Senior Software Engineer (m/f/d) Java/Fullstack

As a Senior Software Engineer with a focus on Java, you join our development team for our product “Swing” and play a key role in evolving and stabilizing a business-critical, established system.
“Swing” combines mature on-premise components with modern integrations and forward-looking roadmap initiatives. In this role, you work hands-on on Java-based backend components, drive technical improvements, and ensure long-term stability, performance, and maintainability.
You move confidently between maintaining existing systems and shaping future developments, contributing your expertise to improve architecture, code quality, and engineering practices.

Your Responsibilities:

• You develop and maintain Java-based backend components within the “Swing” product.
• You work on integrations and interfaces within a mature software ecosystem.
• You analyze existing structures and drive refactoring and modernization efforts.
• You design robust, scalable solutions with performance and stability in mind.
• You collaborate closely with product management, support, and adjacent teams.
• You actively use modern development tools – including AI-assisted tools – and critically evaluate their outputs.
• You ensure high code quality through testing, reviews, and clear standards.
• You contribute to improving architecture and engineering practices.