History /
Project to set up weaving factories in Lodz in the 1880's [2]
The development of the industry in the 19th century Łódź was to a great extent. Within a hundred years it changed from a village of less than a thousand people to half a million industrial centre.
That's where the term Lodzermenschen comes
de.m.wikipedia.org/wiki/Lodzermensch
In popular culture it's the topic of the novel and then film The Promised Land. It tells a story of three friends a Pole, a German and a Jew trying to set up their own factory.
en.m.wikipedia.org/wiki/The_Promised_Land_(novel)
Łódź was also pretty multicultural with Poles, Jews, Germans and Russians and their respective cultures and religions.
You may try contacting the state archives in Łódź for information about your family's metrical records as for their work experience I'm not sure the archives may find it easy if you don't know where he worked but that information might be in the church records assuming your family members were born, married and died there. Usually only their social status is mentioned though.