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System Design at N26
System Design at N26
N26 is a European neobank built on roughly 200 microservices in Kotlin and Java, where the engineering problems centre on real-time balances, multi-currency money movement, and a fully mobile banking experience. Interviews focus on financial mobile apps, event-driven account state, payment processing, and the reliability standards required of a regulated bank.
1 guide available•Interview focus: Neobank mobile architecture, event-driven account state, payments, and financial reliability.
N26 System Design Interview Guides
Dec 15, 2025•22 min•
hard
Android System Design: Design a Trading App like Coinbase
A complete Android system design guide for designing a crypto trading app like Coinbase or Bitvavo. Covers Clean Architecture for financial apps, WebSocket chan...
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