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I will build rest apis with expressjs, nestjs, mongodb, postgresql
Mahabubur R.
About this gig
Need a secure, scalable REST API for your web app, mobile app, SaaS platform, admin dashboard, or MVP?
I will develop a clean Node.js backend using Express.js or NestJS and integrate MongoDB or PostgreSQL.
What I can build:
- Custom REST API endpoints and CRUD operations
- Database schema design and integration
- JWT authentication, password hashing, protected routes, and role-based access
- Validation, centralized error handling, pagination, filtering, sorting, and search
- Agreed third-party API integrations
- Swagger documentation or a Postman collection for testing
You will receive organized source code, helpful code comments, database configuration guidance, API documentation, and a README with setup steps.
Select the package that matches your endpoint count and required features. Each order includes one framework (Express.js or NestJS) and one database (MongoDB or PostgreSQL). New modules, extra endpoints, payment gateways, cloud deployment, frontend work, and work outside the selected package require a Gig Extra or custom offer.
Message me before ordering with your requirements, API flow, preferred framework/database, and any existing project files.
Get to know Mahabubur R.
Mahabubur R.
Full Stack Software Engineer, SaaS, Web Platform, MVP Architect
- FromBangladesh
- Member sinceJun 2026
- Avg. response time1 hour
Languages
English
I am a Full Stack Software Engineer with a scalable mindset — I do not just build features, I design systems that hold up as they grow. I work with React.js, Next.js, Node.js, NestJS, FastAPI, MongoDB, and PostgreSQL. My strength is thinking through architecture before writing code, breaking down complex problems with precision, and making decisions that serve the project long after launch. My competitive program background sharpened my critical thinking — I analyse requirements deeply, catch edge cases early, and build solutions that are clean, maintainable, and ready to scale from day one.
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Other Software Development Services I Offer
FAQ
What technologies do you use for API development?
I develop REST APIs using Node.js with Express.js or NestJS. For databases, I work with MongoDB or PostgreSQL.
Will I receive the complete source code?
Yes. You will receive clean, organized, and fully functional source code along with setup instructions and API documentation.
Can you work with my existing backend project?
Yes. Please message me first and share your existing code, requirements, API flow, and technology stack for review.
Does one order include both Express.js and NestJS?
No. Each order includes one framework only: Express.js or NestJS. Using both frameworks requires a custom offer.
Does one order include MongoDB and PostgreSQL together?
No. Each package includes one database only: MongoDB or PostgreSQL. Multiple database support requires a custom offer.
Do you provide JWT authentication and user roles?
Yes, depending on the selected package or Gig Extra. This can include registration, login, password hashing, protected routes, and Admin/User roles.
Will you create API documentation?
Yes. I can provide Swagger documentation or a Postman collection so you can test and understand all API endpoints.
Can you integrate Stripe, PayPal, Cloudinary, Twilio, or other APIs?
Yes. Third-party integrations are available as a Gig Extra or custom offer. You must provide valid accounts, API keys, and required access.
Do you develop frontend websites or mobile applications?
This Gig is focused on backend API development only. Frontend, UI design, and mobile app development are not included unless agreed in a custom offer.
What is considered a revision?
A revision covers corrections or small adjustments within the agreed scope. New endpoints, modules, integrations, or major feature changes require an extra or custom offer.
