Walk Through One Past Project

Pick one project you personally worked on and explain it in depth. Cover the problem it solved, the users or customers, the main requirements, the architecture, the critical components, the data flow, the storage and API choices, reliability and scaling considerations, and the trade-offs you made. Be explicit about what you personally owned, one difficult technical problem you handled, how you measured success, and what you would improve if you redesigned it today. Draw or clearly describe the system diagram as part of your explanation.