{"id":1807119,"url":"https://alion.io/job/nextwave-backend-java-developer-birmingham-hybrid-50-65k-not-london","title":"Backend Java Developer - Birmingham Hybrid £50–65k Not London","company":{"id":2564510,"name":"Nextwave","domain":"nxwave.com","url":"https://alion.io/company/nxwave-com","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Freshteam","truth_index":null},"role":"Backend","role_family":"Backend","seniority":null,"employment_type":"contractor","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["London, United 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API","optional":true}],"status":"live","first_seen_at":"2026-10-03T19:28:48Z","employer_posted_date":"2026-10-03","last_verified_at":"2026-10-21T10:28:44Z","board_verified":true,"closed_at":null,"days_open":17,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":17},"description":"Backend Java Developer\nLocation: Birmingham (Hybrid)\nEmployment: Fixed Term Contract\nSalary: £50,000 - £65,000 base (dependent on experience)\nIf your idea of backend engineering is more than CRUD APIs and microservices boilerplate - this role is for you.\nWe’re building the core backend services of a Data Fabric platform that governs data access, entitlements, and query policy enforcement across distributed enterprise data systems.\nThis is platform engineering: deterministic rule engines, SQL planning/interception, and high-throughput services that sit on the critical path of data access.\nThis is deep backend + data infrastructure work.\nWhat You’ll Do\nBuild core backend services in Java (17/21) for access control and query manipulation\nImplement deterministic policy / rule engines for data governance\nWork on SQL parsing, planning, validation, and transformation (e.g., Calcite or similar planners)\nIntegrate with distributed data platforms / query engines (e.g., Starburst or similar)\nOwn API contracts with living documentation in CI/CD\nBuild production-grade, testable pipelines\nDrive observability, reliability, and performance\nContribute to architecture decisions (modularity, DI, extensibility)\nWhat You Bring (Must-Have)\nStrong hands-on experience in Java (17/21) + Spring\nDeep understanding of JDBC, SQL parsing/validation, query planning/optimization\nExperience with SQL planners or query transformation layers\nStrong grounding in data structures, algorithms, and backend performance\nProduction-grade testing using JUnit 5, Mockito\nExperience with clean architecture, DI, modular design\nComfortable owning CI/CD, code quality, observability\nFamiliarity with Docker, Maven, Jenkins\n⭐ Nice to Have\nApache Calcite\n Starburst or federated query engines\nJVM performance tuning\nHigh-throughput service interfaces (REST/gRPC)\nData governance or policy enforcement layers\nThis Role Is Ideal If You’ve Worked On\nData platforms, governance layers, query engines, or SQL planners\nBackend/platform services that sit in the critical path of data access\nSystems where correctness, determinism, and performance matter","description_format":"text","description_chars":2121,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[{"name":"United Kingdom","iso":"GB","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Data & Analytics","Financial Services","Professional 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