“BERLIN — Wojtek Świeca was startled when he received an email from Deliveroo on Monday notifying him, like the rest of the company’s roughly 1,100 other riders across Germany, that it would pull out of the German market as of Friday.

“It definitely came as a shock. I would never have thought that any company, in any field, would just disappear from the market within four days’ notice,” said the trained jazz guitarist, who spent the last three years working for Deliveroo in Berlin.”