NEM is open sourcing core and looking for new devs, especially for the NEM wallet.

NEM has recently open-sourced its core. http://blog.nem.io/open-sourcing-the-nem-core/  That now means the NCC is fully open-sourced and all materials are available for third party devs to build on it and/or help us make it better.  

Additionally, I do know that a good deal of XEM has been set aside by the developers to pay rewards to future developers that enter the NEM ecosystem.  If you are interested please make contact at the NEM forum or send me a PM.   https://forum.ournem.com/technical-discussion/call-for-developers-designers/

More information about NEM http://blog.nem.io/overview/