deep test of an existing procedure

a large application needs a tester who can carefully go thru a number of points (about 50). Every time our coders apply changes or add new features to the app (say once a week) we wants this test done. Every complete test will probably last 4h . Training will probably last 20h. The app deals with punches, attendance and shift planning. This project needs care and some experience with T&A . No coding skill needed. Some Italian or Spanish would be a plus, but not a must.