Backend Developer - FlexHub Team (m/f/d)

Commerzbank AG – Poland; Łódź; Hybrid; PLN 100.000 - 140.000; Vollzeit

Benefits dieser Stelle

Development Plans

Life insurance

flexible working hours

integration events

Zusammenfassung

Commerzbank AG is seeking a Professional Backend Developer for its flexhub in Łódź. You will build robust Java/Spring-based services, design backend components, and ensure reliable banking platform performance.

Join a team that focuses on engineering solutions without sales pressure, participates in sprints, and collaborates across bank units. Fluency in English and Polish (B2) is required, with hybrid work arranged at Ogrodowa 8, Łódź.

Qualifikationen

• Experience with Java and Spring in backend development.
• Ability to design robust backend solutions and services.
• Familiarity with RESTful services and SQL databases.
• Proficient in version control with Git and writing tests.
• Comfort with Agile practices and collaborative teamwork.
• Strong problem-solving and technical documentation skills.
• Fluent English and Polish (minimum B2 level).

Aufgaben

• Design and implement complex backend logic using Java and the Spring ecosystem.
• Integrate third-party services and internal systems via secure REST or messaging.
• Translate business requirements into high-performance code.
• Write tests and perform code reviews to ensure quality.
• Contribute to sprint planning and task estimation with the team.
• Deploy services to production and troubleshoot incidents.
• Create architecture diagrams and technical specs for components.
• Stay updated on Java developments and share findings with peers.
• Explain technical challenges to product owners in clear terms.
• Refactor legacy code to improve performance and maintainability.

Kenntnisse

Java

Spring Framework

RESTful Web Services

SQL

Git

Object-oriented Design

Unit Testing

Agile Methodologies

Problem Solving

Technical Documentation

English

Polish

Tools

Git

SQL

Jobbeschreibung

What is flexhub?

We are Commerzbank's internal delivery capability – a team of engineers, architects, analysts and experts working directly with business units. Unlike external consultancies, we are colleagues who stay. Based in Frankfurt, Sofia, and Łódź, we drive high-priority initiatives while building internal expertise that lasts.

What's in it for you:

Consulting variety meets corporate stability. You join different teams across the bank when your expertise is needed, then move on to the next challenge. This approach helps you build strong internal know-how and gives you the chance to contribute to meaningful work – one initiative at a time – without sales targets or utilization pressure. No selling. Just a consistent focus on engineering solutions that matter.

As a Professional Backend Developer at flexhub, you engineer robust solutions that serve our customers reliably. You take ownership of specific components, designing and implementing Java-based services with minimal supervision. Your work directly impacts the stability and speed of our banking platform. By solving technical problems independently, you help the team meet its delivery goals sprint after sprint.

Your main tasks are:

• Primary Action: Design and implement complex backend logic using Java and the Spring ecosystem.
• Integration: Integrate third-party services and internal systems using secure REST or messaging protocols.
• Implementation: Translate business requirements into functional, high-performance code.
• Quality: Write comprehensive tests and conduct thorough code reviews to maintain high standards.
• Collaboration: Actively contribute to sprint refinement and estimate technical tasks with the team.
• Operations: Deploy your services to production and troubleshoot incidents when they occur.
• Documentation: Create detailed technical specifications and architecture diagrams for your components.
• Learning: Keep up with Java updates and share interesting findings with your peers.
• Stakeholder: Explain technical challenges to product owners in understandable language.
• Improvement: Refactor legacy code to improve performance and maintainability.

What is important for us?

• Java
• Spring Framework
• RESTful Web Services
• SQL
• Git
• Object-oriented Design
• Unit Testing
• Agile Methodologies
• Problem Solving
• Technical Documentation
• Fluency in English and Polish at a minimum B2 level

How?

Hybrid on Ogrodowa 8 Łódź

What we offer?

Of course, we offer Development Plans for employees, Life insurance, flexible working hours, integration events and much more