I would suggest you do this one: MCSD (Solutions Developer). Take a look: Developer certification path
The globally recognized standard for developer excellence
Demonstrate your expertise at designing and developing fast and fluid Windows 8 apps. There are two paths to achieving this certification—using HTML5 or C#. (New to IT? Learn about MTA certification for new entrants.)
Earning an MCSD: Windows Store Apps certification will qualify you for such jobs as software developer, web developer, and quality engineer.