Seconding this, I had some similar questions as OP at my Amazon internship (moreso stemming from going from Data Science work to web dev). The thing is every te

Seconding this, I had some similar questions as OP at my Amazon internship (moreso stemming from going from Data Science work to web dev). The thing is every team at Amazon is so different u can find teams moving at breakneck speed in JS monorepos and u can find teams barely moving just fixing random build configs for months without even many unit tests in their repo (some people enjoy maintaining mature software in a customer focused team). I suggest OP browse through the internal code search tool, find a team that fits their needs/values, and then try to find a job under that manager. OP has the unique ability to see the actual day to day work a team is doing before applying, they should take advantage of that. You can find a team like OP describes at any company but how many times can you see the day to day work before applying, take advantage.