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I will build a secure backend API with nodejs and postgresql
JefersonG
About this gig
Need a reliable backend for your app or business? I will build a clean, secure and documented REST API with Node.js, TypeScript, Express and PostgreSQL.
What you get:
- Endpoints designed for your use case (CRUD, filters, pagination)
- PostgreSQL database with Prisma
- JWT authentication and role-based access (Standard and Premium)
- Input validation and clear error messages
- Swagger/OpenAPI documentation
- Automated tests, Docker setup and deployment help (Premium)
You can see how I work in my inventory system (API + React frontend) on my GitHub.
How it works: send me your idea, I confirm scope and timeline, and I deliver the code in a GitHub repository with a README so you can run it easily.
Not sure what you need? Message me before ordering.
Get to know JefersonG
JefersonG
From idea to working API
- FromCosta Rica
- Member sinceOct 2026
- Avg. response time1 hour
Languages
Spanish, English
From idea to working API.
Hi! I'm Jeferson, a backend developer from Costa Rica. I build secure, documented REST APIs and web apps with Node.js, TypeScript, Express and PostgreSQL, and I also work with Go and React. I deploy with Docker, Linux and GitHub Actions, and I have built AI chatbots that answer questions from documents (RAG).
I'm new on Fiverr, so I put extra care into every order and keep you updated at every step. Tell me about your project and I'll reply with a clear plan, timeline and price.
FAQ
Do I get the source code?
Yes. All packages include the full source code, delivered in a GitHub repository with a README that explains how to run the project.
Which technologies do you use?
Node.js, TypeScript and Express for the API, and PostgreSQL for the database (with Prisma). If you need a different database or framework, message me first and I will tell you if I can help.
Can you connect the API to my existing frontend or app?
Yes. I design the endpoints so any frontend (React, mobile app, etc.) can use them, and I can share example requests so your team can integrate easily.
What do you need from me to start?
A short description of what your app should do, the data you want to store, and who will use it (for example admins and customers). If you have a design or a list of features, even better.
Do you offer changes after delivery?
Each package includes revisions for changes within the agreed scope. Anything new beyond the scope can be quoted as a separate order or an extra.
Can you deploy it to my server?
Deployment help is included in the Premium package. Contact me before ordering so I can confirm your server setup.
What if I am not sure which package I need?
Send me a message before ordering. Tell me about your project and I will recommend the right package and give you an honest estimate.
