austine sixtus

I’m a highly motivated mid-level fullstack developer focused on building robust, scalable applications. I specialize in modern web and desktop technologies, delivering responsive user experiences with clean, production-ready architecture.

In my work, I build and deploy production FastAPI services capable of handling 10k+ req/day using async SQLAlchemy + PostgreSQL. I containerize full-stack deployments with Docker Compose and ship with zero-downtime deployments, integrating third-party APIs like Google OAuth, GitHub OAuth, Google Maps API, and WhatsApp Business API.

I also develop cross-platform pyQT6 desktop applications for Windows, macOS, and Linux, with custom DPI scaling and native look-and-feel fixes. Alongside that, I create secure backend systems with JWT-based authentication and complete CRUD functionality to support real user workflows.

From automated WhatsApp delivery flows to an AI-powered WhatsApp and web assistant using local LLMs (Llama 3/mistral), I enjoy turning complex problems into reliable software. My goal is always the same: build efficient systems that are easy to use, easy to maintain, and ready to scale.