tinkerer:
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The tinkerer is a meddler, a clumsy engineer with no specific skills.
In old times the tinkerer was a nomad worker going from village to village and from house to house in order to repair domestic objects (e.g. sealing copper pots with a layer of cassiterum in order to prevent poisoning from the rusting copper).
Nowadays, the notion of the tinkerer relates to the unskillful worker who works in a makeshift way often just for time to pass by, normally not having a particular purpose or plan in mind, neither wishing to arrive at rigid outcomes. The tinkerer likes manipulating thinks in an unskillful and experimental way through working with whatever can be found around.