[AI Data Engineer]+ Development and operation of ETL pipelines for advertising data+ Development and operation of big data platform for advertising data collection and analysis+ Improvement of Naver performance-based display advertising log schema and collection pipeline+ Performance improvement of real-time data processing pipeline with Iceberg+ Development and operation of Line Yahoo RSA(Responsive Search Ad) pipeline+ Development and operation of Naver powerlink RSA(Responsive Search Ad) pipeline+ Design and development of MLOps pipeline architectures, including proposing solutions and managing the entire process from architecture design to implementation

[Data Engineer]+ Development and operation of an ETL pipeline for shopping data+ Development and operation of big data platform for shopping data collection and analysis+ Development of an admin tool for version control and API to provide queries and information+ Migration of the architecture and performance enhancement of a revenue aggregation pipeline from spring batch to spark+ Migration of the architecture and performance enhancement of a settlement pipeline from spring batch to spark, performed in a network separation environment+ Proof of Concept (POC) and operational implementation of a data discovery platform (Datahub), including system development and modifications to open source components

[Data Engineer]+ Development and operation of a vehicle sensor and GPS data collection system+ Development and advanced enhancement of GPS trajectory data and map matching technology for accuracy improvement- (patent) Map matching method using reverse tracking map matching (https://doi.org/10.8080/1020170128466)+ Development of a real-time road change detection system using vehicle trajectory data from a mobile app- (patent) Method for detecting the changing point of road (https://doi.org/10.8080/1020170128465)+ Development of a POI (Point of Interest) quality enhancement system using user search queries from a mobile app+ Development of a road alignment extraction algorithm using vehicle and mobile app vehicle trajectory data+ Development of an HD map automatic generation system based on LiDAR, vehicle sensors and GPS data+ Definition and development of methods for HD map quality assessment and index generation based on ISO 19157+ Development of accuracy prediction for HD map based on map quality index derived from vehicle sensors and GPS data