Hashimoto on two types of people in a software organization

For software solutions, there are two main groups: practitioners and technical decision makers (TDMs). Practitioners are the main users of a piece of software (and in the case of OSS, adopters, though not the case always). TDMs are the higher level management with budgetary discretion that are making broad stroke technical decisions.

Source: Redis and the Cost of Ambition | Lobsters