Java Engineer - Business Banking @ING Hubs RO

Location: Bucharest, 10, RO

Employment Type: Full time

Discover ING Hubs Romania

Here’s a sneak peak of what our colleagues say about working within ING Hubs Romania:

• At ING, we're building the solutions of tomorrow, today | 80% of our colleagues in Romania agree

The Mission

Customer Data is a key engineering domain within ING Bank NL, responsible for the systems that store, update, and expose customer information across the entire bank. Every product domain, like Payments, Daily Banking, Lending, Mortgages, Business Banking, depends on our APIs and services to function correctly.

Our teams design and maintain customer‑data capabilities used in all digital and assisted channels. This includes identity details, addresses, mandates, roles, and other critical datasets. We focus on high availability, low latency, strong data consistency, and secure access patterns.

You will work in mixed Romania-Netherlands teams, collaborating directly with Dutch engineers on services that handle high traffic, strict regulatory requirements, and complex business logic.

Our engineers usually like this role because it offers direct collaboration with Dutch engineering teams, ownership over core banking data services, the opportunity to influence architecture and long‑term system direction, work on stable, long‑lived services with meaningful complexity and a strong engineering culture with a clear emphasis on code quality, testing and maintainability.

Your day to day

Even if you’ll start your day from the comfort of your home or drink your morning coffee in our office’s garden, your day will be quite similar when comes to tasks. Here are your daily responsibilities:

• Build and maintain high‑quality Java (17+) Spring Boot microservices

• Working with Kafka, Docker, OpenShift, AzureDevOps, Oracle/Cassandra, ELK stack

• Design and evolve REST APIs, domain models, validation flows, and integration contracts

• Participate in architecture discussions: data models, service boundaries, event flows, performance constraints

• Perform code reviews, enforce engineering standards, and coach less experienced team members

• Provide estimates and contribute actively to planning and refinement sessions

• Implement comprehensive testing:

  • Unit tests

  • Integration tests

  • Functional tests

  • Performance & load testing, when relevant

• Investigate, reproduce, and fix issues across all environments (test, acceptance, production)

• Improve CI/CD pipelines, deployment workflows, and overall development practices

• Produce and maintain technical documentation for deployments, configurations, and service ownership

What you’ll bring to the team

• Experience: 5+ years backend development experience in enterprise or distributed systems with Java, Spring Boot

• Tech stack/ knowledge:

  • Mandatory:

    • Solid knowledge of REST API design, validation, error handling, and contract evolution

    • Hands‑on experience with Spring testing libraries

    • Proven capability to mentor and support team members

    • Comfortable working with Agile methodologies and modern SDLC practices

  • Nice to have: Microservices, Azure DevOps, Docker

• Foreign languages: English (advanced)

• Education: Bachelor’s Degree or higher in Computer Science or a related field - mandatory

If you want to deep dive into the processing of personal data conducted by ING Hubs Romania during the recruitment process and your rights related to it, read the privacy notices on our website (make sure to scroll until you reach the Data Protection section/ Candidates tab).