You will get Custom AI web app with Next.js, OpenAI, or Claude API
Project details
I build custom AI web apps that solve a specific problem for your business or users. Whether it is an internal tool, a customer-facing app, or a smart dashboard, I turn your idea into a working application you can use right away.
Each app is built on Next.js and React, with a backend and database that fit the project, plus AI features powered by OpenAI or Claude. The result is fast, responsive, and built to handle real use, not just a demo.
What you get:
A custom web app with a clean, responsive interface
AI features built around your use case: chat, search, generation, or analysis
Backend, database, and API setup (Supabase, PostgreSQL, or your choice)
User accounts and authentication if your app needs them
Deployment to your hosting, ready to use
Documented source code that you own
I work in weekly milestones, so you can review progress and give feedback as the app takes shape. You get a working product, the full code, and clear documentation at handover.
Send a short description of what you want the app to do and I will plan the scope and stack.
Each app is built on Next.js and React, with a backend and database that fit the project, plus AI features powered by OpenAI or Claude. The result is fast, responsive, and built to handle real use, not just a demo.
What you get:
A custom web app with a clean, responsive interface
AI features built around your use case: chat, search, generation, or analysis
Backend, database, and API setup (Supabase, PostgreSQL, or your choice)
User accounts and authentication if your app needs them
Deployment to your hosting, ready to use
Documented source code that you own
I work in weekly milestones, so you can review progress and give feedback as the app takes shape. You get a working product, the full code, and clear documentation at handover.
Send a short description of what you want the app to do and I will plan the scope and stack.
Programming Languages
JavaScript, Python, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$800
|
Standard
$2,500
|
Advanced
$5,000
|
|---|---|---|---|
| Delivery Time | 10 days | 20 days | 30 days |
Number of Revisions | 1 | 3 | 5 |
Design Customization | |||
Content Upload | - | - | |
Responsive Design | |||
Source Code | - |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$80 - $200Frequently asked questions
15 reviews
(15)
(0)
(0)
(0)
(0)
This project doesn't have any reviews.
Aa
Adel a.
Oct 9, 2020
Angular
Saif is a very hardworking developer and cooperative. He works tirelessly.
IC
Ilinca C.
Jul 25, 2020
Full time Angular 8 Delovper
HC
Hywel C.
Jun 2, 2020
Search and 2 tab application
Great person to work with. I would definitely rehire him again. understands the requirements clearly and delivered the quality product on time.
HC
Hywel C.
May 26, 2020
Create Reusable angular library for the search component
Done the job as required which was is given by the design and done the work to complete satisfaction
JA
Jawairia A.
Mar 25, 2020
Contact me today.
Saifullah has good knowledge and skills. I will likely have additional job for him in the future.
About Saifullah
AI Full Stack Developer | AI Agents, AI SaaS, RAG, n8n, Claude, MCP
Woodbridge, United States - 4:46 pm local time
Hi, I'm Saif — a full-stack AI developer who builds production-ready AI applications, SaaS products & integrations for founders, agencies & growing businesses.
Over the past 4 years, I've delivered 50+ AI products & full-stack systems for clients across healthcare, SaaS, e-commerce, real estate & agency operations. I work across the entire stack: backend APIs, frontend interfaces, database design, AI workflow integration, and deployment.
My background combines strong software engineering fundamentals with deep, hands-on AI expertise — which is why clients keep coming back when they need to scale or expand their systems.
My focus is on building things that ship and hold up under real users — AI-powered SaaS platforms, intelligent web & mobile applications, RAG-based knowledge systems, AI agents, voice bots & automation workflows that quietly do the work of a small team.
