In light of the new professions that expanded in recent years (coders, graphic design) few sites now provide a platform for professionals to create a portfolio (github, dribbble)
What are the platforms that exist today that allow Web Content/Promotions writers, SEO & project managers to share their portfolio?
How would you go about creating these platforms?
If you're asking about a platforms for project managers (like Dribbble et al), I'd say that probably the reason why such a platform doesn't exist, is because project management isn't really a visual discipline in the way that design or even development may be. Most just tend to use their own website, giving them the flexibility to share their thought-process.
I'm currently in a team of 3 persons building a competitor for creating easy portfolios/cv's, but with main focus on the german market.