I'm Hammad Hassan, a full-stack AI engineer focused on building agentic systems that reason, act, and scale in production. I design and operate backend architectures for autonomous Digital Human Agents across real-time chat, voice, video, and browser channels — orchestrating multi-agent workflows and real-time scheduling. My work spans blockchain-based carbon-credit platforms on Solana, cloud-native payments and integrations with Stripe, Twilio, WhatsApp, and OpenAI Agents SDK, plus end-to-end product delivery for startups across Dubai, Bali, and Miami. I led the architecture and designed the entire platform for Simming.ai — a production agentic AI system deploying branded AI teammates across web, voice, and SMS for real businesses. I also built ReplantWorld.io — a live NFT tree marketplace with a real-time AI carbon calculation engine. I don't disappear after delivery. I stay until the system works the way it should — and beyond. Available worldwide for freelance contracts, long-term collaborations, and product builds. Check out my links and socials below _Email not available. Sign in: https://www.twine.net/signup_ · github.com/hamadhk7 · linkedin.com/in/hammad-hassan-khan-…I'm Hammad Hassan, a full-stack AI engineer focused on building agentic systems that reason, act, and scale in production. I design and operate backend architectures for autonomous Digital Human Agents across real-time chat, voice, video, and browser channels — orchestrating multi-agent workflows and real-time scheduling. My work spans blockchain-based carbon-credit platforms on Solana, cloud-native payments and integrations with Stripe, Twilio, WhatsApp, and OpenAI Agents SDK, plus end-to-end product delivery for startups across Dubai, Bali, and Miami. I led the architecture and designed the entire platform for Simming.ai — a production agentic AI system deploying branded AI teammates across web, voice, and SMS for real businesses. I also built ReplantWorld.io — a live NFT tree marketplace with a real-time AI carbon calculation engine. I don't disappear after delivery. I stay until the system works the way it should — and beyond. Available worldwide for freelance contracts, long-term collaborations, and product builds. Check out my links and socials below _Email not available. Sign in: https://www.twine.net/signup_ · github.com/hamadhk7 · linkedin.com/in/hammad-hassan-khan-WWWW…