Senior Backend / Data Platform Engineer – Customer Data

ING Belgium NV/SA; Brussel Hoofdstad; On-site; EUR 80,000 - 140,000; Full time

Job summary

ING Belgium NV/SA is seeking a Platform Engineer to help shape the backend platform powering MADP capabilities. You will design and implement scalable services and contribute to an event-driven architecture with reusable platform components.

You will define APIs, model domain data, and support CI/CD, reliability, and multi-tenant operations. Collaboration with Architects, Data Stewards, and Product Owners will be essential to keep the platform observable and secure.

Qualifications

• Strong backend development experience with Java/Spring Boot and event-driven systems.
• Experience with event sourcing and CQRS patterns.
• Knowledge of API design and integration patterns.
• Data modelling and data lifecycle management expertise.
• Familiarity with cloud and distributed infrastructure.

Responsibilities

• Develop platform-level backend services and architecture supporting MADP capabilities.
• Contribute to event-driven architecture with event sourcing, CQRS, messaging; ensure reusability and scalability.
• Design robust, versioned APIs and integration patterns; ensure backward/forward compatibility.
• Model domain data and manage schema evolution with governance considerations.
• Contribute to CI/CD pipelines, branching strategies, and promotion flows; improve automation.
• Ensure production-ready, observable, high-availability, multi-tenant platform.

Skills

Backend development

Java / Spring Boot

Event-driven systems

Kafka

Event Sourcing

CQRS

API design

Distributed systems

Data modelling

Data governance

CI/CD

Git workflows

Cloud infrastructure

Tools

Kafka

Spring Boot

Git

Job description

Key Responsibilities

• 1. 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
• 2. 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)
• 3. 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)
• 4. 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
• 5. Operability & Reliability Ensure solutions are production-ready and observable Contribute to: Monitoring & observability Incident resolution Performance optimization Support a high availability, multi-tenant platform
• 6. 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

Required Skills & Experience

• 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

About ING

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.