Java Engineer in Java Application Core Components team

Adyen provides payments, data, and financial products in a single solution for customers like Meta, Uber, H&M, and Microsoft, making it a financial technology platform of choice. For its teams, Adyen creates an environment with opportunities to succeed, backed by a culture and support that enables people to own their careers. Teams tackle unique technical challenges at scale and solve them together, delivering innovative and ethical solutions that help businesses achieve their ambitions faster.

Senior Software Engineer - Java Application Core Components (JACC)

Adyen provides a global, unified platform built by Java application teams across the company. The Java Application Core Components (JACC) team plays a key role in this by building and maintaining the shared frameworks and components that define how other Adyen teams design, structure, and deploy their Java applications.

As part of JACC, you will build and maintain the core Java tools and components used across all of Adyen, shaping how other engineering teams build their services. You'll work on some of the largest ongoing efforts in the company, including 3 large-scale migrations that will shape the future of Adyen's application architecture. You'll join a lean team of 6 Java experts, working in a Kanban-like way with minimal process overhead, and gain real influence over the architecture of a leading player in the payments space.

What you will do

• Design, build, and evolve the internal and open source Java frameworks and components used by every Java application team at Adyen.
• Play an active role in one or more of the team's 3 large-scale migrations that are reshaping Adyen's application architecture.
• Provide hands-on technical guidance to other engineering teams by guiding them on how the frameworks and libraries provided can be used to solve Adyen's business problems.
• Design and evolve workflows used by other engineering teams across Adyen, working closely with them to identify pain points and improvement opportunities.
• Collaborate with partner platform teams such as Kubernetes infrastructure, deployment, and security to make sure components integrate well across Adyen's tech stack.
• Advocate for best practices across Adyen and define boundaries and guidance on how the frameworks and libraries maintained by the team can be used. This includes creating code validation rules, running workshops, and giving presentations to other development teams.

What you bring

• 5+ years of experience with Java backend development
• Strong skills in core Java and code/API design
• Track record of building high-quality software, with testing at all levels
• A communicative, proactive team player who takes ownership, is decisive under ambiguity, and can act as a technical influencer with a multiplier mindset
• Comfortable being a driver: able to build alignment with stakeholders and partners while pushing initiatives for customers

Nice to have

• Experience with Kubernetes/cloud migrations, legacy application modernization, security-related work, or platform development experience
• Experience developing and maintaining libraries/frameworks used by many other developers, either open source or internal
• Experience with build tools, ideally for Java (Gradle/Maven)
• Broader architecture sense across distributed systems
• Familiarity with Spring, Jersey, Feign, OpenAPI
• Understanding of Domain-Driven Design (DDD) and Test-Driven Development (TDD)
• Exposure to AI agent workflows and a DevOps mindset
• Developer advocacy experience: public speaking or training/facilitation skills

This role is based out of Adyen's Amsterdam office. Adyen is an office-first company and values in-person collaboration; it does not offer remote-only roles.