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# Senior Backend Developer (All Genders)

- **Company:** United Digital Group
- **Location:** Madrid, 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, Delivery Pipeline, Spring-boot, Backend, Git, Graphql, Front End Software Development, Restful APIs, Software Version Control, Microservices
- **Published:** August 5, 2026
- **Apply:** https://www.buscojobs.com.es/senior-backend-developer-all-genders-en-madrid-ID-365484636

## 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
#J-*****-Ljbffr

## 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 usingJava and Spring BootBuilding and maintainingREST and GraphQL APIsfor modern web applications and digital platformsDesigning and implementingmicroservice architectureswith 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 inagile environments (Scrum/Kanban)Continuous improvement of code quality, architecture and development processesWhat you bring along5+ years of professional experienceas a backend developer withJava and Spring BootStrong experience in designing and developingRESTful and/or GraphQL APIsHands?on experience withmicroservice architecturesand distributed systemsGood understanding ofsoftware architecture, clean code principles and backend design patternsExperience withCI/CD pipelines, version control (Git) and modern development workflowsStrong problem?solving skills, ownership mindset and team?oriented working styleVery good written and spokenGerman or English skills#J-*****-Ljbffr


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