Replaced costly outside consultants with an in-house legal function built from zero: six lawyers, all the processes and playbooks. Internal-client satisfaction went from 6/10 to 9/10.
The shareholder was expanding the business into the UAE and across several EU regions. That created real demand for legal work, and until then it was all handled by outside consultants. Costly, and low quality: consultants never understood the business deeply enough to be useful.
Building something in fintech that the lawyers say can't be done? Start there.