Code review is soon to be an outmoded concept, (un)fortunately. You have to design orthogonal code (e.g. independent modules in a modular monolith, or microservices) and soak test using canaries.
No code is truly orthogonal if we want it to interact in some way. One microservice might DoS antoher one. In a monolith, some process may take up all resources, and so on.