21. Why they are awesome
Easy to update
No need to run special hardware
Can run on the Windows, Linux , Mac
Monthly Subscription
Cheap price
multi choice
22. Team
1 or more
1 Person = Developer + Designer
Most of the team have 5 person
31. Problems
Languages ( ROR , PHP , Python )
Server ( Apache , Nginx )
Cross browser
Hard to determine user request per seconds
Concurrency problems
can’t use native mobile level API ( vibrate,
SMS, etc., )