Senior Backend Developer (all genders)

Do you want to design scalable backend systems and build powerful APIs that drive modern digital platforms? Then you’re the perfect fit for our team – working with German corporate clients and global B2B market leaders!

• 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

• Design and development of scalable backend systems and services using Java and Spring Boot
• Building and maintaining REST and GraphQL APIs for modern web applications and digital platforms
• Designing and implementing microservice architectures with a focus on scalability, resilience and maintainability
• Integration of external systems, databases and third-party services
• Ensuring high performance, security and reliability of backend services
• Close collaboration with frontend developers, DevOps, UX/UI design and project management in agile environments (Scrum/Kanban)
• Continuous improvement of code quality, architecture and development processes

• 5+ years of professional experience as a backend developer with Java and Spring Boot
• Strong experience in designing and developing RESTful and/or GraphQL APIs
• Hands-on experience with microservice architectures and distributed systems
• Good understanding of software architecture, clean code principles and backend design patterns
• Experience with CI/CD pipelines, version control (Git) and modern development workflows
• Strong problem-solving skills, ownership mindset and team-oriented working style
• Very good written and spoken German or English skills