Hammad K.

🚀 Full-Stack AI Augmented Web Engineer | 6+ years | LangChain • Voice AI • OpenAI • Nest.js • AWS Hi, I'm Hammad. I build production-grade AI SaaS platforms, RAG-powered chatbots, and Voice AI agents that don't break the moment a real user touches them. If you've worked with devs who ship 70% of an AI build and vanish or who deliver demos that hallucinate, leak data, or fall apart under real traffic. That's not how I work. I architect systems to scale from day one and stay accountable until they're live. ───────────────────────────────────── RECENT AI & SAAS BUILDS ───────────────────────────────────── → RAG chatbot for B2B SaaS (LangChain + Pinecone + GPT-4): trained on client's docs + CRM, 92% support deflection, GDPR-compliant → Voice AI agent for inbound healthcare intake (Vapi + ElevenLabs + Whisper + Twilio): sub-700ms latency, CRM-integrated, handles 800+ calls/day → Multi-tenant AI SaaS dashboard (Next.js + FastAPI + Postgres + AWS): white-label, Stripe billing, RBAC, Figma to production in 7 weeks → Document intelligence pipeline (LangChain + LlamaIndex + pgvector): 50K+ docs ingested, semantic search with citations on every answer → Outbound Voice AI for lead qualification (Retell + GoHighLevel): 3x qualified-lead rate, fully automated SMS/email/voice workflows ───────────────────────────────────── WHAT I BUILD ───────────────────────────────────── ✅ Custom AI Chatbots: RAG-powered, trained on YOUR data (websites, docs, CRMs, knowledge bases). LangChain, LlamaIndex, vector DBs (Pinecone, Weaviate, Qdrant, pgvector) ✅ Voice AI Agents: Vapi, Retell, ElevenLabs, Whisper, Twilio. Inbound + outbound, CRM-integrated, sub-second response times ✅ AI SaaS MVPs: Figma to production in 6–10 weeks. Multi-tenant, auth, Stripe billing, dashboards, the works ✅ LLM Integrations: OpenAI (GPT-4o, o1), Claude, open-source models (Llama, Mistral). Prompt engineering, fine-tuning, evals ✅ Backend Architecture: FastAPI, Node.js, Django. Built to scale from 100 to 100K users without a rewrite ✅ AI Automation: n8n, Make, Zapier + custom GPT agents wired into HubSpot, GoHighLevel, Salesforce ───────────────────────────────────── TECH STACK ───────────────────────────────────── 🤖 AI/LLM: OpenAI (GPT-4o, o1), Anthropic Claude, LangChain, LangGraph, LlamaIndex, Hugging Face, Whisper, ElevenLabs, Vapi, Retell, RAG, fine-tuning, embeddings, prompt engineering 🗄️ Vector DBs: Pinecone, Weaviate, Qdrant, pgvector, Chroma ⚙️ Backend: Python (FastAPI, Django, Flask), Node.js, Express, NestJS, WebSockets, REST, GraphQL 🎨 Frontend: Next.js, React, TypeScript, Tailwind, Redux, React Query, Vue 🗃️ Databases: PostgreSQL, MongoDB, Redis, Supabase, Firebase, MySQL ☁️ Cloud & DevOps: AWS (EC2, Lambda, S3, RDS, ECS, Bedrock), GCP, Docker, GitHub Actions, Vercel, Nginx 🔌 Integrations: Stripe, Twilio, Auth0, OAuth/SSO, GoHighLevel, HubSpot, Salesforce, WhatsApp Business API, n8n, Make ───────────────────────────────────── HOW I WORK ───────────────────────────────────── → Free 30-min scoping call before I quote → Fixed-milestone proposals — no surprise invoices → 1-week sprints with a working demo every Friday → Daily updates in your channel (Slack, Loom, email) → 30-day bug-fix window included on every project → I ship ~30% faster using Claude Code + MCP-driven workflows . Without cutting corners on security or code quality ───────────────────────────────────── WHAT CLIENTS SAY ───────────────────────────────────── ⭐⭐⭐⭐⭐ "Hammad is a strong developer with good ethics and integrity. On time, responsible — the future of Pakistan's software developers." ⭐⭐⭐⭐⭐ "Delivered exactly what I needed — knowledgeable, communicative, and reliable." ───────────────────────────────────── NOT THE RIGHT FIT IF ───────────────────────────────────── ✗ You want the cheapest bid on the board ✗ You want a coder who silently follows the spec even when the spec is wrong ✗ You want "just wrap GPT-4 in a textbox". I build production AI, not toys If you want an engineer who pushes back when it matters and ships when it counts, let's talk. 📩 Hit "Invite to Job" and we'll scope it together.