Senior Backend Developer (Java/Kotlin) with Frontend knowledge

ING; Katowice; On-site; PLN 212,000 - 298,000; Full time

Job summary

A financial services organization is hiring for an Engineering role in Katowice, Poland. Candidates should have strong Java or Kotlin experience, familiarity with Spring Boot, and an understanding of agile methodologies. The position entails developing backend services and collaborating closely with frontend teams. This role offers the chance to work in a dynamic, international environment focused on innovation and teamwork.

Qualifications

• Strong experience in Java and/or Kotlin.
• Familiar with Spring Boot and object-oriented design.
• Understand relational databases, MS-SQL is a plus.

Responsibilities

• Develop and maintain backend services for the Gaia web application.
• Design APIs and microservices using Java/Kotlin and Spring Boot.
• Collaborate with frontend developers for integration.

Skills

Java

Kotlin

Spring Boot

CI/CD pipelines

Agile methodologies

Frontend technologies

Tools

Azure DevOps

Kubernetes

Job description

ING Hubs Poland is hiring!

We are looking for you if:

• You have strong experience in Java and/or Kotlin.
• You’re familiar with Spring Boot and object-oriented design.
• You understand relational databases (MS-SQL is a plus).
• You have experience with CI/CD pipelines (e.g., Azure DevOps).
• You’re comfortable working in agile teams and DevOps environments.
• You have basic knowledge of frontend technologies like React or WebComponents.

You'll get extra points for:

• Experience with Kubernetes and cloud-native deployments.
• Familiarity with frontend testing tools (e.g., Cypress, Vitest).
• Understanding of UI/UX principles.
• Exposure to frontend frameworks and willingness to collaborate on UI integration.
• Experience with containerization and DTAP environments.

Your responsibilities:

• Develop and maintain backend services for the Gaia web application.
• Design APIs and microservices using Java/Kotlin and Spring Boot.
• Collaborate with frontend developers to ensure smooth integration.
• Participate in agile ceremonies and DevOps practices.
• Contribute to service design, strategy, and availability.

Information about the squad:

Work in a large international team, in cooperation with many units of the ING Group. At ING Hubs Poland, we operate in accordance with the Agile approach, based on agile methodologies such as Scrum and Kanban. We are an innovative organization that bases its activities on trust in the people we work with. Thanks to the great freedom of action, we stimulate motivation and creativity, which speeds up work and allows us to flexibly adapt to the changing expectations of our business partners. The basis of our organization are small units called squads, which have a clear vision of their product, independently overcome emerging challenges and together develop the most flexible and effective ways of operating.

The role naming convention in the global ING job architecture will be “Engineer IV”.