Ask HN: Software industry sector with small amounts of configuration

What are the less configuration industry sectors? I.e. which sectors tend to be more about writing software using libraries and crafting one's own source as opposed to configuring tools? For an example, for distributed systems the following technologies crop up often enough: + Docker + CoreOS + Vagrant + httpd/nginx + Openstack + Kubernetes + AWS as well as possibly Puppet, Chef, Saltstack or OpenStack. Using most of the aforementioned technologies is configuring them in a config file. Where (within the industry) should those more interested on creating new solutions by hand look?