Magnus Hagander is a member of the PostgreSQL Core Team and a developer and code committer in the PostgreSQL Global Development Group.
He mostly works on different parts of the PostgreSQL backend, recently with a focus on security features such as authentication and encryption, and backup/availability.
To pay the bills, he is an open source software consultant, primarily on PostgreSQL and Varnish at Redpill Linpro in Stockholm, Sweden, where he works with consulting, support and training.