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Get AI-powered advice on this job and more exclusive features. Direct message the job poster from SR2 | Socially Responsible Recruitment | Certified B Corporation Client Partner | Scaling SC, NPPV, DV and UKIC Cleared DDaT Teams Across the Public SectorSenior Java Developer| Legacy Modernisation | AWS | Architecture | Outside IR35 Java | CI/CD | Monolith Refactoring | Technical Roadmapping | Cloud MigrationSR2 is supporting a high-profile discovery project focused on assessing and modernising three legacy digital services for a public sector client. We're looking for aSenior Java Developer with a growing focus onsolution architecture— someone who can stay hands-on with the code while also shaping strategy and long-term technical direction. The engagement will start with a technical discovery and assessment phase, focused on understanding the current state and recommending a future path torefactor and migrate to cloud .Key Responsibilities: Lead technical analysis of legacy services — codebases, architecture, CI/CD, infrastructure Identify risks, constraints, and opportunities for modernisation and cloud readiness Provide architectural input to roadmap and cloud migration strategy Stay hands-on with code where needed — support service refactoring and prototyping Work with delivery leads to shape a practical next-phase delivery plan Tech Environment: Java , Git, Jenkins, AWS Mix of legacy service components with varying CI/CD and infra maturity Potential travel to client site in theNorth East(occasional, not full-time) Ideal Experience: StrongJava engineering background , with experience across legacy and modern stacks Recent experience working in atechnical/solution architecturerole Familiar with legacy patterns — monoliths, outdated libraries, unsupported databases Experience planning and deliveringrefactoringandcloud migrationprojects Excellent communication and stakeholder engagement skills Comfortable working in early-phase discovery and shaping phases The Details: Outside IR35 Day rate: £450-£475 6 months Mainly remote, very occasional on-site (monthly) in the North East Start: ASAP If you're a senior technologist who enjoys untangling legacy, designing for the cloud, and staying hands-on with modern Java — apply now for immediate consideration. Seniority levelSeniority level Not Applicable Employment typeEmployment type Contract Job functionJob function Information Technology Industries IT Services and IT Consulting Referrals increase your chances of interviewing at SR2 | Socially Responsible Recruitment | Certified B Corporation by 2x Get notified about new Senior Java Software Engineer jobs inLondon, England, United Kingdom . 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