Senior Fullstack Developer – Java / Android | D5 Cologne Area | 80% remote | MMA15173

Responsibilities

• Development of a solution for determining price information and creating PDF documents
• Development and further development of Java backend applications and mobile Android applications
• Conception and implementation of APIs and interfaces
• Processing of complex data structures and integration of relational databases
• Development of event-driven architectures with Apache Kafka
• Implementation of authentication and authorization concepts (OAuth2)
• Participation in agile development teams

Requirements

Due to customer requirements, a project-related employment is assumed.

Do you have time and interest in an exciting project?

Then we look forward to hearing from you!

Contact:

Michelle Maggio

Expert Candidate Relations

• Sound knowledge of Java 17+, Spring Boot 3+, Spring Batch and JPA/Hibernate
• Experience in Android development with Kotlin and Jetpack Compose
• Very good knowledge of PostgreSQL, API design and complex data structures
• Knowledge of OAuth2 and event-driven architectures
• Confident use of Git, Maven, Gradle and IntelliJ
• Knowledge of Angular, Docker, Kubernetes and GitLab CI is an advantage
• Experience with AI development tools such as GitHub Copilot or Claude Code is desirable
• Independent way of working, quick comprehension and agile mindset
• Very good German and good English skills
• Willingness to travel to Vienna

Project details

November 2026

12 months

D5 Cologne / 80% remote

Project ID: 15173

Application Deadline: 06.11.2026

Dear Network,

For our client in the Cologne area, we are looking for a Senior Fullstack Developer – Java / Android.

https://www.constaff.com/projektbeschreibung/?positionID=15173

• Start: 2026-11
• Duration: 12 Monate
• Remote: hybrid
• Location: Köln, Deutschland, DE
• Languages: German