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Fiverr Pro
English
$
USD
I will develop a backend rest api with node js, nest js


Javier C
About this gig
Is your backend slow to build, hard to maintain, or breaking on authentication?
I build REST APIs with Node.js, NestJS, TypeScript and PostgreSQL. I focus on the parts that usually fail later: authentication, validation, error handling, and a structure your team can keep working on.
What you get:
- REST endpoints (CRUD) with input validation
- PostgreSQL schema, relations and migrations
- JWT authentication (register, login, protected routes, refresh tokens)
- Clear error handling and HTTP status codes
- Swagger/OpenAPI docs you can test from the browser
- Full source code with setup instructions
Also available: roles and permissions, Stripe payments, third-party APIs, AI integrations, Docker and deployment.
How I work:
- We go over what your API needs to do.
- I define the endpoints and data model with you before coding.
- I build and test the API.
- I deliver working code you can run with one command.
I have 3+ years building backends for startups in Europe, the US and Latin America.
My goal is simple: an API that works today and is easy to extend tomorrow.
Send me a message and tell me what you're building.
Get to know Javier C
Javier C
Systems Engineer
- FromArgentina
- Member sinceFeb 2026
- Avg. response time1 hour
Languages
English, Spanish
Hi. My name is Javier. I'm a systems engineer and software analyst, focused on creating efficient and well-designed solutions. I have experience as a backend developer and frontedn developer.
Let’s connect.

