Yeah, I could have been more clear - the BigCo I'm at is still pretty light on process, and teams are free to use whatever project management approach they want. As seattle_spring conjectured, I was thinking more about technical best practices. I've learned many patterns from the software I work with now, and I've been able to grow from working with really smart engineers that have enough experience to be pragmatic without compromising on quality.

An (admittedly controversial) example is repos-per-service vs a monorepo: now that I've worked at a bigco with a monorepo, I would have used a monorepo at my previous company.