[npinsker]

In the cases of uptime and conversion rate, might you only implement the change after looking at the desired metrics and verifying that they've improved?

re GP comment: it's more about the tone -- one should seem confident and well-acquainted with what they choose to show -- than the actual numbers. If you told me that you improved conversion rates by 2%, or 20%, I would barely know the difference, but I would see both of those very differently than just "improved conversion rates". If you don't have numbers, I would try to be specific in some other area instead (e.g. technologies used, names of big clients). Similarly, phrases like "had creative input across the full stack" might give me pause -- what does that mean? It implies a low amount of impact; why not say something more attractive, like "contributed and assisted others across the full stack"?