This job posting is seeking a NodeJS developer to build out the backend platform for a mobile application. The ideal candidate will have experience with NodeJS, JavaScript, HTML5 and working in fast-paced development environments. Key responsibilities include designing and developing servers to power an education service, solving performance and scalability issues, challenging practices to improve the solution, and collaborating with other developers. Requirements include extensive web services experience, expertise in technologies like NodeJS and MongoDB, experience building scalable solutions, and 5+ years of experience.