I have developed a application and I need to work for SEO-friendly URL.

I have following URL structure:

http://localhost:3000/posts/product/testing-with-slug-url-2

and

http://localhost:3000/posts/product/testing-with-slug-url-2-4-23

Is this a good practice? If not how can I rewrite it?

Ok Ill explain about my applicaiton.

My application is based on shopping.

if a customer searched for mobiles. it will redirect to url like this

http://mydomain.com/cat/mobile-3

3 in the url indicates my database id it is used for further searching

After the user reached the mobile page he may need to filter for some brand eg. nokia so my url look lik

http://mydomain.com/subcat/nokia-3-2

The integer at the end refers to 3 category id and 2 the brand id

My doubt is whether the integer at the end of the url will affect seo ranking.