􏰁 Migrated reporting sub-system to Flink, simplifying architecture and reducing data latency from daily to near real-time, enabling multi-dimensional reporting. (Flink) 􏰁 Designed and deployed Airflow infrastructure, optimizing ETL workflow management for improved efficiency. (Airflow) 􏰁 Refactored DSP platform data pipeline, doubling system capacity and improving stability. (Kafka, Kafka Connect, OLAP, OTAP, AWS Redshift, AWS S3) 􏰁 Developed Audience Profile Service and ETLs, enhancing DSP audience targeting with scalable data processing. (Python, Spark, Scala, HyperLogLog, Aerospike) 􏰁 Built and optimized a payment rule engine, enabling near real-time profit sharing calculations. (Python, Scala, Drools, Rete Algorithm)

􏰁 Enhanced web UI for Vpon DSP (Demand-side platform) and Vpon SSP (Supply-side platform) to improve user experience. (React.js) 􏰁 Developed and optimized web APIs for Vpon DSP and Vpon SSP, improving system performance and maintainability. (Ruby on Rails, Node.js)

􏰁 Researched and developed HTML5-based interactive ad creatives and campaign landing pages. (HTML5, CSS, JavaScript) 􏰁 Streamlined creative deployment workflow using Webpack and Gulp, reducing deployment time from 5 minutes to 1 minute. (Webpack, Gulp) 􏰁 Cut ad weather-switch function processing time by 90% by developing a Node.js server and integrating with backend services. (Node.js) 􏰁 Provided technical support for tracking code integration, including Vpon DMP, Google Analytics, and Google Tag Manager.