Senior Backend / Data Platform Engineer – Customer Data

About the Position

We are looking for a Senior Backend / Data Platform Engineer – Customer Data to join our team at ING Bank in Brussels, Belgium. This role is pivotal in designing and implementing backend services, ensuring robust, versioned APIs, and scalable platform-level components.

Responsibilities

Platform Development & Architecture

• Design and implement backend services supporting MADP capabilities
• Contribute to an event-driven architecture (event sourcing, CQRS, messaging)
• Build and evolve platform-level components (not just feature-specific code)
• Ensure solutions are reusable, scalable, and aligned with platform principles

API & Integration Design

• Design and implement robust, versioned APIs for data access and integration
• Ensure backward/forward compatibility and stability of API contracts
• Integrate with upstream and downstream systems (e.g. OnePAM ecosystem)

Data Modelling & Lifecycle Management

• Contribute to domain-driven data modelling
• Manage schema evolution, ensuring minimal impact on consumers
• Ensure alignment with data governance and data quality rules
• Understand and handle data lifecycle complexity (creation, update, deletion, versioning)

Platform Engineering & CI/CD

• Contribute to CI/CD pipelines, branching strategies, and promotion flows
• Support the separation between:
  • Platform lifecycle
  • Tenant/domain lifecycle
• Improve automation, deployment standards, and engineering practices

Operability & Reliability

• Ensure solutions are production-ready and observable
• Contribute to:
  • Monitoring & observability
  • Incident resolution
  • Performance optimization
• Support a high availability, multi-tenant platform

Collaboration & Knowledge Sharing

• Work closely with:
  • Architects, Data Stewards, and Product Owners
  • Operations and Security teams
• Actively document, explain, and share knowledge
• Contribute to a transparent and maintainable platform (no “black box” systems)

Requirements

Core Technical Skills

• Strong experience in backend development (Java / Spring Boot or similar)
• Proven experience with event-driven systems (Kafka or equivalent)
• Solid understanding of:
  • Event sourcing and CQRS patterns
  • Distributed systems design
• Strong experience in API design and integration patterns

Data & Platform Expertise

• Experience with:
  • Data modelling (schema design, evolution)
  • Handling data lifecycle and versioning
• Familiarity with data governance and access control concepts
• Experience building or contributing to platforms (not just applications)

DevOps & Engineering Practices

• Knowledge of:
  • CI/CD pipelines
  • Git branching strategies
  • Deployment and release management
• Familiarity with cloud and distributed infrastructure

We Offer

• Opportunity to work in a global bank with a strong European base
• Be part of a team that empowers people to stay a step ahead in life and in business
• Competitive benefits and professional growth opportunities

About the Company

ING is a global bank with a strong European base. More than 60,000 colleagues serve around 38 million customers and corporate clients in over 40 countries. Working at ING means working with great people: friendly, collaborative, and fun! We empower the people around us and our customers to stay a step ahead. A job at ING comes with autonomy and the expectation to drive progress, deliver a superior customer experience, and create a more sustainable future for people and planet.