HR-tech, payroll-correct, GDPR-native, multi-tenant. Personio isn't FAANG-scale — they want correctness, compliance, and clarity over cleverness. This site has the strategy, the actual take-home walkthroughs, and live demos for the technical questions.
Company at a glance, the PersonioCode values, full interview loop breakdown, hiring manager prep, STAR story templates mapped to their values, smart questions to ask, pitfalls to avoid, and a 7-day study plan.
Open →Full walkthrough of Personio's actual take-home (reminder service from their GitHub), live coding problems, system design canonical questions, plus domain deep dives on payroll correctness, GDPR, and multi-tenancy.
Open →The domain knowledge that separates senior candidates: decimal arithmetic (no floats!), idempotency keys, versioned calculation rules, replay safety, plus GDPR right-to-erasure with the soft-delete / anonymize / hard-delete decision tree.
Open →