Automated testing
Docker deployment on Vercel, AWS, or your server
Backend services I offer
Backend solutions for your DR business
REST API from scratch
Complete API with auth, database, documentation, deployment.
DGII billing integration
Connect your system with e-CF providers. Law 32-23 compliance.
Payment gateway integration
Azul, CardNet, or PayPal connected to your site or system.
Mobile app API
Full backend for React Native apps. Auth, push notifications, cloud storage.
How I build APIs
Definition
Define endpoints, data structure, and integrations needed.
Architecture
Design database and API structure. Documented before coding.
Development
Build with NestJS, TypeScript, best practices.
Documentation
Auto-generated Swagger docs.
Testing
Integration, load, and security testing.
Deployment
Production deployment with monitoring and auto-scaling.
Frequently Asked Questions
How much does an API cost?
From $1,500 for a complete API. Specific integrations from $500.
Do you integrate DGII billing?
Yes. I connect your system with authorized e-CF providers.
Which payment gateways?
Azul, CardNet, PayPal, Stripe. Any combination you need.
Do you provide documentation?
Yes. Swagger/OpenAPI docs plus written developer documentation.
Need an API or integration? Let's talk.
Let's talk →