Comment by bmcquade

You want to connect the dots between the unique skills/strengths you bring to the job and company objectives. Reading what you wrote I think you can frame this as "I own problems end to end to ensure a successful outcome. I do whatever needs to be done, even when (especially when?) this involves responsibilities beyond writing code." Then you give examples of how you have done this, connecting the dots to how the things you did ensured a successful outcome. This is a trait all companies want to hire for so it should help you to show how you stand out relative to other candidates. As others noted avoid words like "like cto", "polymath" etc when describing yourself. These are too abstract and will not help you to show the company why they should hire you.