Browse categories
Explore
Fiverr Pro
English
$
USD
I will build a secure rest API with nodejs expressjs or nestjs
Opeyemi O
About this gig
Need a clean, fast, and secure REST API for your app or startup? I will build it with NodeJS, ExpressJS, or NestJS using TypeScript.
I am a full-stack developer with hands-on experience building production-ready APIs for SaaS apps, mobile backends, and business automation. I write clean, maintainable code with proper error handling, auth, and documentation.
WHAT I BUILD:
- REST APIs with CRUD operations and proper routing
- Authentication with JWT, OAuth2, or session-based login
- Role-based access control (RBAC)
- Third-party API integrations (Stripe, Paystack, Firebase, Supabase)
- Real-time features using WebSockets
- Database design with PostgreSQL, MongoDB, or MySQL
- API documentation with Swagger or Postman collection
WHAT YOU GET:
- Clean TypeScript source code
- Full API documentation
- Detailed code comments
- Instructions for deployment
- Post-delivery support if issues arise
Message me before ordering to confirm your scope and timeline. I will respond fast.
Get to know Opeyemi O
Opeyemi O
Fullstack Software Developer
- FromNigeria
- Member sinceSep 2024
- Avg. response time1 hour
- Last delivery9 months
Languages
English, Spanish
I am a full-stack TypeScript developer with a 4.8-star rating and proven results for clients in the US, Morocco, South Africa, and India. I build and fix web applications that work in production, not just locally. My core stack is NodeJS, NestJS, ExpressJS, NextJS, ReactJS, and TypeScript. I have built SaaS apps, REST APIs, mobile backends, and fixed critical bugs for startups and indie founders. I respond fast, communicate clearly, and never ghost mid-project. Message me and I will tell you exactly how I can help.
My Portfolio
Other Software Development Services I Offer
FAQ
How will you ensure my API can handle growth?
I design every API with scalability in mind—meaning it won’t crash when traffic spikes. By using Flask or FastAPI best practices, efficient database queries, and load testing, I guarantee your API stays responsive as your user base expands.
Do I need technical knowledge to work with you?
Not at all. I translate your business goals into technical requirements and handle all implementation. You simply share what you need (features, data flow, user access), and I’ll deliver a working API with clear documentation and easy-to-follow setup steps.
Which framework should I choose—Flask or FastAPI?
Both are excellent, but FastAPI is newer and faster for high-traffic applications. If you value speed and automatic input validation, FastAPI is ideal. Flask remains a solid choice for simpler projects. I’ll recommend whichever fits your budget and performance needs.
How long will the project take?
Typical delivery for a basic CRUD API is 3–5 days. For more complex requirements (authentication, multiple data models, deployment), I estimate 7–10 days. I’ll give you a precise timeline after reviewing your specifications and keep you updated at every step.
Will you handle authentication and security?
Yes. I integrate JWT or OAuth2-based authentication so only authorized users access your API. I also implement rate limiting, input validation, and secure database queries—protecting your data and giving you peace of mind.
What do you need from me to get started?
Just a brief description of your project: what data you want to store, who should access it, and any special features (e.g., user roles, payment integration). If you have branding guidelines or a tech preference, let me know. I handle the rest.
Can you deploy the API for me?
Absolutely. I provide Docker setup and deployment guidance for providers like AWS, DigitalOcean, or Heroku. If you prefer a managed service, I’ll deliver a ready-to-run package—no DevOps expertise required on your end.
