Experienced Fullstack Developer

TenMax, September 2017 - September 2021

TenMax is a software company in digital advertising, focusing on real-time bidding ecosystem. It has a strong vertical integration in this domain, covering DSP, SSP, ad exchange, DMP, creative tools, outdoor ads, etc.

• Managed roadmaps of various system components as well as participated in their development, including SSP, DSP, ad exchange, bidding engine, ad scripts, data pipeline, etc.
• Led an epic (1+ year) project of the 2nd generation SSP system serving 500+ ads per second, increasing overall revenue by 30-50%. The development was carried out in strangler fig pattern with zero downtime.
• Created a data sampling technique and tool, reducing Spark development time cost by 80-90%.
• Designed and implemented an interactive ad component framework in one week, which has derived more than 50 creative rich media ad layouts, serving 20M-30M impressions monthly.
• Improved the agile development process, reducing 30-50% potential defects in the long run.

Noema, 2015 - 2017

Noema was a short-lived software company which worked on social media data analysis, mainly focusing on Facebook.

• Designed, implemented, and maintained a web scraping system on AWS, including scheduling, auto scaling, and scraper.
• Invented a scrapping method against the everchanging Facebook UI, reducing maintainence cost by 70-80%.

Potix, 2010 - 2015

Potix is a software company which created ZK, an open source server-centric Java web component framework.

• Developed and maintained ZK core library, components and themes.
• Developed ZK Pivottale, a commercial component similar to Microsoft Excel pivot table with an OLAP-like data model. I redesigned the data engine, making it 4 times faster with 95% memory reduction.