Senior Java Engineer

ING Bank is seeking an experienced Senior Java Engineer to join the Order Manager As A Platform (OMaaP) team in Amsterdam. You will work on a mission-critical global payments platform processing millions of transactions daily, handling Instant Payments and SEPA Credit Transfers across all European ING entities. This is an opportunity to design and develop cloud-native Java applications using market-standard technologies in a dynamic, innovative environment., * Design, develop, and maintain complex Java applications and backend services for the OMaaP platform

• Build internal and external APIs, create orders for execution, and route them through the payment engine
• Implement high-quality, resilient, and idempotent application designs for real-time and batch processing of high-volume asynchronous communication
• Automate deployment, testing, and delivery pipelines from the start
• Provide both functional and technical support for mission-critical applications
• Collaborate with cross-functional teams in a Scrum environment with two-week sprints
• Participate in code reviews, architecture discussions, and knowledge sharing, You will work in the Payment domain within a dynamic, agile team following Scrum methodology and DevOps principles. The team operates with two-week sprints and regular milestone reviews with stakeholders. The role is based at ING's CDR office in Amsterdam (Cedar location). You will work in a collaborative environment with innovative colleagues, combining online and backend application development with a strong focus on quality and continuous improvement.

• University degree in Computer Science or equivalent
• Minimum 8-10 years of professional Java software engineering experience (design, development, and maintenance)
• Strong expertise in Java 21, Spring Boot, Spring frameworks (Spring Batch, JPA), and JAX-RS
• Solid understanding of cloud platforms (OpenShift/Kubernetes) and containerisation (Docker, Linux)
• Proficiency with CI/CD tools (AzureDevOps, Git, Maven) and testing frameworks (JUnit, Karate)
• Strong knowledge of REST APIs, HTTP, mTLS, JSON, and NoSQL databases (Cassandra)
• Experience with Kafka, ElasticSearch, and S3
• Fluent English communication skills; proactive attitude with strong analytical and knowledge-sharing abilities