Senior Full-Stack Engineer (all genders) | Backend or Frontend Focus

Anstellungsdetails Permanent Contract, Full-or Part-Time, Remote or Cologne / Düsseldorf / Darmstadt / Berlin Info Who we areWe are the tech powerhouse behind Kaufland’s international online marketplaces and a company within the Schwarz Group. Driven by a start-up mentality and working on an equal footing within flat hierarchies, we develop the best marketplace solutions for our customers, sellers and partners. #FromEuropeForEurope Day by day, our Tech & Product Team of about 400 experts pursues the goal of creating the best possible customer shopping experience for our online marketplace. Through innovative technical developments, they not only create an outstanding shopping experience but also lay the foundation for an optimal selling experience for our sellers. Learn more about our division, areas, and cross-functional teams here ! Aufgaben Your tasks – this is what awaits you in detail You handle complex technical dependencies independently to ensure smooth integration and minimal conflicts across our entire system landscape You drive performance optimization continuously by identifying and addressing bottlenecks across our entire application landscape You develop and maintain complex web applications autonomously using our core technologies, PHP, Vue.js and Node.js You manage system monitoring, including the integration of tools like Datadog, to ensure the high performance and reliability of our systems You design, develop, and deploy scalable, maintainable, and efficient microservices to support our long-term architecture You provide expert technical guidance and mentorship to cross-functional teams, acting as a key consultant within your area of expertise Profil Your profile – this is what we expect from you You possess strong hands-on expertise in Vue.js and TypeScript (Frontend track) AND/OR modern PHP (Backend track, preferably Symfony), with comfortable full-stack awareness across both sides You demonstrate operational excellence through your knowledge of modern testing, debugging, monitoring, and deployment techniques You use your adaptive technical thinking to build responsive applications across various API paradigms while maintaining a solid understanding of infrastructure You are a proactive communicator who takes ownership, challenges inefficient processes, and thrives in an international environment You are fluent in English (C1) and enjoy working in an international environment Benefits What we offer Create your own work-life balance: You have the flexibility to choose between working remotely (within Germany) or from one of our locations in Cologne, Darmstadt, Düsseldorf, or in Berlin! Urban Sports Club and RSG Group Fitness Studios : Get top deals for fitness, swimming, yoga and more Mental Well-Being: We support you on your well-being journey with special offerings such as Instahelp, the digital platform for online psychological counseling Vacation & Sabbatical: Enjoy 30 days of vacation per year and the opportunity