All work
A lending platform at a large bank
A large estate of thirty-odd repositories with strict security requirements and a rule that every change to data must be traceable — who made it and when.
What it is
A large estate: around thirty repositories — services, interfaces, shared libraries, environment configuration. Deals, offers, rates, tariffs, reference data, documents, approval processes.
Strict requirements for security, and for every change to data being traceable: who made it and when.
Engineering documentation
Worth mentioning separately: the internal documentation — a guide to the layers, a checklist for taking a new entity from start to finish. That answers the fear of being left alone with code nobody understands — and it is the same thing I bring to the projects I build for clients.