If you only have six people, maybe :] But we're commenting on a post that's talking about the best time to introduce an OKR process. At my company we don't have an "API guy" and an "Android app guy", we have 30 or so different teams that my team interfaces with in a company with thousands of engineers. We can't just "thrash it out" on Slack at a company of this size.
You need to try and think about what things look like when the company is much, much larger.
You need to try and think about what things look like when the company is much, much larger.