Any by the same token the best developers have a good understanding of Ops. Often these will be the Senior ones and in some cases they built the platform before

Any by the same token the best developers have a good understanding of Ops. Often these will be the Senior ones and in some cases they built the platform before Ops people were hired. But plenty of developers only have a vague picture of what production looks like especially in a complex environment. However they are perfectly able to do their job okay and produce working code.