You will get a custom AI feature integrated into your web app
Project details
Need a Full Stack Developer & AI Engineer to integrate intelligent features into your web app? I integrate production-grade AI models (OpenAI GPT-4o, Anthropic Claude) into your existing React, Next.js, or NestJS codebase, giving your users smart features without a complete rebuild.
WHAT I INTEGRATE:
✅ Smart Text Tools: Summaries, email generation, text translation
✅ AI Search & RAG: Intelligent semantic search & recommendation systems
✅ Document Analysis: Parsing files, extracting structured JSON data
✅ OpenAI & Claude API: Streaming responses, token count optimization
✅ Backend Engineering: Rate-limiting, prompt engineering, caching
✅ Full Stack Coding: JavaScript, TypeScript, Node.js, NestJS, Python
I built Sneakertopia a live SaaS app where users describe custom products in plain text, and OpenAI generates designs in real-time. The backend handles API rate-limits, database caching, and streaming data.
You get clean, documented source code deployed to your Vercel or AWS servers.
Ready to add AI? Message me to discuss your codebase and get a technical roadmap!
WHAT I INTEGRATE:
✅ Smart Text Tools: Summaries, email generation, text translation
✅ AI Search & RAG: Intelligent semantic search & recommendation systems
✅ Document Analysis: Parsing files, extracting structured JSON data
✅ OpenAI & Claude API: Streaming responses, token count optimization
✅ Backend Engineering: Rate-limiting, prompt engineering, caching
✅ Full Stack Coding: JavaScript, TypeScript, Node.js, NestJS, Python
I built Sneakertopia a live SaaS app where users describe custom products in plain text, and OpenAI generates designs in real-time. The backend handles API rate-limits, database caching, and streaming data.
You get clean, documented source code deployed to your Vercel or AWS servers.
Ready to add AI? Message me to discuss your codebase and get a technical roadmap!
AI Algorithms
Large Language Model, Multimodal Large Language Model, Transformer ModelAI Applications
AI Content Creation, AI-Generated Code, Conversational AI, Machine Translation, Natural Language Generation, Natural Language Understanding, Sentiment Analysis, Synthetic Data GenerationAI Development Language
PythonAI Tools
Azure OpenAI, GitHub Copilot, Hugging FaceAI Models
ChatGPT, DALL-E, GPT-3, GPT-4, GPT-J, GPT-Neo, LLaMA, OpenAI Codex, WhisperWhat's included
| Service Tiers |
Starter
$900
|
Standard
$2,000
|
Advanced
$3,500
|
|---|---|---|---|
| Delivery Time | 5 days | 10 days | 15 days |
Number of Revisions | 1 | 3 | 5 |
AI Model Integration | |||
Batch Normalization | - | - | - |
Database Integration | - | ||
Detailed Code Comments | |||
Image Upscaling | - | - | - |
MLOps | - | - | |
Model Deployment | - | ||
Model Documentation | |||
Model Monitoring | - | - | |
Model Testing & Optimization | |||
Model Tuning | - | ||
Natural Language Processing | |||
NLP Tokenization | - | - | - |
Pre-Training | - | - | - |
Prompt Engineering | - | ||
Setup File | |||
Source Code |
Frequently asked questions
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FA
Fahd A.
Apr 12, 2024
Build a Grammarly-style Word add-in but for a different domain (backend is provided)
MS
Mona S.
Jul 4, 2021
Need backend developer to fix issues on my website build in WordPress(wocommerce)
Hassan did a really good job. he has very good knowledge of back-end development, WordPress back-end, etc., and is highly responsive to messages. I Highly recommended Hassan...
About Hassan
Full Stack Dev & AI Engineer | Agentic AI | React | Next.js | NestJs
Lahore, Pakistan - 6:30 am local time
🧠 WHAT I SPECIALIZE IN:
⚡ AI Integration & LLM Ops — Connecting OpenAI, Claude, or any LLM into existing applications with robust error handling, streaming, rate limiting, prompt optimization, and fallback APIs.
