Cornelius Yoga

I’m an Informatics Engineering graduate who enjoys building dependable backend systems that turn business processes into clean, production-ready APIs. I focus on REST API design, SQL workflows, authentication/authorization, and reliability from the start.

In my internship at Alfamart Supply & Distribution, I developed Flask/PostgreSQL internal warehouse systems for stock opname, picking, and supplier-return workflows. I built REST APIs and SQL transaction logic, implemented PostgreSQL connection pooling and gateway synchronization, and handled PDA/mobile-oriented workflows, multilingual support, and dual authorization while supporting QA and live production delivery.

I also served as a Teaching Assistant, mentoring 100+ students per semester through core computer science courses, helping them through technical problem solving and lab module preparation. In addition, I led a 50-member committee for a national seminar and international coding competition, coordinating planning, execution, judges, sponsors, and follow-up.

My projects reflect the same mindset: CZmoneY is an offline-first finance PWA with transaction queueing, reconnect sync behavior, and AI-assisted insights via server-side Gemini integration with validation and caching. I’ve also built an Android fruit detection app using on-device TensorFlow Lite with MobileNetV2 and CameraX, and a Laravel/MySQL tourism information website that has been adopted by local stakeholders and operated in production.