By City AM reporter Each week we ask a City figure to take a trip down memory lane. Today, Flavilla Fongang, founder of creative agency 3 Colours Rule and CEO of networking platform Black Rise, takes us through her career, from McDonald’s to the most influential woman in tech What was your first job? My very first job was at McDonald’s. It was a great introduction to the world of work, teaching me the basics of customer service, team work and the importance of a strong work ethic. What was your first role in the City?My first role in the City was as a customer for an international event compan…