Senior Full-Stack Developer – Customer Data
Summary
Senior full-stack developer on ING's Customer Data team, building resilient, scalable systems for critical customer data across banking domains. Daily work spans backend Java 21/Spring Boot with Kafka, CQRS/Axon, Cassandra and Oracle SQL, plus frontend Angular and lit HTML.
Senior Full-Stack Developer – Customer Data
About the Role
We are looking for a technically polyglot Full-Stack Developer to join our Customer Data team. You will be part of a high-impact environment where reliability, scalability, and cross-departmental collaboration are key. Our systems handle critical customer data across multiple business domains, with a strong focus on risk management, resilience, and performance. You’ll work with modern technologies including Kafka, Cassandra, Oracle SQL, CQRS, Axon Framework, Angular, and lit HTML, and contribute to both backend and frontend development.
A Day in the Life of a Senior Full-Stack Developer – Customer Data
- Design solutions that fulfill complex business requirements.
- Code smart, efficient, and resilient applications.
- Collaborate across departments to ensure alignment and integration.
- Continuously learn and share knowledge, embedding best practices and lessons learned.
How to succeed
Our biggest expectation is that you’ll stay curious. Keep learning. Take on responsibility.
Requirements
- Master’s degree or equivalent experience in Computer Science or IT.
- Certifications and/or proven proficiency in software development.
- 8+ years of experience in Agile IT projects.
- Strong expertise in:
- Java 21, Spring Boot, Kafka, Maven
- knowledge applying CQRS pattern is a plus
- Familiarity with:
- CI/CD pipelines using Azure DevOps and GitHub
- Monitoring tools like Kibana, Grafana, Prometheus
- Knowledge of additional programming languages (e.g., Python) and a strong willingness to learn new ones.
- Awareness of:
- Security & IT Risk
- Resilience patterns
- Excellent communication skills in English (written and spoken)
Company
We’re a global bank with a strong European base, and our more than 60,000 colleagues serve around 38 million customers and corporate clients in over 40 countries. Joining ING means working with friendly and collaborative people towards making a positive impact on people and planet. We believe in empowering the people around us and our customers to stay a step ahead. Working here means having the autonomy to drive progress, helping to create superior customer value and contributing to our ambition of putting sustainability at the heart of everything we do. Here, we’re more than just a workplace – we’re a community of innovators, problem-solvers, and forward-thinkers, dedicated to making a real impact. Whether you’re just starting your career or seeking the next big challenge, we have opportunities that will inspire and push you to grow. Your future at ING starts with one application. Ready to join? We’ve got plenty of opportunities to match your skills and aspirations!