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Fiverr Pro
English
$
USD
I will build a scalable rest API with nodejs, expressjs or nestjs
Borys U.
About this gig
Need a REST API developer for your Node.js application?
I will develop, extend, or improve REST APIs using Node.js, Express.js, or NestJS. Whether you need new API features, additional endpoints, database operations, authentication, or backend improvements, I can help build reliable server-side functionality tailored to your application.
I can work with both new and existing projects, including:
REST API development and new endpoints
CRUD operations and business logic
PostgreSQL or MongoDB integration
JWT authentication and authorization
Request validation and error handling
Pagination, filtering, and sorting
Third-party API integrations
Existing API improvements and extensions
React and Next.js frontend integration
I focus on clean architecture, maintainable code, reliable API behavior, and secure backend development.
Have an existing Node.js API that needs new functionality or improvements? Send me your requirements and I'll help you move it forward.
Get to know Borys U.
Borys U.
Full Stack Developer, NodeJS Express NestJS React NextJS
- FromUkraine
- Member sinceAug 2026
- Avg. response time1 hour
Languages
English, Ukrainian
I’m a Full Stack Developer specializing in NodeJS, ExpressJS, NestJS, React, and NextJS. I build responsive web applications, scalable REST APIs, and backend services using TypeScript and JavaScript.
I can help with developing new features, fixing bugs, integrating APIs, authentication, database integration, and improving existing applications.
My experience includes MongoDB, PostgreSQL, JWT authentication, Google OAuth, Socket.IO, Redux Toolkit, and modern frontend and backend development.
I focus on clean, maintainable code and reliable solutions tailored to your project.
My Portfolio
Other Software Development Services I Offer
FAQ
Can you work on an existing REST API?
Yes. I can add new endpoints, features, authentication, database operations, integrations, and other backend functionality to an existing Node.js API.
Can you build APIs with Express.js or NestJS?
Yes. I work with both Express.js and NestJS and can use the framework that best fits your application's requirements.
Can you integrate my API with PostgreSQL or MongoDB?
Yes. I can connect your API to PostgreSQL or MongoDB and implement the required data operations, validation, and business logic.
Can you add authentication and authorization?
Yes. I can implement JWT authentication, protected routes, user roles, permissions, and authorization based on your requirements.
Can you integrate third-party APIs?
Yes. I can integrate external REST APIs and services, including authentication, requests, response handling, error handling, and custom integration logic.
