Quoc Cuong Nguyen

I've built FlowMaster at TechBuilder, a multi-tenant construction management SaaS platform serving 2,000+ users across multiple organizations. As Founding Engineer and Tech Lead, I lead five engineers while setting system architecture, coding standards, and CI/CD practices.

I design scalable backend systems with Python, Django, FastAPI, PostgreSQL, Celery, Redis, WebSockets, and cloud infrastructure. My work includes tenant-isolated architectures, real-time collaboration, asynchronous processing, and 10+ modules spanning BIM, project tracking, procurement, digital signatures, E-Office, and HRM.

At Finance Automation LLC, I migrated a Google Apps Script monolith into a three-tier Node.js architecture on Google Cloud Run for real-time financial reporting. At BreadStack, I reduced notification latency by 40%, improved MongoDB retrieval time by 30%, and helped achieve 99.9% uptime through Kubernetes, ArgoCD, and zero-downtime deployments.

I'm also building production RAG and agentic AI systems using LangGraph, Qdrant, OpenAI, MCP, hybrid retrieval, evaluation frameworks, and observability tooling. I focus on keeping business rules deterministic, AI workflows measurable, and cloud platforms reliable.