In my company:

1) Works with business analysts to design and code applications according to business requirements. Intermediary between engineering and business.

2) Engineering responsible for architecture and heavy lifting. ie; build a framework for the developers to use.

3) Same as 1 with more responsibility.

4) Same as 1 except more experience/skill set is specifically web related.

The way I see it (would be good to hear other opinions):

Developer/Programmer Analyst = looks for bugs. Software Engineer = Integrates the code into live environments Lead Applications Developer = Primarily focused on developing the relevant code Senior Web Developer = "I've been here the longest"

The difference:

1 -completely arbitrary 2 -randomly assigned 3 -words to fill space on expense reports and business cards 4 -another made-up title

Fancy mumbo jumbo words to differentiate somebody from somebody else.

The difference: Money