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# Senior Backend Developer (All Genders)

- **Company:** United Digital Group
- **Location:** Barcelona, Spain
- **Contract:** Permanent contract
- **Skills:** Clean Code Principles, Java (Programming Language), Application Programming Interfaces (APIs), Software Quality, Databases, Software Design Patterns, DevOps, Distributed Systems, Scrum Methodology, Software Architecture, Web Applications, Web Platforms, Spring-boot, Backend, Git, Graphql, Front End Software Development, Restful APIs, Software Version Control, Microservices
- **Published:** September 14, 2026
- **Apply:** https://www.buscojobs.com.es/senior-backend-developer-all-genders-en-barcelona-ID-371771366

## About the Role

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

## Description

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!What we offerThe 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 **** colleagues, we offer an international perspective with offices and sister agencies in the UK, USA and AsiaFlexible working environment: Hybrid or in one of our beautiful offices in Mainz, Ludwigsburg or BarcelonaAgile organization: Self?organized teams, extensive onboarding, personal buddy and lots of support from experienced colleaguesWork & life balance: job bike leasing, Smart'n'fit weeks, fitness and self?care offers via EGYM WellpassAnd of course: modern hardware, well?equipped tool landscape, company pension scheme, further training budget, in?house training, company events, drinks flat rate and good coffeeWhat you doDesign and development of scalable backend systems and services using Java and Spring BootBuilding and maintaining REST and GraphQL APIs for modern web applications and digital platformsDesigning and implementing microservice architectures with a focus on scalability, resilience and maintainabilityIntegration of external systems, databases and third?party servicesEnsuring high performance, security and reliability of backend servicesClose collaboration with frontend developers, DevOps, UX/UI design and project management in agile environments (Scrum/Kanban)Continuous improvement of code quality, architecture and development processesWhat you bring along5+ years of professional experience as a backend developer with Java and Spring BootStrong experience in designing and developing RESTful and/or GraphQL APIsHands?on experience with microservice architectures and distributed systemsGood understanding of software architecture, clean code principles and backend design patternsExperience with CI/CD pipelines, version control (Git) and modern development workflowsStrong problem?solving skills, ownership mindset and team?oriented working styleVery good written and spoken German or English skills


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