Completing a degree ends with graduation. More information on graduating is available in Instructions for Students (students studying under the new curriculum, i.e. students who have received a study right to the Faculty of Arts on or after 1.8.2017) and in Flamma (students studying under the old curriculum, i.e. students who have received a degree study right to the Faculty of Arts on or before 1.8.2016). However, studying and learning need not end with graduation; you may complete additional studies at the Open University, as continuing education at the University of Helsinki Centre for Continuing Education, or as non-degree studies. Get to know also the University's webpage Other study options.
You'll find information about work life on Career services pages.
The Studies in the teaching subject for subject teachers page on the Instructions for students -website contains instructions for applying for an equivalency certificate.