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NextWave Consulting
Backend Java Developer — Sheffield • Hybrid • £50–65k • Not London

Backend Java Developer — Sheffield • Hybrid • £50–65k • Not London

Hybrid

Sheffield, United kingdom

Full Time

11-03-2026

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Skills

Java SQL Data Governance CI/CD Docker Jenkins Architecture apache Junit Spring Maven gRPC

Job Specifications

You don't need to move to London to work on global-scale data infrastructure.

Location: Sheffield (Hybrid)

Employment: Fixed Term Contract

Salary: £50,000 – £65,000 base (dependent on experience)

What You’ll Do

Build core backend services in Java (17/21) for access control and query manipulation
Implement deterministic policy / rule engines for data governance
Work on SQL parsing, planning, validation, and transformation (e.g., Calcite or similar planners)
Integrate with distributed data platforms / query engines (e.g., Starburst or similar)
Own API contracts with living documentation in CI/CD
Build production-grade, testable pipelines
Drive observability, reliability, and performance
Contribute to architecture decisions (modularity, DI, extensibility)

What You Bring (Must-Have)

Strong hands-on experience in Java (17/21) + Spring
Deep understanding of JDBC, SQL parsing/validation, query planning/optimization
Experience with SQL planners or query transformation layers
Strong grounding in data structures, algorithms, and backend performance
Production-grade testing using JUnit 5, Mockito
Experience with clean architecture, DI, modular design
Comfortable owning CI/CD, code quality, observability
Familiarity with Docker, Maven, Jenkins

Nice to Have

Apache Calcite
Starburst or federated query engines
JVM performance tuning
High-throughput service interfaces (REST/gRPC)
Data governance or policy enforcement layers

About the Company

NextWave is an award-winning Consultancy. Financial Services rms trust us to provide market-leading Strategy, Specialist transformation and AI-enabled automation Solutions. We help our clients to rapidly deliver business outcomes. NextWave supports many of the world's leading Financial Institutions, including global banks, insurance firms, asset and wealth managers, private banking and private equity houses. We have specialist transformation teams across Front Ofce, Risk, Data, Finance, Compliance and Operations, plus solu... Know more