You can really showcase your portfolio, ... There are no issues regarding length and it's always available for people to go look at it.
You should say what were the challenges faced, what were the actions and what were the results, ... It shows the employers you're a doer and that you're not just sitting back collecting a paycheck, but helping the company do better.
The basic rule is that there is no rule about the proper length, ... Every word on the resume should be actively selling the candidate.