いろんなサービスのシステム構成が分かるQA

What are the programming languages and frameworks the top NYC startups are using?Edit
In a conversation with the NYCEDC and ITAC, I learned that no one has a sense of what are the predominant languages and frameworks that people are using.

If you are with a startup or company that has more than 1M pageviews a month and is based in NYC (or the boroughs), can you give a sense of the skills/experience you are looking for? This will help people understand what skills we need to grow...

What are the programming languages and frameworks the top NYC startups are using? - Quora

各サービスのシステム構成の概略が分かるQAです。
いくつか抜粋してみます。

foursquare

Language - Scala
Web Framework - Lift
Database - MongoDB
App Server - Jetty
Proxy Layer - nginx + HAProxy
Hosting - Amazon EC2
Search - Solr
Email - SendGrid
Queuing - Kestrel
JS Library - jQuery
Etc - FogBugz, Git, CIJoe, ReviewBoard

bitly

Languages: Python, some C, and a little bit of TCL (yes, really)
Web Framework: Tornado
Reverse Proxy: nginx
Redirect App Server: AOLserver
Databases: MySQL, Tokyo Cabinet, and MongoDB
Volatile Data Stores: Memcache, MemoryFly (internal)
Hosting: NTT and EC2
Queueing - simplequeue (https://github.com/bitly/simpleh...)
JS Library: jQuery

Voxy

Frameworks: Django 1.2, jQuery
Web Servers: Cherokee, Nginx
Data: Postgres 8.4
Hosting: Amazon EC2, Linode
Caching: memcached
Queuing: Celery/RabbitMQ
Web Services: Sailthru, KISSmetrics, Twillio, Recurly, Discus, Google Analytics, Facebook
Tools: SVN, Unfuddle, Pivotal Tracker, Basecamp, Google Docs/Apps
Mobile: Objective-C, HTML5/CSS3

それぞれ特徴があっておもしろいです。