A crawler or retrieve for Linkedin

We need help to develop a crawler (or data retrieve tool) to collect some information from Linkedin. (We do not plan to crawl or retrieve complete Linkedin data, that will be un-ethical, maybe wrong). We only need to crawl a very small segment, (maybe a few thousand people of our potential customers). ? Requirement for the project: 1. Well written code in PHP or Python 2. Well tested. 3. Able to crawl Linkedin when a starting point and “selected keywords?? are provided. 4. Code is easy to modify and maintain (in case, Linkedin changes it format in future) 5. Crawled data can be written into a database (MySQL) or a EXCEL file. ? When you bid for the project, ? Please state your experience in developing crawler or information retrieve tools.