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 general 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




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
What you bring along
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 under

📌 Senior Backend Developer (Barcelona)
🏢 United Digital Group
📍 Barcelona