How does your company handle code reviews and release management?

I'm co-founder, CTO, and lead engineer/architect of my small company/startup (among the 12 other hats that I wear) .

As the head of the company and senior-most engineer/architect, currently I am the one who does final code reviews and prepares releases to ship to production. The team does initial code reviews amongst themselves which is a good first pass, but when I come in, I almost always have change requests. Sometimes the changes are basic, but often they are business-rule based. And certainly the preparation of the release requires a high degree of business case knowledge, timing and expertise.

I am looking to pass the torch and hire someone who can do these code-reviews and ensure high code quality and high adherence to the specs and the business case.

What role or skillset do you think is best for this? Is this just a senior engineer? I would think a skillful senior engineer wouldn't want to be doing code-reviews all day long.

How does your company handle code reviews and release management?