I will build scalable nodejs backend apis with nestjs or express


Top Rated
About this gig
Need a secure backend or API that can support a real web, mobile or SaaS product?
I bring 20+ years of professional experience across business and technology, with a Masters in Computer Science and MBA.
I develop production-focused backend systems and REST APIs using Node.js, NestJS and Express.
I start by understanding your business workflows, users, data and integrations before designing the backend architecture.
I can help with:
REST API and backend development
NestJS, Node.js and Express
PostgreSQL and MongoDB integration
Authentication, roles and permissions
Validation, error handling and logging
Third-party API, webhook and payment integration
SaaS and mobile-app backends
Existing backend enhancements and troubleshooting
Cloud deployment and production support
Where required, I can also integrate OpenAI/ChatGPT, Claude, Gemini and other AI APIs into backend workflows.
Please message me before ordering so I can review your requirements and confirm the correct package or custom offer.
Get to know Aamer R.
SaaS and AI Solutions Architect, Full Stack and Voice AI Developer
Top Rated
- FromPakistan
- Member sinceJun 2019
- Avg. response time1 hour
- Last delivery5 days
Languages
English, Urdu
My Portfolio
Other Software Development Services I Offer
FAQ
Should I contact you before ordering?
Yes. Backend projects vary significantly by data model, endpoints, authentication, integrations and existing architecture. Please message me first so I can review the scope and confirm the appropriate package or custom offer.
Do you work with NestJS as well as Express?
Yes. I work with Node.js using NestJS or Express depending on the application architecture, complexity and existing codebase.
Which databases can you integrate?
I commonly work with PostgreSQL and MongoDB and can integrate other supported databases depending on the project including Supabase, Firebase etc.
Can you build authentication and role-based access?
Yes. I can implement authentication, authorization, roles, permissions and protected API workflows according to your requirements.
Can you integrate third-party APIs and webhooks?
Yes. I can connect payment systems, communication services, CRMs, external APIs, webhooks and other business platforms.
Can you integrate AI APIs into my backend?
Yes. Where relevant, I can integrate services such as OpenAI/ChatGPT, Claude, Gemini and other AI APIs into backend workflows and applications.
Can you work on an existing Node.js/NestJS backend?
Yes. I can review an existing backend to add features, improve APIs, resolve issues, integrate services or continue development. Please contact me first so I can review the current codebase as we can setup a separate discovery gig according to project nature.
Are hosting and third-party usage charges included?
No. Hosting, database hosting, AI usage, payment-provider fees and other third-party service charges are paid separately as in this gig I only charge coding/development charges and 3rd party services are charged on usage basis.
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gladsworthy

Indonesia
Ongoing collaborationGreat uy to communicate with, ready for more!
$50
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Ongoing collaborationExperience meets speed. Fiverr's best kept secret.
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2 reviews for this Gig
| (2) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Recommend to a friend
- Service as described
Sort By
G 
gladsworthy

Indonesia
Ongoing collaborationGreat uy to communicate with, ready for more!
$50
Price
A 
Seller's Response
Helpful?S solver1

Qatar
Ongoing collaborationExperience meets speed. Fiverr's best kept secret.
$100-$200
Price
A 
Seller's Response
Helpful?

