Senior Java Developer (H/U/M/A/N) - full-time Software Development

Freshcells systems engineering GmbH is a software service provider based in Düsseldorf with a dynamic team of over 50 creative experts from various fields.

We focus on authenticity, individual talent development and open communication . We build on respect, trust and responsibility . As an innovation-driven company , we invest in new ideas . We know that the best results come from teamwork . We make mistakes , but we learn from them. We are open and courageous for new ways .

Join us on our exciting journey in probably the most important and forward-looking area – software development – as a Senior Java Developer (H/U/M/A/N).

• Flexible remote-work days
• Flex-time for early risers and night owls
• Subsidy for Urban Sports Club membership
• Special offers on travel, technology and more
• A secure and long-term job
• Room for own ideas and personal development
• Digital training courses for every employee at their free disposal
• Support with relocating processes, as well as free German courses for newcomers
• Shared activities such as summer and winter parties, monthly Company Breakfast, etc.
• A dog-friendly working environment

Tasks

• Design and improve our high-performance Java web applications with industry-standard frameworks
• Conceptual design and implementation of new features for sophisticated software solutions in cooperation with the project management, design, and development teams
• Writing automated software tests and setup deployments for web applications
• Profiling and discovering performance bottlenecks in our Java applications

Requirements

• Several years of hands‑on experience in Software Engineering
• Strong experience with Java, including versions 11 and 17
• Experience with the Spring (Boot) framework
• Ability to write and optimize SQL queries
• Experience in Software Integration Development (SOAP/REST)
• You are comfortable with microservices architectures, API‑based and event‑based communication
• Experience with build and dependency management tools such as Maven and Gradle
• Familiarity with reactive programming principles and hands‑on experience using Project Reactor
• Experience in agile development in a team and an organized and result‑oriented work ethic for sustainable and scalable web systems
• Good knowledge of how to design distributed systems
• Good knowledge of the English language

Nice to Have

If you are interested in a broad portfolio of projects, want to develop yourself continuously and like to work independently and responsibly, then apply to join us: We are looking forward to meeting you!