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Fiverr Pro
English
$
USD
I will integrate api for payment gateway or stripe build proudction saas product
Rohit K
5.0
5.0
About this gig
Need a secure, scalable, and production-ready backend for your web, mobile, SaaS, or AI application?
I will build a high-performance Node.js / NestJS backend with clean architecture, secure APIs, database integration, and reliable deployment.
With 5+ years of professional development experience, I build production-ready backend systems for SaaS, AI, fintech, Web3, and modern web applications.
What I can build:
Node.js, NestJS & Express REST APIs
GraphQL & Apollo APIs
JWT, OAuth & Role-Based Access Control
PostgreSQL, MongoDB, MySQL & Supabase
Third-party APIs, webhooks & payment integrations
OpenAI, Claude & Gemini integrations
Real-time APIs & WebSockets
API validation, security & error handling
Database design & performance optimization
Docker & cloud deployment
Perfect for:
SaaS AI Apps AI Agents MVPs Fintech Web3 Web & Mobile Apps
Whether you need a new backend, API integration, existing backend fixes, or performance optimization, I'll build it with maintainability, security, and scalability in mind.
Send me your requirements before ordering. I'll review your project and recommend the right backend approach.
Get to know Rohit K
Rohit K
SaaS and Gen AI Developer Automation Nextjs Nodejs FastApi
- FromIndia
- Member sinceDec 2025
- Avg. response time1 hour
- Last delivery3 weeks
Languages
Hindi, English
I build production-ready SaaS platforms, AI systems, and web apps for founders and businesses. With 5+ years of full-stack engineering experience and 20+ delivered projects, I turn complex ideas into clean, scalable software. My track record includes multi-tenant SaaS platforms with automated billing, custom AI agents with RAG workflows, Web3 applications with secure payment integrations, and real-time analytics dashboards. Whether architecting from scratch or debugging complex code, I deliver clean architecture fast. Message me to discuss your project!
My Portfolio
FAQ
Do I need any technical knowledge to work with you?
No. I'll ask the right questions upfront to understand your business and goals, then handle all the technical work. You just need to know what you want your website or AI feature to accomplish.
Can you build a complete backend for my SaaS or web application?
Yes. I can build the backend from scratch, including API architecture, authentication, database integration, business logic, third-party APIs, and deployment. I can also work with an existing frontend such as React, Next.js, or a mobile application.
Can you fix or improve an existing Node.js backend?
Yes. I can debug existing Node.js, Express, or NestJS applications, fix API and database issues, improve performance, strengthen security, and refactor code where needed without rebuilding the entire system.
How long does a typical project take?
Basic websites are delivered in 1 days, Standard in 5 days, and Premium in 10 days.
Can you deploy and make my backend production-ready?
Yes. I can configure your backend for production, including environment variables, database configuration, Docker, API security, logging, and deployment on platforms such as AWS, Render, or other suitable cloud providers.
Reviews
1 reviews for this Gig
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hillstomountain
India
My experience of working with Rohit was impressive and he worked upon a sophisticated AI agent for my SPA which is extraordinarily capable of fulfilling the user queries in seconds using a fully functional LangGraph workflow in combination with advanced AI technologies such as Gemini, OpenAI, and Grok....
$50
Price
2 days
Duration
R 
Seller's Response
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Reviews
1 reviews for this Gig
| (1) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
H hillstomountain
India
My experience of working with Rohit was impressive and he worked upon a sophisticated AI agent for my SPA which is extraordinarily capable of fulfilling the user queries in seconds using a fully functional LangGraph workflow in combination with advanced AI technologies such as Gemini, OpenAI, and Grok....
$50
Price
2 days
Duration
R Seller's Response
Helpful?
