Funding Engineer, Core Developer
2012 - 2015GrowMobile (Acquired by Perion)- Built the majority of the product from scratch before the acquisition.
- Created the dashboard using Ruby on Rails to all advertisers managing campaigns, with reports for viewing. The UI is Twitter Bootstrap.
- Developed the back-end with API integration to 100+ ad networks, an attribution server to track ad clicks, app installation, and real-time attribution. Used MongoDB as the data ingest store, and Vertica as a data warehouse for the reporting and analysis.
- Managed 100+ servers in AWS and handled most operations including Bootstrap servers, deployment, monitoring, backup/restore MongoDB, and load balancing.
- Built an RTB server using Go.
- Created a mobile client SDK (Android, iOS, Unity).
Technologies: Amazon Web Services (AWS), MySQL, Vertica, Redis, MongoDB, Ruby on Rails (RoR), RubySenior Engineer, Manager of Back-end System
2006 - 2010Adify (Acquired by Cox)- Built portions of Adify, an ad-serving technology platform to power and service vertical online ad networks.
- Designed and implemented a reporting engine including UI and back-end data pipeline.
- Implemented a billing and payment system.
- Implemented campaign/account management.
Technologies: .NET, SQL, C#Lead Engineer
2005 - 2006Yahoo- Designed and implemented a back-end framework for Yahoo! Health/Lifestyle property using PHP.
Technologies: MySQL, PHPLead Engineer
2000 - 2005Siebel System (Acquired by Oracle)- Created a field service scheduler/appointment booking engine using C++.
- Owned the assignment engine as a common component for entire Siebel vertical of applications using C++.
- Built the field service dashboard module with Gantt chart to manual a schedule of field engineers.
- Created parts of the Siebel Call Center application and the Siebel sales application.
Technologies: C#, Java, C++
Jianfeng Wang
Ad Serving Developer in Sunnyvale, CA, United States
Member since May 14, 2016
Jianfeng has over 10 years of experience as a full-stack engineer with a focus on back-end systems. He's worked at both big companies like Oracle, Yahoo, a few small startups, Adify, and GrowMobile. He has built scalable web apps, ad serving systems, and AWS management systems.
Jianfeng is now available for hire
Portfolio
- GrowMobile (Acquired by Perion)Amazon Web Services (AWS), MySQL, Vertica, Redis, MongoDB...
- Adify (Acquired by Cox).NET, SQL, C#
- YahooMySQL, PHP
Availability
Part-time
Preferred Environment
GitHub, Sublime Text, Ubuntu, MacOS
The most amazing...
...thing I've built is GrowMobile, from scratch to launch in 6 months. The system serves 100M daily requests, generating $10+M in revenue in the first year.
Employment
Experience
- SwordWind: Kids Safety Product on Android
Mobile App to track kids location, app usage, rule setting (school hours, total hours of app usage, permission on certain apps). Parents can view reports and receive alerts.
- Wire2PI
RealTime Video/Audio streaming from your Raspberry PI, based on WebRTC
- Android Casual Game
Mobile Game on Android.
Skills
Languages
Python, Java, Ruby, C++, C#, PHP, SQL, GoFrameworks
Ruby on Rails (RoR), Bootstrap, Django, .NETTools
Git, Sublime Text, GitHubPlatforms
Linux, Android, MacOS, Ubuntu, Amazon Web Services (AWS)Storage
Redis, MongoDB, MySQL, VerticaOther
Ad ServingParadigms
Agile Software Development
Education
- Master's Degree in Computer Engineering1997 - 2000Vanderbilt University - Nashville
- Master's Degree in Eletrical Engineering1994 - 1997Tsinghua University - Beijing China