🤖 Agentic AI Systems — Designing and building autonomous AI agents that perform multi-step workflows, execute tool calls, and integrate seamlessly with your database or third-party business systems.
💻 AI-Powered SaaS Products — Full-stack MVP development using Next.js + NestJS + TypeScript, taking your AI product from concept to a deployed, production-ready system.
🛠️ AI-Assisted Development (Vibe Coding) — Utilizing Cursor, Claude Code, and shell-based agents to build, test, and ship clean, maintaining double the speed of traditional development workflows.
⚙️ Core Full-Stack Web Apps — Developing scalable REST/GraphQL APIs, relational and non-relational database schemas, secure authentication, and pixel-perfect UIs with or without AI components.
💼 WHAT I'VE SHIPPED (REAL PRODUCTION SYSTEMS):
👉 AI Design Platform (Sneakertopia) — An end-to-end product where users describe customized physical product designs in plain text, and OpenAI generates high-quality designs in real-time. Built Next.js UI, NestJS backend, MongoDB database, JWT auth, and a credit-billing system.
👉 Multi-Module E-Commerce System (EyewearStream) — A global retail platform supporting 50+ lens variants, dynamic addon pricing, insurance calculations, and tax API rules. Designed a clean, modular NestJS backend with independently scalable services.
👉 SaaS CRM with 3rd-Party Integrations (EasyCRM) — Integrated Zendesk support tickets, PayPal billing, and HubSpot CRM sync into a single cohesive pipeline, eliminating manual support workflows.
👉 Classified Marketplace (Enimels) — A full-stack listing marketplace featuring advanced search, filters, secure JWT authentication, and listing moderation.
💎 WHY CLIENTS CHOOSE ME OVER OTHER DEVELOPERS:
1️⃣ Full-Stack Ownership — You don't need to coordinate between frontend, backend, and AI developers. I handle the entire pipeline from database schemas and API design to frontend UI and Vercel/AWS deployment. Zero hand-off friction.
2️⃣ Production-First Mindset — I write clean, validated TypeScript. Every endpoint is rate-limited, secured, and logged. If it doesn't work under load, it doesn't ship.
3️⃣ Next-Gen Velocity — Using AI-assisted development tools (Cursor + Claude Code) lets me build, refactor, and bug-fix at double the speed of traditional development without sacrificing code quality.
4️⃣ Clear, Active Communication — Daily async updates, transparent progress, and responsive timezone overlap (UTC+5). You'll always know exactly what was done and what's next.
🛠️ TECHNICAL TOOLKIT:
• Frontend: Next.js · React · TypeScript · TailwindCSS · Shadcn UI · Ant Design
• Backend: NestJS · Node.js · Express · REST APIs · GraphQL · JWT · OAuth
• Databases: MongoDB · PostgreSQL · MySQL · Supabase · Prisma · Mongoose · Elasticsearch
• AI & LLMs: OpenAI API · Claude API · LangChain · AI Agents · Prompt Engineering
• Integrations: Stripe · PayPal · Zendesk · HubSpot · AWS · Vercel
• Tools: Git · GitHub · Cursor · Claude Code · Postman · Jira · Docker
📩 Ready to discuss your project? Message me with your requirements, and I’ll get back to you with an honest assessment, timeline, and technical approach. No boilerplate templates just a direct, technical conversation.
Steps for completing your project
After purchasing the project, send requirements so Hassan can start the project.
Delivery time starts when Hassan receives requirements from you.
Hassan works on your project following the steps below.
Revisions may occur after the delivery date.
Codebase Review & API Scoping
I analyze your existing repository, inspect your backend architecture, and scope out the AI integration connections.
AI Integration & Prompt Engineering
I write the connection code, program optimized prompts for token efficiency, and build streaming response handlers.