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You will get I will build a custom web application using React and Node.js

Kuldeep P.Status: Offline
Kuldeep P. Kuldeep P.
4.5
Top Rated
Preview imagePreview imagePreview image

Let a pro handle the details

Buy Web Application Programming services from Kuldeep, priced and ready to go.
Kuldeep P.Status: Offline
Kuldeep P. Kuldeep P.
4.5
Top Rated
Preview imagePreview imagePreview image

Let a pro handle the details

Buy Web Application Programming services from Kuldeep, priced and ready to go.

Project details

Looking to build a custom web application tailored to your business or startup? I’m here to help!

I specialize in creating scalable, fast, and user-friendly web apps using modern technologies like React.js, Node.js, and MongoDB. Whether you're building a dashboard, admin portal, booking system, or internal tool — I can turn your idea into a high-quality product.

💻 Tech Stack:

Frontend: React.js / Angular

Backend: Node.js (Express)

Database: MongoDB / Firebase

APIs: REST / 3rd-party integrations

✅ What You’ll Get:

Custom UI design (responsive for all devices)

Secure backend with authentication (if needed)

Clean code & fast performance

Easy-to-manage structure

Ongoing support (optional)

I’ll work closely with you to ensure your app does exactly what you need — on time and within budget.
Programming Languages
HTML & CSS, JavaScript, TypeScript
Coding Expertise
Cross Browser & Device Compatibility, Security, Design
What's included
Service Tiers Starter
$200
Standard
$500
Advanced
$1,000
Delivery Time 5 days 7 days 15 days
Number of Revisions
222
Number of Pages
4710
Design Customization
Content Upload
Responsive Design
Source Code
4.5
11 reviews
82% Complete
(9)
1% Complete
(0)
9% Complete
(1)
1% Complete
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9% Complete
(1)

RC

Ryan C.
5.00
Nov 27, 2025
Developer Needed to Build Custom Invoicing & Billing App Working with him was a smooth and hassle-free experience. He understood the requirements clearly, delivered quality work on time, and communicated professionally throughout the project. If you’re looking for someone reliable and skilled, he’s definitely a great choice.

RC

Ryan C.
5.00
Nov 4, 2025
Developer Needed to Build Custom Invoicing & Billing App Working with Kuldeep was a really good experience. He understood what I needed, kept in touch regularly, and completed the work on time. The quality was great, and everything went smoothly. I really appreciate his effort and would be happy to work with him again in the future.

PN

Prijwal N.
5.00
Sep 29, 2025
Port NodeJS Code and Integrate Apryse Drawing Tools

SY

Shivam Kumar Y.
5.00
Sep 6, 2025
Spike Alert System to Existing Social Media Analytics Tool My experience working with Kuldeep was excellent. He is highly professional, communicates clearly, and delivers quality work on time. I really appreciate his dedication and problem-solving approach. I would definitely love to work with Kuldeep again on future projects!

VA

Venkata A.
5.00
Aug 23, 2025
Python Developer for Summarization Application
Kuldeep P.Status: Offline

About Kuldeep

Kuldeep P.Status: Offline
AI & Automation Engineer | Multi-Tenant SaaS, RAG, Python & Node.js
100% Job Success
4.5  (11 reviews)
Khategaon, India - 12:14 pm local time
Top Rated | 100% Job Success | 14 of 14 projects delivered

I build AI automation and multi-tenant SaaS backends in Python and Node.js.

Recent work: A WhatsApp assistant answering tenant questions from a RAG knowledge base in ChromaDB, a Playwright system that monitors government development applications overnight and emails stakeholders before anyone opens a laptop, and a property platform that publishes its own listings to Facebook Marketplace.

WHAT I DO

AI and LLM integration
Claude API and OpenAI API integration, RAG pipelines with ChromaDB and vector search, LangChain, WhatsApp Business API assistants, n8n workflow automation.

Python automation and data acquisition
Playwright and Python scrapers running concurrently at scale, FastAPI services, scheduled AWS Lambda and EventBridge jobs, automated reporting and alerting through SendGrid.

Multi-tenant SaaS architecture
PostgreSQL tenant isolation, role-based access control across multiple user types, Stripe subscription billing, Azure AD and MSAL enterprise authentication.

Backend engineering and rescue work
Slow queries, broken integrations, architecture that stopped scaling. Python, FastAPI, Flask, Node.js, Java Spring Boot.

PROJECTS

Propfinda - Multi-tenant property management SaaS. PostgreSQL data isolation, RBAC for admins, owners and tenants, Stripe billing. Automated listing distribution to Facebook Marketplace via Meta API and n8n. WhatsApp onboarding assistant powered by a ChromaDB RAG knowledge base. Playwright pipelines pulling rental applications from external channels.

DA Scraper - Automated monitoring platform tracking infrastructure development applications across government networks. Concurrent Playwright and Python scrapers, FastAPI, PostgreSQL audit history, serverless alerting via AWS Lambda, EventBridge and SendGrid.

Projx-Matrix - Real estate feasibility and lot-pricing platform. Azure AD (MSAL) enterprise SSO, Flask microservices containerised on AWS ECS Fargate, DynamoDB, Next.js and Plotly analytics dashboards.

Cyberstash - Backend core for an Australian cyber defence platform. High-availability Java and Spring Boot APIs processing live threat detection arrays and infrastructure safety logs.

STACK

AI and automation: Claude API, OpenAI API, RAG, ChromaDB, LangChain, n8n, Playwright, WhatsApp Business API
Python: FastAPI, Flask, SQLAlchemy, Shapely, Pandas
JavaScript: Node.js, Express, NestJS, React, Next.js, TypeScript
Java: Spring Boot
Data: PostgreSQL, MongoDB, DynamoDB, ChromaDB, Supabase, Firebase
Cloud: AWS Lambda, ECS Fargate, EventBridge, S3, CloudFront, Docker, GitHub Actions, Azure AD

HOW I WORK

I reply within 0-4 hours and work 30+ hours a week. If I think your approach will cause problems later, I tell you before we start rather than after. If a project is not a fit for me, I say so instead of taking the contract.

Message me with what you are building and where you are stuck. I will
tell you how I would approach it before you spend anything.

Steps for completing your project

After purchasing the project, send requirements so Kuldeep can start the project.

Delivery time starts when Kuldeep receives requirements from you.

Kuldeep works on your project following the steps below.

Revisions may occur after the delivery date.

Requirement Gathering

Understand your business goal, features, and target users Finalize tech stack, page list, and user flow Receive any reference links or design inspirations

Review the work, release payment, and leave feedback to Kuldeep.