Nasir H.

I am a senior full stack engineer with 7+ years of experience building production SaaS platforms across fintech, AI communications, legal tech, e-commerce, and CRM. Backend: Python (FastAPI, Django/DRF, Flask), Node.js (NestJS), PostgreSQL, MongoDB, Redis, Celery, TaskIQ, RabbitMQ. Frontend: React.js, Next.js, Vue.js. Infrastructure: AWS (EC2, EBS, S3, Cognito), Docker. AI and agent systems: LangGraph, RAG pipelines, pgvector, MCP servers, Gemini API, OpenAI API. Recent work: - AI agent backend systems using LangGraph and RAG for knowledge base search and automated workflows - Compliance and financial data platform with document processing and reconciliation logic (FastAPI, PostgreSQL, S3) - Omnichannel communication platform for bulk SMS, WhatsApp, and cloud calling, built to handle hundreds of thousands of messages (Django, FastAPI, Celery, Redis, RabbitMQ) - Two AI voice agent calling systems with custom knowledge bases and workflow engines (FastAPI, Twilio) - Multi-role legal SaaS with AI assisted chat between lawyers and clients (Django, React.js) - Rental platform with payment integration (FastAPI, MongoDB, AWS, PayPlus) Automation and workflow tooling: GoHighLevel (GHL), Make automation platform, and Twilio for voice/IVR/SMS. I have built automation platforms end to end, from GHL environment setup and webhook driven workflows to custom IVR call flows, connecting no-code tools to custom backend logic when the built-in tools hit their limits. I work best with clients who have clear requirements and want a developer who can own the backend end to end, from database design to deployment.