I don't know backgrounds of the systems but my belief is that the backend is made with Java and Microsoft SQL and servers are maintained by Fujitsu.

Finland is standardizing healthcare applications now due to healthcare centralization and price tag of the project is $2 billion. Doctors, nurses, social workers, and other people that have to use the new adopted application say it's absolute crap (slow, unstable, hard to use, and doesn't communicate well with other systems) and many experts have commented that we should have hired Estonians to do that project because they spent only $10 million for doing the same in Estonia.