Develop new functionalities for one our games in Windows Phone

We've created and published a new game called for Windows Phone recently. Hover Cabs [login to view URL] Now we're considering to create new updates to implement in this first version for Windows Phone. We require extra help to integrate more features in the game for the following 1st quarter of 2015. We're looking for a freelancer who is able to collaborate full time for the next three months (January to March 2015). This freelance must have published at least 1 game in Windows Phone and 2 games in iOS or Android. We're going to require have a fluent communication everyday by phone, Skype and e-mail. Would be very good if the freelancer is living in Barcelona, Spain. REQUIREMENTS: - Large experience developing videogames with Unity3D for Windows Phone. - Large experience developing videogames with iOS and Android. - Large experience developing videogames optimized with great performance with top quality 3d graphics. - Some years of experience developing videogames for mobile. - Must participate developing the following tasks: IA, GUI, Scripting, Physics, Server communications within unity3d, third party API's like Facebook... - We require high availability to dedicate in our project (full time) - Availability to collaborate in future projects around 2015 - Fluent English by phone, Skype, email, and get used to online project management tools. - We require a very high talented professional with extended communication skills to collaborate with our team in Barcelona. - We're looking for someone creative, motivated, proactive and able to innovate. SOME OF THE TASKS WE MAY ASK YOU TO DO: - Integrate new tracks in the level system. - Integrate a metric system to track the players. - Improve our tutorial. - Weekly tournament and friend filter in the leaderboards. - Improve how the game interpolate when player reach a new game zone. - Integrate quick-time events in the game. - Improve the GUI and visual feedback in interface and gameplay. - Integrate customization for player cars. - Improve the in-game camera. - Integrate swipe system to change the lane of the car. - Add extra functionalities in the passenger stops. - Improve the player garage. - Add daily missions. - Integrate downloadable bundle assets to reduce the final weight of the game.