Java Developer (all genders)

Stellenbezeichnung: Java Developer (all genders)

Firma: E-Star Trading GmbH

Arbeitsort / Location: Karlsruhe, Baden-Württemberg

Job Beschreibung: e*star provides trading solutions for the European energy markets and has more than 15 years of experience in this field. The European energy sector is currently undergoing a historic transformation due to the energy transition and digitalization. As experts in this field, e*star is working on shaping and developing the European energy market of the future – together with our customers.


  • Support the development of our energy trading solutions in different areas like our trading screens and back-end services (built with Java 17 and ReactJS), integration of exchange and broker systems, leveraging public and private cloud services
  • Help us further optimizing our applications for our small and large customers
  • Work as part of our team using agile methodologies
  • Work on software design, code reviews, unit tests and documentation
  • Research and prototype new products and technologies
  • Deepen the knowledge you have acquired and become an active member of our team
  • Contribute to the continuous improvement of our development and continuous delivery processes


  • A suitable work permit
  • A degree in the field of (business) information technology or comparable courses of study or trainings
  • A passion for software development and a strong focus on the quality of the results
  • Practical experience developing software with Java and corresponding tools
  • Curiosity to work in the field of energy trading where low-latency requirements and highly scalable distributed systems are of great importance
  • Very good knowledge of English – comparable to English level B2 or higher
  • Knowledge of German is advantageous
  • Willingness to take over responsibility in the team later in your career


  • Enjoy a professional environment within a relaxed, friendly corporate culture
  • Mobile working? Night owl or early bird? A classic consultant lifestyle with 5 days on site is not for you? With us you will find enough space for an optimal work-life balance
  • Stay healthy – our company supports you with a fixed health budget for individual services

We are a home for tech enthusiasts and doers. Origin, age, preferences – it doesn’t matter to us. What counts is that we burn for the common cause. We are already looking forward to getting to know you!

E-Star Trading GmbH

estar offers a full range of energy trading software as a service solutions to answer the individual needs of all companies trading in European Energy Markets. estar enables companies to trade directly with all market participants and increases reach and liquidity to maximize trading success.

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