Drupal Module and Site Development

I need assistance developing for a Drupal-based site. You will be responsible for a few of the tasks necessary to launch a beta version. At a general level, I will need assistance with site optimization, caching, indexing, performance and site security tasks. I will also require modifications to the Drupal framework, including custom scripts, functions and other development necessary to support the site's functionality and look and feel. Tasks include custom module development and/or modifcations of existing modules. Finally, I need expertise in developing the user interface using the Open Lazslo platform or a similar technology set. The site will rely upon a rich and complex taxonomy, and the navigation system needs to graphically support the novel display and presentation of data, navigation, and terms. The project owner will provide complete description of the requirements, though expects to work iteratively and collaboratively with the developer. You will need to provide your own development environment as well as test servers. When ready for beta launch, you will be responsible for migrating the site to a new server and assist with the final release. After launch, there will be releases outside the budget and scope of this project, and the project owner would prefer to form a long-term working relationship.