If you have separate developers for writing unit tests, and not every developer writing them as they code, something is already very wrong in your project.

Deployment and infra should also mostly be setup and forget, by which I mean general devops, like setting up CI and infrastructure-as-code. Using modern practices, which lean towards continuous deployment, releasing a feature should just be a matter of toggling a feature flag. Any dev can do this.

Finally, if your developers are ‘code monkeys’, you’re not ready for a project of this scale.