I started my computer technician career as C/C++ developer in Linux/Unix systems, applied on computing & simulations in particle physics for many years in my research activity at CERN.
In addition to research, I enhanced my computer skills working on GIS application development, commencing work with geospatial databases, in particular PostgreSQL and its spatial extension PostGIS.
Now I'm a PostgreSQL consultant in 2ndQuadrant, covering also the role of GIS expert for geospatial databases.