Reliable:

Web developers carry project from the initial stage to the end stage i.e. to the further deployment and even provide after support to its clients.

Innovative:

If web developers want to stand alone in this competitive world then they should use some creativity otherwise there are thousands of developers further better than you.web developers should keep one most important thing in their mind that it would be the positive point if you deliver services on time.

Flexibility:

Web developers command on both front end as well as back end. There are certain developers who can actually good in front end while other can deal well with back end but there should be flexibility and characteristic of an efficient web developer is that he should posses that much caliber that he can easily deal with both front end and back end at a time.

Competent:

Web developer should use the possible resources in order to offer best to its clients.

Web developer should have good command on these things:

Regular expressions:

They must be familiar with different parsing methods. Regular expressions are not restricted within one language .if developer would not have good command over such expressions make sure that you will learn them surely.

Basic knowledge of SEO:

In order to rank their website in Google they should have basic knowledge of SEO.

Familiar about different platforms:

There is the need that your website should run on various different browsers if you want to increase your sites visitors.

Optimization:

Everyone know that designing and developing fields are poles apart but developers should have a basic knowledge of adobe Photoshop there is no need to know in detail you can accomplish simple tasks.

Cyber laws:

Developers should have knowledge of copyright otherwise you might indulge in certain legal issues.