Summary: Develop scalable backend systems and powerful APIs for modern digital platforms, collaborating with German corporate clients and global B2B market leaders. Highlights: 1. Develop and maintain backend services using Java and Spring Boot 2. Implement and evolve REST and GraphQL APIs for web applications 3. Support building microservice-based architectures in agile environments **Do you want to build scalable backend systems and develop powerful APIs for modern digital platforms? Then you’re the perfect fit for our team – working with German corporate clients and global B2B market leaders!** **What we offer.** * The chance to become part of a large, international agency group: approx. 350 great employees in Germany, a modern, customer\-centric business model and a true New Work environment. As part of MSQ with a further 1500 colleagues, we offer an international perspective with offices and sister agencies in the UK, USA and Asia * Flexible working environment: Hybrid or in one of our beautiful offices in Mainz, Ludwigsburg or Barcelona * Agile organization: Self\-organized teams, extensive onboarding, personal buddy and lots of support from experienced colleagues * Work \& life balance: job bike leasing, Smart'n'fit weeks, fitness and self\-care offers via EGYM Wellpass * And of course: modern hardware, well\-equipped tool landscape, company pension scheme, further training budget, in\-house training, company events, drinks flat rate and good coffee **What you do.** * Development and maintenance of backend services using **Java and Spring Boot** * Implementation and further development of **REST and GraphQL APIs** for modern web applications * Support in building **microservice\-based architectures** * Integration of databases and external systems * Close collaboration with frontend developers, UX/UI designers and project management in **agile environments (Scrum/Kanban)** * Writing clean, maintainable and well\-documented code * Supporting testing, debugging and optimization of backend services **What you bring along.** * **1–3 years of professional experience** in backend development with **Java** (or strong project experience) * Basic knowledge of **Spring Boot and API development (REST or GraphQL)** * Interest in **microservices and modern backend architectures** * Understanding of **clean code principles and software development best practices** * Familiarity with **Git and modern development workflows** * Motivation to learn, grow and take ownership in a collaborative team * Good written and spoken **German or English skills**