I have Emerald 9 and Cobalt 8. Is there any extension related to job boards can be installed?

Hello GillianT,
actually Cobalt & Emerald would be enough to build such an application. Cobalt is a "Content Construction Kit" plus some other features that allows you to build a directory-style website and certain workflows. Emerald would help with monetization and access restriction... For sure, you need to have some knowledge and time to be creative with both extensions.

In short, I would not recommend to add another bigger/specialized extension. Makes not much sense to me.
Please, correct me if I missed your point. Maybe you have a special application in your mind.

BTW, I guess this is your post as a Guest ;) Try to re-write your request with more details, or even better re-post it as a registered member. Much easier for you to track your notifications and comments.

hello i did with success for building a jobboard but you need custom work to improve some features

This is what cobalt is created for. Fo something like this. Create Job Board. With these 2 extensions you should be able to do it. Also note that this is what Jimie is duing with Cobalt. He supports very large website which is job board.Tell him what you need and he will be able to create for you.

i have such very large jobboard , thank to cobalt i win great money but i did many customizations (i have programmers in my family) with many tools sh404sef, easysocial (for custom profil) easydiscuss, linkedin, etc my favorite full integration is wordpress (a must have for seo, some people here know my website has great ranking) so everthing is possible