Amazon is a business that has classic technology-heavy segments that involve every type of engineer/programmer/developer and it has retail segments (retail customer service, retail warehousing, retail logistics, etc.), among countless others (HR, accounting, legal, marketing). It does both traditional retail and sells technology products & services (Kindle, smart speakers, tablets, AWS, et al.). At this point they're even doing custom chips; and of course they're increasingly into the media and advertising businesses.

For a monster like Amazon it particularly doesn't make sense to call it a technology company or an ecommerce company (or a media company or an ad company). It's a company - really a conglomerate - and it does/sells x y z. AWS is as much a critial part of what Amazon is today as its retail business (on a value basis, AWS is drastically more valuable, and will be even more so in the future). One day they may be split apart, however that is likely a decade into the future or more.