Software Engineer II - Core Experience

Responsibilities

• Develop and maintain payment features for global merchants, including card, Apple Pay, Google Pay, and QR-code payments.
• Build core business logic in Kotlin for Android and Linux-based payment terminals, payment SDKs, and backend systems.
• Contribute to C++ libraries central to Adyen’s payment business logic.
• Integrate payment solutions with a variety of cash registers and standards.
• Write and maintain unit, integration, and automated product tests.
• Debug Android applications and collaborate with engineers, product designers, and business stakeholders.
• Mentor and grow other engineers through code reviews, design reviews, and over-the-shoulder debugging.

Requirements

• 5+ years of experience writing Kotlin code.
• Proficiency building software for the Android platform.
• Experience developing enterprise-level SDKs and libraries used by other engineers.
• Expert knowledge of Kotlin, Android SDK, Jetpack Compose, Coroutines, Gradle, and dependency injection.
• Experience maintaining comprehensive automated unit and integration test suites.
• Ability to mentor engineers and collaborate effectively across technical and business teams.
• Excellent verbal and written communication skills in English.
• Preferred experience with C or C++, security best practices and standards, Bluetooth-connected devices, and the payments industry.

Benefits

• Full-time role based in Adyen’s Chicago office.
• Office-first work model with in-person collaboration; remote-only work is not offered.
• Adyen aims to respond to applications within 5 business days, and the interview process typically takes about 4 weeks.