Location:Dublin, Ireland (Hybrid Model)Experience:Mid-level (4–6 years) | Senior-level (7+ years)Role OverviewWe are seekingexperienced Java Developers (Mid Senior levels)to join a high-profileIrish public sector programmebased inDublin. The successful candidates will work onlarge-scale, mission-critical systemssupporting national services.Mandatory RequirementCandidatesmust have prior experience working with the Revenue Commissioners of Ireland(directly or via an approved vendor/consultancy).This is ahybrid role, requiring onsite presence in Dublin as per programme needs.Key ResponsibilitiesDesign, develop, and maintain enterprise-grade Java applicationswithin a large public-sector environmentContribute to the full Software Development Life Cycle (SDLC)including requirements analysis, development, testing, and deploymentWork on high-volume, high-availability systemsused at national scaleCollaborate closely with architects, business analysts, testers, and DevOps teamsEnsure solutions comply with Revenue, Government, and security standardsPerform code reviews and promote best practices in code quality, performance, and securitySupport production issues, defect resolution, and continuous system improvementsMentor junior developers (Senior role)Mandatory Skills ExperienceStrong hands-on experience with Java (Java 8 or above)Proven previous experience working with Revenue Commissioners Ireland (non-negotiable)Solid experience with:Spring / Spring BootRESTful Web ServicesHibernate / JPASQL relational databases (Oracle / PostgreSQL / SQL Server)Experience working in Agile and/or Waterfall environmentsStrong understanding of secure coding standardsand enterprise application designExcellent communication skills and experience working with government stakeholdersDesirable / Nice-to-Have SkillsExperience in Irish Government or Public Sector projectsbeyond RevenueExposure to:Microservices architectureCI/CD pipelines (Jenkins, Git, Maven/Gradle)Messaging systems (JMS, Kafka, MQ)Knowledge of:OAuth2, SAML, or enterprise authentication mechanismsDocker / KubernetesExperience with performance tuning and system optimisationEducation CertificationsBachelor's Degree in Computer Science, Engineering, or related disciplineRelevant Java or Cloud certifications (Oracle, Spring, AWS, Azure) are advantageous