Embedded finance — the process by which some of the more complicated, but also commoditized, aspects of financial services are built and wrapped in an API for anyone else to implement in their own products for end users — has become a huge cornerstone of how fintech is built today. Now, one of the earlier and bigger movers in the space is announcing a major round of growth funding to build out its own. Solarisbank, a Berlin startup that provides a range of financial services by way of some 180…