Welcome to your interview for the Software Engineer role at Flora Food Group.
The question is on your right: Refactor vs Rewrite Decision. Take a moment with it first.
Talk your thinking through with me if you like - when you're confident, submit your answer and I'll grade it like a real screen. You have three graded attempts to score 7/10 or better.
You are evaluating an aging core service that still powers an important part of a B2B SaaS platform. The system has accumulated technical debt, delivery speed is slowing, and reliability issues are starting to affect adjacent teams, but it also contains years of business logic that would be expensive to rediscover. You need to decide whether to refactor incrementally, rewrite the system, or continue investing in the current architecture for now.
How do you decide whether to refactor, rewrite, or keep investing in an existing system?