Backend Developer (Java / Spring Boot / Aws) - Spain (Hybrid/Remote)

Backend Developer (Java / Spring Boot / AWS) - Assisted ChannelsSpain | Hybrid in Madrid, Barcelona, Málaga or Logroño | Remote in the rest of the countryFull-timeAbout The RoleWe are looking for experienced Backend Developers specialized in Java and Spring Boot, with strong expertise in microservices architectures and cloud-native development in AWS environments. You will join an international digital transformation project focused on building scalable backend services, event-driven architectures, and modern API ecosystems within a high-availability environment.This role combines backend engineering, cloud-native development, integrations, and modern architectural practices.What you’ll doDesign and develop scalable microservices using Java and Spring BootDefine and implement RESTful APIs ensuring performance, scalability, and securityApply clean architecture principles, including hexagonal architecture (ports & adapters)Develop and maintain persistence layers using Postgre SQL and JPA/HibernateBuild and maintain serverless components using AWS LambdaContribute to event-driven architectures using AWS services such as SQS and Event BridgeIntegrate internal and external systems, including CRM platforms via ODataWrite and maintain unit and integration testsCollaborate with Dev Ops and cloud teams in AWS environmentsFollow best practices in CI/CD, version control, and code qualityWhat we’re looking for+3 years of professional experience in backend developmentStrong hands-on experience with:JavaSpring BootMicroservices architecturesExperience designing and implementing:REST APIsAPI versioning and documentationStrong knowledge of:Postgre SQLJPA / HibernateExperience with:JUnitMockitounit and integration testingExperience working in AWS environments and cloud-native architecturesUnderstanding of clean architecture principles and separation of concernsSpanish fluent/native levelEnglish B2 (spoken and written) – requiredHighly valuedExperience with:AWS LambdaEvent-driven architecturesAmazon SQSAmazon Event BridgeKafka or similar technologiesExperience integrating with:Microsoft DynamicsOData protocolsKnowledge of:Hexagonal ArchitectureDomain-Driven Design (DDD) principlesWork modelHybrid model available in:MadridBarcelonaMálagaLogroñoRemote from other locations within SpainNoteWe are looking for backend-focused engineers with strong experience building modern Java microservices and cloud-native systems. This is a highly technical and hands‑on role within a collaborative engineering environment.