Java Engineer in Java Application Core Components team

EngineersOfAI; Amsterdam; On-site; EUR 90,000 - 120,000; Full time

Job summary

Adyen in Amsterdam is seeking a Senior Software Engineer for Java Application Core Components (JACC) to build and maintain core Java tools and frameworks used across all Java applications. You will shape how teams design, structure, and deploy their services in a company-wide platform.

You will join a lean team of six Java experts, work in a Kanban-like setting with minimal process overhead, and gain real influence over the architecture through participating in large migrations and close

Qualifications

• 5+ years of experience in Java backend development.
• Strong skills in core Java and API design.
• Track record of building high-quality software with thorough testing.

Responsibilities

• 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 teams on how frameworks and libraries solve business problems.
• Design and evolve workflows used by other teams, identifying pain points and improvement opportunities.
• Collaborate with Kubernetes, deployment, and security teams to ensure integration across the tech stack.
• Advocate for best practices, define boundaries for framework usage, and run workshops.

Skills

Java backend

Code/API design

Testing across levels

Team collaboration

Stakeholder alignment

Tools

Kubernetes

Gradle/Maven

Spring

OpenAPI

Feign

Job description

This is Adyen

Adyen provides payments, data, and financial products in a single solution for customers like Meta, Uber, H&M, and Microsoft - making us the financial technology platform of choice. At Adyen, everything we do is engineered for ambition.

For our teams, we create an environment with opportunities for our people to succeed, backed by the culture and support to ensure they are enabled to truly own their careers. We are motivated individuals who tackle unique technical challenges at scale and solve them as a team. Together, we deliver 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: we build and maintain 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 one of the leading players 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 we provide 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 (Kubernetes infrastructure, deployment, security) to make sure our components integrate well across Adyen's tech stack.
• Advocate for best practices across Adyen and define boundaries/guidance on how the frameworks/libraries we maintain can be used. This should be achieved by 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 our 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

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