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USD
I will build a scalable rest API backend with nestjs node js or java
Danny Bernal
Acerca de este Servicio
Need a reliable backend for your web or mobile app? I will design and build a clean, scalable REST API ready for production.
I am a Backend Developer with 5+ years of experience building enterprise software, mainly with Node.js, NestJS, TypeScript and PostgreSQL. I can also build backends in Java.
What I can build:
- REST APIs and microservices
- JWT authentication, roles and permissions
- PostgreSQL or MySQL database design with TypeORM
- Integrations with third party APIs and webhooks
- Message queues and event-driven flows with RabbitMQ
- Docker setup and API documentation with Swagger
What you get:
- Clean, modular and maintainable source code
- Validation and error handling
- Unit tests with Jest (Premium package)
- Clear instructions to run and deploy the project
Please message me before ordering with a short description of your project, so I can confirm the scope and the right package for you.
I communicate in written English.
Conoce a Danny Bernal
Danny Bernal
Backend and Full Stack Developer, AI Assisted Development
- DeColombia
- Miembro desdeoct 2026
Idiomas
Español, Inglés
Backend and Full Stack Developer with 5+ years of experience building enterprise software. I specialize in Node.js, NestJS, TypeScript and PostgreSQL: REST APIs, system integrations, process automation and event-driven architectures with RabbitMQ.
I use AI-assisted development (Cursor, Claude, OpenSpec spec-driven workflows) to analyze requirements, design, implement, refactor and test faster, always keeping technical review over AI-generated code.
I deliver clean, maintainable and scalable solutions. I work in Spanish and communicate in written English.
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FAQ
What do you need from me to start?
A short description of your project, the main features or endpoints you need, your preferred database, and any designs, docs or existing code you already have.
Do you deploy the API to a server?
All packages include instructions to run the project, and the Standard and Premium packages include a Docker setup. Deployment to your own server or cloud can be added with a custom offer.
Can you work on an existing project?
Yes. I can add new endpoints or modules to your existing Node.js, NestJS or Java backend, following your current structure and coding style.
