developing a SAAS platform for making timetables online

An experienced developer is needed to develop a SAAS platform for making timetables online for universities, colleges and schools. It should have ability to make complex timetables like some of the main compaetitors are offering paid softwares. The time table should be generated automatically after adding details of teachers, classes, class rooms, lessons etc with manual adjustments that can be made even to automatically generated timetable or even entire time table can be generated manually with all the possible features. Complete details will be provided along with detailed features in currently available softwares in the market. Please apply only if you have experince of developing such platforms.