EF Labs

 The planet’s best and biggest online English school
Originally conceived in collaboration with Apple, the EF EfektaTM System now powers the largest digital learning service in the world - with more than 13 million users worldwide. Efekta is the heart of Englishtown.com, EF’s online learning service, as well as our hundreds of brick and mortar language schools worldwide.
Hard code requires big brains
Not only will your job be cool, but so will your team. EF Labs is led by some of the world’s leading computer scientists. And the problems you’ll tackle will be challenging and fun to figure out. At EF you’ll be working alongside some of the most talented developers in China.
Find more on: http://careers.ef.com/categories/technology/learning-labs/