| Product |
Front End |
Back end |
Database |
Others |
| Twitter |
Ruby on Rails (RoR), JavaScript, jQuery
LabJS, Modernizr, JSON-P, oEmbed |
Scala |
Cassandra |
Java, C, Python, Mustache templating language |
| Facebook |
PHP, XHP, Hiphop for PHP, JavaScript |
C, C++, Java |
Cassandra, MySQL |
Python, Erlang |
| LinkedIn |
JSP, Apache Coyote Web Server |
Spring MVC, Linkedin spring, grails, |
Oracle and MySQL |
ActiveMQ for JMS, Lucene as a foundation for search, DWR, Jetty, Eh-cache, Quartz, Spring remoting. |
| YahooMail |
HTML, CSS, JavaScript (with YUI 3) |
PHP |
MySQL |
Apache Traffic Server (formely known as Yahoo! Traffic Server). |
| Google + |
Closure framework, including Closure’s JavaScript compiler and template system, HTML5 History API |
Closure templates server-side, C++, Java, or Python |
BigTable and Colossus/GFS |
MapReduce |
| FourSquare |
scala(lift framework) |
scala
Amazon S3 for hosting, /img/ folder which is served by nginx directly |
MongoDB |
load balancer(s): nginx/0.8.52
Lift- A web framework written in scala. |
| Youtube |
Python |
psyco, a dynamic python->C compiler |
MySQL |
| Quora |
Python and JavaScript |
LiveNode/webnode2, Thrift (Communicate to backend)
Amazon EC2 and S3 for hosting |
MySQL + memcached |
C++
Load Balancing: nginx in front of HAProxy |
| Viddler |
PHP, Python |
Rails 2.x, ffmpeg/mencoder/x264lib, Java 1.6 / Spring / Hibernate / ehcache, Erlang
Amazon EC2 and S3 for hosting |
Mysql 5.0 |
Hadoop HDFS (distributed video source storage)
Nginx/Keepalived (Load balancers for all web traffic)
Wowza (RTMP video recording server)
Mediainfo(reporting video metadata)
Yamdi (metadata injector for flash videos)
Puppet(configuration management)
Logcheck(log scanning)
Duplicity(backup) |
| StackOverFlow |
jQuery, ASP .NET |
C#, Microsoft ASP.NET (version 4.0), ASP.NET MVC 3, Razor. |
LINQ to SQL, some raw SQL Server |
HAProxy (for load balancing), Bacula(for backup), Redis(caching layer) |
| Disqus |
jQuery,EasyXDM, Sammy, Flot, Raphaël, JSHint |
Python scripts, Django, Celery, South |
PostgreSQL, memcached |
HAProxy + heartbeat (Load balancing) |
