Adyen

Adyen operates a global payment processing platform built on a single codebase that handles in-store, online, and mobile transactions for enterprises including Microsoft, Uber, and eBay across hundreds of payment methods and dozens of currencies. Unlike competitors that rely on acquisitions and integrations, Adyen built its entire payment stack in-house, from gateway and risk management to acquiring and settlement, giving the company unusual technical control over the full payment lifecycle. Engineering challenges include maintaining sub-second authorization latency across a globally distributed system, developing real-time fraud detection that adapts to regional payment behaviors, and ensuring the extreme reliability required when processing billions of euros in daily transaction volume. Adyen's hiring patterns reveal a distinctive engineering culture that emphasizes full-stack ownership, with demand for engineers who can work across the payment infrastructure stack from low-level networking to merchant-facing APIs.