Deine Aufgaben 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 Dein Profil 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) Warum wir? freshcells systems engineering GmbH is a software service provider based in Düsseldorf with a dynamic team of over 40 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 are achieved as a team. We make mistakes, but we l earn from them. We are open and courageous for new ways. Join us on our exciting journey in what is probably the most important and forward-looking area - software development - as a Senior Java Developer (m/f/d) full-time Our offer to you: Flex time for early risers and night owls Flexible home office days Company pension scheme with employer contribution Subsidy for the "Deutschlandticket" Advantage portal with offers in online stores and branches of various brands High-end equipment for private use too A secure and long-term workplace Regular feedback, team meetings & retrospectives Room for your own ideas and personal development Digital training courses, freely available to every employee Support with relocating processes, as well as free German courses for newcomers Joint activities such as summer and winter parties, monthly company breakfast, etc. A dog-friendly working environment All people are welcome here, regardless of gender, age, sexual identity, origin, religion, ideology, with or without a disability. The main thing is that you fit in with us. If you are interested in a wide-ranging portfolio of projects, want to continuously develop yourself and enjoy working independently and responsibly, get in touch with us: recruitingfreshcells.de. We look forward to hearing from you Über uns Was erwartet Dich bei freshcells? Die freshcells systems engineering GmbH ist eine in Düsseldorf ansässige Softwareagentur mit einem Team von mehr als 40 Mitarbeitern. Wir bieten innovative Technologie-Beratung, erstellen Software-Konzepte sowie -Strategien und entwickeln moderne und zukunftsträchtige Applikationen und Systeme für etablierte Unternehmen, Start-Ups und eigene Produkte.