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What has been the biggest technical or analytical challenge in your career so far?

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1 answer published. Last candidate submission on Jun 15 2026, 12:32pm PDT. Interview question asked to Data Scientists interviewing at Marqeta, Google, Coinbase and other companies. Original question asked: What has been the biggest technical or analytical challenge in your career so far?. Question last reported by a candidate interviewing at Criteo for a Data Scientist interview on Jul 6 2026, 6:46am PDT.