Senior Software Engineer (Backend-Java) – Business Banking Cards (w/m/d)

REQ-10114713
11/06/2026
IT Engineering
Frankfurt am Main, Germany
ING Bank

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Do you want to design modern IT architectures and build software solutions that create real business impact?
Do you enjoy taking ownership, thinking beyond individual services, and shaping solutions that fit into a wider application landscape?

Join our Business Banking Cards domain and help us build reliable, scalable, and secure card-related applications. In this role, you will work closely with Business Banking stakeholders and collaborate with Retail Banking teams on shared capabilities, processes, and customer journeys.

Your Tasks

Design, develop, and maintain scalable backend solutions for the Business Banking Cards domain
Build modern applications using Java 21+, Spring, Spring Boot, Kafka, and Oracle Database
Take ownership of system design and implementation, considering the overall IT landscape, dependencies, integration points, and long-term maintainability
Work with microservice-based and private cloud architectures
Take end-to-end responsibility across the software development lifecycle, from analysis and solution design to implementation, testing, documentation, deployment, and production support
Collaborate closely with business stakeholders, IT teams, architects, product owners, external service providers, and Retail Banking teams
Design and implement synchronous and asynchronous integrations, including REST-based APIs and Kafka-based event communication
Apply test-driven development and contribute to automated functional, integration, regression, and performance testing
Apply secure software development practices and ensure that solutions meet banking, governance, and security requirements
Identify and address security risks during design, implementation, testing, and production support
Contribute to CI/CD pipelines, build processes, deployment automation, and continuous improvement of delivery workflows
Support software quality through clean code, code reviews, quality assurance measures, and engineering best practices
Analyze incidents and problems, identify root causes, and implement sustainable technical solutions
Mentor less experienced engineers and actively share knowledge within the team

Your Profile

Degree in computer science, engineering, business informatics, economics, or a comparable qualification
Several years of professional experience in Java backend development, ideally in enterprise or regulated environments
Strong hands-on experience with Java 21 or newer
Strong knowledge of Spring and Spring Boot
Experience with Kafka and event-driven or asynchronous communication patterns
Experience with Oracle Database, including data modeling, SQL, and performance-aware development
Good understanding of microservices, distributed systems, and cloud-ready application design
Ability to take ownership of technical solutions from design to production
Strong awareness of the broader application landscape, including upstream and downstream systems, dependencies, interfaces, and operational impact
Good understanding of secure software development practices, including authentication, authorization, data protection, dependency management, and secure coding principles
Awareness of cybersecurity risks in software development, especially in banking or other regulated environments
Confident with build tools, version control, CI/CD processes, and automated deployment pipelines, ideally in an Azure or private cloud environment
Hands-on experience with test automation and quality engineering practices
Experience working in agile teams, for example using Scrum or Kanban
Structured, solution-oriented, and quality-focused working style
Strong communication skills and a collaborative mindset
Willingness to challenge existing solutions constructively and continuously improve the technical landscape
Good written and spoken English skills

We offer many benefits

Company pension plan, capital-building offers, free Deutschlandticket, 13 bank holidays & 30 days of vacation per year
Remote working in line with the company, regulatory and legal requirements; individualized work schedule models, sabbatical, subsidization of nursing & childcare costs
Personal budget for continuing education and development as well as health; plus, a personal budget to set up your home office

Ready for a new job?

At ING we are colorful and diverse: different personalities with different perspectives - an international culture where we value and appreciate each other. We believe in substance over style, people instead of labels.

This describes you to a T?

Simply apply online - your resume is all we need to get to know you, a cover letter is optional!

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ING Recruitment team

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ING’s vision is to unlock our people’s full potential through our inclusive culture where everyone has the opportunity to develop and have impact for our customers and society. To achieve this vision, our policies support diversity, equity, and inclusion. As an equal opportunity employer, we do not tolerate discrimination of any kind with regard to age, gender, gender identity, cultural background, experience, religion, race, ethnicity, disability, family responsibilities, sexual orientation, social origin, or any other status protected by applicable law. If you require any assistance or if we can accommodate you in any way when participating in our application and/or interview process, please email the recruiting contact listed for the relevant position. We will be happy to work with you to ensure a fair and accessible process. Read more about our commitment to diversity, inclusion and belonging here.