A MediaSpan developer works on creating, implementing, and maintaining software applications for the MediaSpan Network, a leading provider of cross-media advertising and marketing solutions. They may work on various platforms including print, online, and broadcast media. Their tasks include writing code, debugging software, creating user interfaces, and integrating data from various back-end services and databases. They collaborate with a team to understand client needs, develop appropriate software solutions, and ensure the applications are user-friendly and effective. They also conduct testing, troubleshoot issues, and provide ongoing support and updates to optimize the performance of the software.