• Design a backend system in a cloud environment• Develop a data collector to transfer data from hardware device to the server

• Developed, built, and released a cosmetics B2B logistics platform based on Android and IOS app.• Developed real-time chat service, file upload and download service, and payment service.• Improved web view load times using CDN and setting cache policy of static contents.• Modeled OpenAI for a chatbot and developed chatbot service

• Established Data-Broker instance; It collects IoT data through Kafka Consumer, transforms the data to NGSI-LD, loads transformed data, and provides the data as time-series to Unity and admin dashboard.• Designed data structures in standard formats; designed NGSI-LD structure capable of connecting data in various formats such as XML and JSON.• By storing model data for IoT data validation in Redis, reduced validation time by retrieving data without connecting to the database.

• Worked on Naver ticket reservation website.

• Labeled AI voice data and built the dataset.