> Markdown version of [/jobs/ext/2302256-senior-java-backend-engineer-omnichannel-commerce](https://www.wearedevelopers.com/jobs/ext/2302256-senior-java-backend-engineer-omnichannel-commerce). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Java Backend Engineer - Omnichannel Commerce - **Company:** Solicitante De Empleo - **Location:** Donostia / San Sebastián, Spain - **Contract:** Permanent contract - **Skills:** Java (Programming Language), Application Programming Interfaces (APIs), Agile Methodology, Amazon Web Services, Confluence, JIRA, Automation of Tests, Cloud Computing, Software Quality, Databases, Continuous Integration, Software Debugging, DevOps, Payment Systems, Hibernate (Java), Identity and Access Management, IntelliJ IDEA, Java Persistence API, JSON, Apache Maven, Microsoft Message Queuing, MongoDB, MySQL, OAuth, OpenID, Scrum Methodology, Swagger, Software Engineering, SonarQube, Systems Integration, Strategies of Testing, Extensible Markup Language (XML), Openapi, Datadog, Okta, Spring Cloud, Spring-boot, Backend, Gitlab, Git, Event Driven Architecture, Kubernetes, Information Technology, Atlassian Tools, Integration Frameworks, Graphql, Restful APIs, Software Version Control, Api Management, Docker, Microservices - **Published:** August 30, 2026 - **Apply:** https://www.recruit.net/job/java-backend-engineer-omnichannel-commerce-jobs/4F5C1E22DF9A1562 ## About the Role Technical Skills 5+ years of experience as a Java Software Engineer, with strong expertise in Java 21 and the Spring ecosystem (Spring Boot, Spring Data JPA, Hibernate, Spring Cloud). Proven experience developing microservices-based solutions using event-driven architectures and API first principles. Experience working with Order Management Systems (OMS), Fluent Commerce, supporting order orchestration and omni-retail processes. Strong experience designing and implementing RESTful APIs (OpenAPI/Swagger) and working with JSON, XML, and GraphQL. Experience building omni-retail and e-commerce solutions, including order lifecycle, inventory visibility, fulfilment, returns, payment flows. Proficiency with databases such as MySQL, and MongoDB. Hands-on experience with containerized and cloud-native environments, including Docker, Kubernetes, and CI/CD pipelines (GitLab). Experience working with event messaging systems and integration patterns (e.g., AWS SQS, Solace, Pub/Sub architectures). Familiarity with security best practices including OAuth2, OIDC, and IAM solutions such as Keycloak and Okta Experience with modern development and testing tooling, including IntelliJ, SonarQube, Datadog, Insomnia, and the Atlassian suite (Jira, Confluence). DevOps & Tooling Build & IDE: IntelliJ, Maven Version Control: Git, GitLab Code Quality & Security: SonarQube, Snyk API Testing & Integration Tools: Insomnia, RobotFramework Collaboration & Documentation: Atlassian Suite (Jira, Confluence) Cloud technologies/platform: AWS, K8s, Docker, Helm Soft Skills Strong problem solving and analytical skills. Excellent communication and ability to work with multinational, cross-functional teams. Proactive, self-driven, and eager to learn new technologies. Ability to work independently in a fast-paced Agile environment. Education & Language Bachelor's or master's degree in computer science, Software Engineering, or a related field. Fluency in English (French or other languages is a plus). ## Description Analyse business and technical requirements to design and develop robust backend solutions supporting omni-channel retail and order management processes. Develop, test, debug, and deploy Java-based microservices, ensuring scalability, reliability, and performance. Design and implement integrations with Order Management Systems and retail platforms, supporting key flows such as order orchestration, inventory visibility, fulfilment, returns, and payment flows. Maintain and improve existing services, ensuring high code quality, maintainability, and reliability. Troubleshoot and resolve software defects, integration issues, and performance bottlenecks. Collaborate with the Support team to investigate and resolve production incidents related to omni-retail and order management services. Work with the DevOps team to implement and improve CI/CD pipelines, automation, and deployment processes. Review functional specifications and translate them into scalable and maintainable technical solutions. Collaborate with QA Engineers to support testing strategies and contribute to automated testing. Contribute to the continuous improvement of the Product/Solution by recommending technical enhancements and optimizations. Participate actively in Agile ceremonies (daily stand-ups, sprint planning, sprint reviews, retrospectives).