Senior Java Developer

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Senior Java Developer (m/w/d) - Software Development in full time

freshcells systems engineering GmbH is a software company based in Düsseldorf, Germany with a dynamic team of over 40 employees.

We are not a hire-and-fire company; we prefer to quench our thirst with a cold drink after work.

Positions we are seeking to fill include a Senior Java Developer (full-time software development) to support our team in Dusseldorf.

You will strengthen our team of Java developers to help improve, extend and maintain our Java software services. You will participate in a project with disruptive potential for an entire industry.

Please send us your application via email to

The freshcells spirit

  • Thinking along and thinking ahead: see the bigger picture.
  • Move something and we move with you.
  • See what needs to be done and do it.
  • Achieve and celebrate successes.
  • Keep the motivation and love for challenges.
  • Help Team-Mates and they will help you, too.
  • Communicate, be the team
  • Gaming is great. Blame-game and finger-pointing is not.
  • There is a life besides work.

What we have to offer

  • Room for your own ideas
  • Varied and exciting IT projects
  • Flat hierarchies and a friendly team
  • An agile, structured, and relaxed working atmosphere
  • Free water, coffee, and tea
  • Monthly company breakfast
  • Summer event
  • Christmas event
  • Company pension plan
  • Subsidized sports courses
  • Dogs welcome
  • Very good access to public transportation
  • An international work environment
  • Home office options
  • Flexible hours
  • Support during relocation (administrative formalities, apartment search, registration with authorities, health insurance, bank account, etc.)

Your Responsibilities

  • 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

Your Qualifications

  • Several years of hands-on experience in Software Engineering
  • Solid knowledge of Java (8, 11) and object-oriented software architectures
  • Experience with the Spring (Boot) framework
  • Experience in SQL
  • Experience in Software Integration Development (SOAP/REST)
  • You are comfortable with microservices architectures, API-based and event-based communication.
  • Using build tools (like maven, gradle)
  • 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, regardless of your mother tongue

Nice to have

  • Experience in NoSQL
  • Previous experience with lucene/solr/elasticsearch
  • Experience with Docker and ideally, experience Kubernetes and Helm
  • Experience with Apache Ignite and Redis
  • Continuous Integration and Deployment with Jenkins (or others)
  • Experience with GraphQL is a plus
  • Experience with Reactive programming (Spring WebFlux)

Take the initiative

Please note

Applications sent by post cannot be taken into account during the application process. For this reason, application portfolios will also not be returned.