You will get a scalable backend API built with Node.js, NestJS & PostgreSQL
Top Rated
Project details
You’ll get a robust, high performance backend built with Node.js, NestJS, or Express designed for scalability, security, and reliability. I’ll architect APIs, microservices, and databases (PostgreSQL, MongoDB, Redis) that handle high traffic, real time operations, and complex business logic with ease. With 10+ years of experience powering SaaS, Fintech, Healthcare, and AI platforms, I deliver clean, maintainable code, fast response times, and secure integrations (REST, GraphQL, WebSockets, Stripe, AWS). My solutions are optimized for growth, reliability, and seamless user experiences, ensuring your product scales confidently from MVP to millions of users.
Programming Languages
JavaScript, Python, TypeScriptCoding Expertise
Localization, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$300
|
Standard
$1,000
|
Advanced
$2,000
|
|---|---|---|---|
| Delivery Time | 5 days | 10 days | 20 days |
Number of Revisions | 2 | 3 | 5 |
Number of Pages | 5 | 15 | 30 |
Design Customization | - | - | - |
Content Upload | |||
Responsive Design | |||
Source Code |
Frequently asked questions
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SH
Sajjad H.
Aug 13, 2026
Experienced Full Stack Developer to help move web app MVP to Live/Prod
Great dev to work with, took our app from just a basic code base to a fully grown multi-tenanted & subscription tier based app. Thank you for all the hardwork, really appreciate it Tayyab, will continue to work with you.
AB
Anthony B.
Mar 20, 2026
Update Write Checks function
Awesome developer!! He did a great job on all of our projects and he’s very knowledgeable. I recommend him to anyone looking for a strong developer
ZH
Zoltan H.
Jan 15, 2026
Senior Frontend Engineer (Next.js / Tailwind) — Paid Execution Test First
AP
Alvin P.
Oct 27, 2025
Expert Full stack Developer for CRM Development.
Excellent Job, backend coding, complex database and helped me with a 2nd project.
AS
Alexander S.
Aug 21, 2025
Contract Appraisal
Tayyab has been with us from the very start of building our company, and his impact has been outstanding. He’s an exceptional developer with a strong eye for clean, scalable code and a real talent for solving problems quickly. Beyond his technical skills, he’s reliable, proactive, and a true team player. We couldn’t have asked for a better partner in bringing our product to life, and I’d highly recommend him to anyone looking for top-tier frontend expertise.
About Tayyab
Senior Full Stack AI Engineer | AI Chatbots, RAG, Agents & SaaS
100%
Job Success
Lahore, Pakistan - 10:01 pm local time
With 10+ years of software engineering experience, I help startups, growing businesses, and enterprises build, integrate, and scale AI-powered products from MVPs and prototypes to reliable production systems.
My strength is combining AI engineering + full-stack development + backend architecture + API integrations + automation, so I can build not just the AI feature, but the complete product around it.
🤖 What I Build
🔹 AI Chatbots & Assistants
- AI customer support & sales chatbots
- Knowledge-base & website AI assistants
- Human handoff & fallback workflows
- Lead generation & qualification
🔹 RAG & Knowledge Base AI
- RAG / Retrieval Augmented Generation
- Vector & semantic search
- Document-based AI assistants
- pgvector, Pinecone, Weaviate
- Source-grounded AI responses
🔹 AI Agents & Automation
- AI agents & tool calling
- OpenAI / ChatGPT / Claude / Gemini integrations
- Business workflow automation
- REST APIs, webhooks & third-party integrations
- Human-in-the-loop & approval workflows
🔹 Full-Stack AI & SaaS
- Next.js, React & TypeScript
- Node.js, Python & FastAPI
- AI-powered SaaS applications
- PostgreSQL, MongoDB, Redis & Supabase
- AWS, Docker, CI/CD & cloud deployment
- Enterprise & Healthcare
I also bring experience in:
- HL7 v2, FHIR & Mirth Connect
- Enterprise API integrations
- Legacy application modernization
- Performance optimization & scalable architecture
- Secure business systems & integrations
🧩 How I Work
I don't add AI just because it's trendy.
🎯 I first understand your business workflow, users, data, integrations, and goals, then design the simplest reliable solution.
My focus is:
✅ Production-ready implementation
✅ Reliable AI behavior & fallback logic
✅ Secure integrations
✅ Scalable architecture
✅ Real-world testing & edge cases
✅ Clean, maintainable code
✅ Clear communication & reliable delivery
🏆 Why Clients Work With Me
⭐ 10+ years of professional software engineering experience
💰 $100K+ earned on Upwork
🏅 Top Rated Plus
💯 100% Job Success
📊 SaaS platforms serving thousands of users
⚡ API response times improved by up to 60%
🚀 Lighthouse scores above 90
🤖 Production AI, healthcare & enterprise integrations
If you need an AI chatbot, RAG system, AI agent, workflow automation, OpenAI integration, or AI-powered SaaS application, send me your use case and product context.
🚀 Let's turn your AI idea into a reliable production system.
Steps for completing your project
After purchasing the project, send requirements so Tayyab can start the project.
Delivery time starts when Tayyab receives requirements from you.
Tayyab works on your project following the steps below.
Revisions may occur after the delivery date.
Requirement Gathering & Architecture Planning
I’ll review your requirements, define the backend architecture, database schema, and finalize all API specifications before development begins.
API Development & Integration
I’ll build secure, scalable REST or GraphQL APIs using Node.js / NestJS with TypeScript, connect your database, and integrate required third-party services.