Your question is Improve Architecture of Past Project. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Describe a previous technical project that you have done and talk about the overall architecture in detail, then find ways to improve the architecture of that project. Explain the major components, data flow, interfaces, deployment model, operational characteristics, and the decisions you made. Discuss bottlenecks, reliability risks, cost, observability, data or model quality concerns, and how you would validate proposed improvements.