We were subcontracted to help our client in expanding various internal systems of a telecom operator. The goal was to allow the operator to open its business for legal entities, rather than to only private individuals.
It was a business critical task for the end customer. So, we had to be very careful to both introduce new block of functionality and keep all the old features working as a charm.
The technology stack was prescribed. At first glance, we didn’t have that much to change there. But in order to speed-up development/deployment process, we used Docker containers.
J2EE, Activiti BPMS, Docker
Product was successfully delivered to the end customer, and the legal entities joined its customer base.