Exactly. With some experience the backend can be built by a single person in about 3 months if you have access to good testing data. I've done it. Customer ran

Exactly. With some experience the backend can be built by a single person in about 3 months if you have access to good testing data. I've done it. Customer ran verfication against their legacy mainframe, software was accepted right at delivery, 0 bugs found. Afaik it is still running in operations, with ofc some changes and adaptations over the years.