Willhaben is one of the top 10 most visited websites in Austria. It is the dominant classified ads platform of the country. This large microservice system boasts an impressive 8.5 million unique clients per month, 1.8 billion page views per month and hundredths of microservices.
I studied Software Engineering & Internet Computing with an emphasize on Software Engineering, Distributed Systems and Web Development. If you're interested, here is my master's thesis on microservices and image processing.