- Conducted a thorough analysis of a legacy ETL system from an external vendor and identified several critical performance inefficiencies within the first week of joining the company. - Deciphered the complex transformation algorithms used in the ETL process and developed a comprehensive flowchart to facilitate future refactoring efforts. - Delivered a proof of concept (POC) to demonstrate performance bottlenecks caused by the use of Lua scripts in Redis, providing actionable insights for optimization.

- Collaborated with Product Managers to clarify details outlined in the Product Requirements Document (PRD). Translated the requirements specified in the PRD into a corresponding Technical Design, ensuring seamless alignment between product needs and technical implementation. - Led the redesign of the architecture and algorithms for a user data online-offline integration system, including the development of a successful Proof of Concept (POC). Contributed to significant improvements in the system's data processing speed, enhancing overall efficiency. - Managed and developed microservices within the iKala CDP platform, including a microservice responsible for extracting user behavior data from BigQuery.

- Played a key role in maintaining and developing the ETL (Extract, Transform, Load) system for Tagtoo tracking, ensuring the smooth and efficient processing of data. - Designed and developed Keyword Feed System on GKE (Google Kubernetes Engine) leveraging web crawlers and machine learning techniques. This System reduced the time required for advertising operators to brainstorm and select keywords for Google Ads campaigns. - Developed and maintained Python parsers for hundreds of e-commerce websites, composing advertising product feeds and ensuring accurate data retrieval. - Collaborated closely with sales and advertising operators to identify and troubleshoot issues related to low advertising performance.