PostHog has a product-minded engineering organization. Engineers own sprint planning and specing out solutions. Read more on the role of the Product Team in this blog post.
At the same time, engineering small teams are multidisciplinary and have different focuses within the Product. To support Engineering well, Product and Design are cross-functional too and can work within multiple small teams. Instead of Product Managers (PMs) and Product Designers working on everything a small team works on, they have specific goals that trascend team lines.
PMs or Product Designers fully belong to the relevant small teams (up to 2) so both teams have a strong sense that the person is there to support them both equally in respect to the goals, and to make it clear there are no inter-team dependencies.