⭐ What I Can Help You Build:
✔️ AI-powered SaaS products — MVP development, full-stack architecture, multi-tenant systems, admin dashboards
✔️ Custom AI agents & multi-agent systems - LangChain, LangGraph, CrewAI, AutoGen
✔️ RAG pipelines & AI knowledge bases with vector databases like Pinecone, Weaviate, Chroma, Qdrant & pgvector
✔️ Full-stack web applications with AI features built in from the architecture up
✔️ Mobile applications with AI capabilities using React Native & Expo
✔️ E-commerce platforms with AI-powered search, recommendations & customer support
✔️ Voice AI agents built on Vapi, Retell AI, ElevenLabs, Twilio & Deepgram
✔️ Workflow automation with n8n, Make , Zapier & custom Python services
✔️ MCP (Model Context Protocol) servers & integrations — connecting Claude & other LLMs to your tools & data
✔️ OpenAI, Anthropic Claude & Gemini API integrations into existing applications
✔️ Custom REST and GraphQL APIs, plus third-party integrations (CRM, CMS, payment gateways, communication tools)
✔️ AI-powered chatbots, customer support systems, and internal copilots
⭐ Tech Stack I Work With:
✔️ Languages & Frameworks: Python, JavaScript, TypeScript, FastAPI, Node.js, Express, NestJS, Next js, React, React Native, Expo
✔️ AI & LLM Tools: LangChain, LangGraph, LlamaIndex, CrewAI, AutoGen, OpenAI API, Anthropic Claude API, Google Gemini, Hugging Face, DSPy
✔️ Vector & Search: Pinecone, Weaviate, Chroma, Qdrant, pgvector, Elasticsearch
✔️ Databases: PostgreSQL, Supabase, MongoDB, Redis, MySQL, Prisma, Drizzle
✔️ Voice & Telephony: Vapi, Retell AI, ElevenLabs, Twilio, Deepgram, Whisper
✔️ Automation: n8n, Make, Zapier, Pipedream, custom Python workers
✔️ Cloud & DevOps: AWS, Vercel, Railway, Render, Docker, GitHub Actions, Cloudflare
✔️ Payments & Auth: Stripe, Paddle, Clerk, Auth0, NextAuth, Supabase Auth
✔️ AI Dev Tools: Claude Code, Cursor, GitHub Copilot, v0, Replit Agent
⭐ Industries I've Worked With:
Healthcare & medical practices, SaaS startups, digital agencies, e-commerce and D2C brands, real estate, fintech, legal services, education & training organizations & B2B service businesses.
⭐ Why Clients Choose Me:
I take ownership of every project, which means I don't just write the code you ask for — I help you think through the architecture, flag potential issues early and make sure what we build can actually scale once real users show up.
I communicate clearly throughout the project with daily or weekly updates, Loom walkthroughs for milestones & direct answers when you have questions. I deliver on agreed timelines and provide proper documentation so your team can maintain and extend the system after we wrap.
I also work AI-native — Claude Code, Cursor, and modern AI dev tools are part of how I ship, which means I move 3–4x faster than traditional development cycles while maintaining production-grade quality. For teams adopting these tools themselves, I also offer Claude Code coaching & consulting.
⭐ How I Work:
We start with a quick discovery call to understand your goals, constraints, and timeline.
I propose a clear scope with weekly milestones and fixed deliverables — no vague open-ended work.
You get daily or weekly progress updates with demo links, Looms, and screenshots so you always know where things stand.
Every project ships with documentation, architecture notes, runbooks, and a support window after delivery.
⭐ Best Fit Clients:
Founders building their first AI product. Agencies that need reliable white-label AI delivery. Operators looking to automate manual workflows. SaaS teams adding AI features to existing products. Companies needing custom MCP integrations connecting LLMs to their internal tools.
Whether you're early-stage & exploring what's possible, or you have a clear scope and need someone to execute, I'd love to hear about what you're working on.
Steps for completing your project
After purchasing the project, send requirements so Saifullah can start the project.
Delivery time starts when Saifullah receives requirements from you.
Saifullah works on your project following the steps below.
Revisions may occur after the delivery date.
Discovery
we define features, scope, and stack.
Design
I set up the structure, UI, and database.