- Serving creatives for DPA(Dynamic Product Ads), ensuring effective delivery and optimization of ad materials

Generative AI-based Work Productivity Tool- Implemented a file service establishing a workflow to extract data from confidential files uploaded by users, utilizing Redis, MongoDB, and FastAPI. This involves storing the extracted data in a personalized vector store, efficiently making it available for LLM models. - Diagnosed a critical bottleneck in file service processing, then proposed and implemented a transition from synchronous to asynchronous internal OCR API requests. This… Show more Generative AI-based Work Productivity Tool- Implemented a file service establishing a workflow to extract data from confidential files uploaded by users, utilizing Redis, MongoDB, and FastAPI. This involves storing the extracted data in a personalized vector store, efficiently making it available for LLM models. - Diagnosed a critical bottleneck in file service processing, then proposed and implemented a transition from synchronous to asynchronous internal OCR API requests. This significantly reduced text extraction times by up to 88% and increased file processing API call efficiency by more than 50%- Identified significant memory overuse during image conversion; and implemented two solutions: switching to a disk-based compressed image file format and optimizing memory by releasing image objects post-conversion, collectively achieving a 90% reduction in memory usageServer Metrics Collector- Developed a real-time metric collector for over 120,000 VM servers at Korea’s largest cloud service provider, utilizing Spring Boot, Spring Batch, Zookeeper, and Kafka. The collector was integrated into enterprise-wide server monitoring, enhancing system performance monitoring and improving fault response efficiency.Cloud-based IoT PaaS- Developed cloud server backend systems to act as gateways for IoT data using RabbitMQ, MQTT, SpringBoot, JPA, MySQL, and MongoDB. The system ensures only certificate-authenticated IoT devices can connect to the cloud, with all data transmissions encrypted via TLS, guaranteeing data securityIoT Device Edge PaaS- Identified essential IoT features for extending cloud capabilities to edge devices and led the development of a local gateway feature, ensuring secure and efficient communication among edge devices and enabling data transmission to the cloud when necessary Show less