Senior Java Engineer | Business Banking @ING Hubs RO at ING – Bucharest - Dacia One | Jobyssey

Discover ING Hubs Romania

ING Hubs Romania offers 130 services in software development, data management, non-financial risk & compliance, audit, and retail operations to 24 ING units worldwide, with the help of over 2000 high-performing engineers, risk, and operations professionals.

We started out in 2015 as ING’s software development hub, then steadily expanded our range to include more services and competencies. Now we provide borderless services with bank-wide capabilities and operate from two locations: Bucharest and Cluj-Napoca.

Our tech capabilities remain the core of our business, with more than 1800 colleagues active in Data and Analytics Tech, Tech Foundation and Channels, Retail Core Banking and Architecture, and Global Products and Technology Services.

We enjoy a flexible way of working and a highly collaborative environment, where fair and constructive feedback is encouraged.

For us, impact isn't a perk. It's the driver of our work. We are guided and rewarded by a shared desire to make the world a better place, one innovative solution at a time. Our colleagues make it their job to do impactful things and they love doing it in good company. Do you?

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).

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