You will get an AI-powered full-stack SaaS app with LangChain, Next.js, and FastAPI
Project details
I build production-ready AI-powered SaaS applications using Next.js,
FastAPI, and LangChain — delivering clean architecture, real-time APIs,
and intelligent automation that scales.
Services include:
→ LLM integration (GPT-4, Claude, RAG pipelines, multi-agent systems)
→ Full-stack development (Next.js 15, NestJS, FastAPI, WebSockets)
→ SaaS architecture (multi-tenancy, Supabase RLS, JWT auth, RBAC)
→ AI agents & automation (voice agents, WhatsApp bots, Whisper STT)
→ CI/CD & deployment (Docker, GitHub Actions, Vercel, AWS)
Past work includes a solo-built multi-tenant pharmacy ERP with voice
prescription entry via Whisper + GPT-4 (shipped in 40 days), a
real-time messaging platform with a native Tauri desktop app, and a
live WhatsApp AI ordering agent powering a restaurant client.
I communicate clearly, flag issues early, and deliver code that's
ready for real users — not just demos. Message me with your idea and
I'll tell you exactly what's possible.
FastAPI, and LangChain — delivering clean architecture, real-time APIs,
and intelligent automation that scales.
Services include:
→ LLM integration (GPT-4, Claude, RAG pipelines, multi-agent systems)
→ Full-stack development (Next.js 15, NestJS, FastAPI, WebSockets)
→ SaaS architecture (multi-tenancy, Supabase RLS, JWT auth, RBAC)
→ AI agents & automation (voice agents, WhatsApp bots, Whisper STT)
→ CI/CD & deployment (Docker, GitHub Actions, Vercel, AWS)
Past work includes a solo-built multi-tenant pharmacy ERP with voice
prescription entry via Whisper + GPT-4 (shipped in 40 days), a
real-time messaging platform with a native Tauri desktop app, and a
live WhatsApp AI ordering agent powering a restaurant client.
I communicate clearly, flag issues early, and deliver code that's
ready for real users — not just demos. Message me with your idea and
I'll tell you exactly what's possible.
Programming Languages
JavaScript, Python, TypeScriptWhat's included
| Service Tiers |
Starter
$199
|
Standard
$1,099
|
Advanced
$2,499
|
|---|---|---|---|
| Delivery Time | 7 days | 14 days | 21 days |
Number of Revisions | 2 | 3 | Unlimited |
Number of Pages | 1 | 3 | 5 |
Design Customization | - | ||
Content Upload | - | ||
Responsive Design | |||
Source Code |
Optional add-ons
You can add these on the next page.
Additional Revision
+$30
Design Customization
(+ 2 Days)
+$150
Content Upload
(+ 1 Day)
+$80
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EC
Echo C.
Feb 20, 2025
Tutoring Software Engineering Trail Lesson
About Humayun
SaaS Product Engineer | Build, Fix & Scale Production Web Apps
Rawalpindi, Pakistan - 3:15 pm local time
I’m a strong fit when you need someone to:
• Fix or complete an existing Next.js and Supabase application
• Design secure multi-tenant authentication, RLS, and role-based access
• Add RAG, chat, voice, document-processing, or automation features
• Build or repair FastAPI APIs and third-party integrations
• Stabilize deployments on Vercel, Docker, and cloud infrastructure
Selected work:
• 8StarOS: A multi-store retail and POS platform covering checkout, inventory, repair tickets, buyback, rent-to-own contracts, analytics, reporting, permissions, and real-time Supabase synchronization.
• Corvus: An open-source real-time communication platform built with Next.js, Hono, Supabase Realtime, LiveKit, and Tauri.
• Ruhab: A multi-tenant pharmacy ERP with more than 50 secured APIs, role-based access, refresh-token rotation, and voice prescription entry using speech recognition and an LLM.
You’ll get clear communication, early identification of risks and edge cases, maintainable code, and progress you can review throughout the project.
Send me your current stack, the problem you are facing, and the expected outcome. I’ll respond with a practical scope and implementation plan.
Steps for completing your project
After purchasing the project, send requirements so Humayun can start the project.
Delivery time starts when Humayun receives requirements from you.
Humayun works on your project following the steps below.
Revisions may occur after the delivery date.
Requirements Review
Analyze client brief, clarify scope, confirm tech stack and deliverables.
Step 2 — Architecture & Planning
Define system design, database schema, API structure, and AI pipeline flow.