Expense Rules Engine: Per-Expense, Per-Trip and Composite Rules

CodingRipplingLast reported September 2026High Frequency

Reported: 19× across candidate reports
First seen: October 2025
Last reported: September 2026
Also asked in: Phone Screen
Reported outcome: mixed

Problem Overview

The round: a coding round (onsite, and in several reports the phone screen): the rules engine behind a corporate credit card. Managers set policies so employees do not misuse the card. Three graded parts; one recruiter told a candidate that with AI the bar is all three, without AI two.…

11 candidate-reported follow-ups — the exact probes interviewers asked, with the trigger for each
The rest of the problem statement — full requirements, constraints, and edge cases
Approach and trade-offs — what passing candidates did, and the mistakes that sink people

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Verified Source

Every question is reconstructed from multiple independent candidate reports. Verbatim follow-ups, not invented ones.

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Technical claims, formulas, and scale numbers are reviewed against primary sources.

Interviewer Follow-ups

The exact follow-ups reported by candidates, with the trigger that prompts each one — plus the mistakes that sink people.