I help startups build LLM-powered apps, RAG pipelines, AI agents, and automation workflows. 10+ workflows delivered. 98% client satisfaction. Zero abandoned projects.
Fine-tuned LLaMA-2 7B on domain-specific mental health data, deployed on AWS SageMaker. Real-time crisis detection, conversation memory, and RAG-powered personalized responses validated with real university students.
3 LLMs orchestrated in real time. Two agents debate while a third judges — SSE streaming, neural TTS, and structured Pydantic outputs via LangChain.
AI-powered legal sales chatbot via n8n + WhatsApp Business API. Claude-powered client qualification, CRM sync, and voice note processing — zero manual steps.
End-to-end automation across Workable, Trakstar, JobVite, and Recooty. Scrapy scrapers, Selenium form-filling, n8n orchestration, Google Sheets tracking, and anti-detection measures.
Browser-based tool that filters low-quality job listings and highlights high-value opportunities on Upwork. Saves freelancers time and improves job search efficiency with smart filtering and usability features.
Flutter app for booking at-home physiotherapy services. Stripe payments, time-slot booking system, urgent same-day requests, email notifications, and a full therapist admin dashboard. Live on App Store & Play Store.
Offline-first POS for Windows restaurants. Hive local DB, 2-sec order processing, thermal printer integration, and role-based access. 50% faster than the previous system. Saving $200/mo in paper costs.
I build production-ready AI systems that work in the real world — not just demos.
With a CS degree from University of Gujrat and hands-on experience across LLMs, RAG pipelines, multi-agent systems, and automation workflows, I've helped startups go from idea to deployed product.
My work spans AI engineering at Vanguard Learning Lab (Singapore), delivering Flutter apps with 4.5+ star ratings on App Store and Play Store, and freelancing on Upwork with a perfect 5-star record.
Freelance (Upwork) Jan 2026 — Present
Designing and shipping AI automation workflows, LLM integrations, and backend systems for startups — n8n pipelines, WhatsApp/CRM chatbots, RAG, and custom Python services. 5-star client record.
Vanguard Learning Lab Pte Ltd Dec 2024 — Nov 2025
Built 3+ production AI apps — LLM integrations, FastAPI backends, RAG pipelines, vector databases, and Docker deployments.
"Excellent work and smooth communication throughout the project. The task was completed efficiently and met all expectations. Highly recommended."
"Hizar was fantastic to work with! I needed to fix the bug urgently and he diagnosed and fixed it quickly. He communicated clearly, explained the cause of the problem. Professional, responsive, and highly skilled. I'd definitely work with him again."
"I highly recommend Hizar! He stays action-focused, proactively spots challenges, and offers practical solutions to keep work moving forward."
"Hizar Sajjad delivered a flawless mobile app, showcasing impeccable PROFESSIONALISM and eye for details. Working with him was a breeze, thanks to his proactive communication and QUICK responses. Highly RECOMMEND!"