Model the core domain objects, state transitions, approval policies, and audit history for an employee expense management system.
Design an in-memory expense management system. A candidate can submit an expense, it routes through one or more approvers according to a configurable policy, and eventually reaches a reimbursed or rejected state. Start by clarifying the scope and key objects.
Work in the provided coding workspace while explaining your decisions to the live interviewer. Validation may use inline tests, examples, comments, or a verbal walkthrough.
Practice this problem in the live coding workspace while the interviewer probes your clarification, implementation, trade-offs, and validation.
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