Database/OLAP internals

In my role as a Contributor at Databend, I focused on enhancing the query engine by implementing features like bloom-filter and range filter for data-skipping. Additionally, I optimized query performance through top-n pushdown and added support for Interval data type, contributing to the overall efficiency of the system.

Responsible for experimentation(A/B testing) service; built the development environment and data syncing between different environments;

Live Video Analyzer. Responsible for video data pipeline, ingestion to sinking, and media data generation in real-time, like images, mp4, and other AI powered meta-data (object bounding box etc).

Keyword: Media Ingestion, RTSP/RTP, RTMP, HLS, Dash, WebRTC;

Video Indexer service for auto-generate transaction; was responsible for the data-pipeline, processing media file, generate transcript and re-embed back to the media content.

Microsoft Stream; core front-end developer, developed SSO, OEmbed service and multiple pages; we built the web site from scratch up.