Data Modeller / GraphQL Developer

Salary: £60,000 - 90,000 per year

Requirements:

• We require eligibility for NPPV3 and SC security clearance during the engagement.
• We require you to be eligible for the security clearances needed for this role.
• Strong experience in data modelling, including conceptual, logical, and physical data models for enterprise platforms.
• Experience developing GraphQL APIs, schemas, and resolvers.
• Experience integrating GraphQL services with enterprise databases and data platforms.
• Strong SQL skills for validation, transformation, profiling, and reporting.
• Experience working across complex ETL and ELT environments.
• Knowledge of enterprise data governance, metadata management, and data lineage.
• Experience with data quality, privacy, regulatory, and governance requirements.
• Ability to optimise API, query, and database performance.
• Experience implementing authentication, authorisation, and security controls for services.
• Strong documentation and solution design skills.
• Ability to collaborate effectively with architects, analysts, engineers, governance specialists, and business stakeholders.

Responsibilities:

• We design conceptual, logical, and physical data models for enterprise data platforms.
• We develop scalable and reusable data models that support analytical and operational business requirements.
• We design data structures across complex ETL and ELT environments from raw ingestion through to curated and consumption layers.
• We maintain enterprise metadata, data dictionaries, and business glossaries.
• We ensure consistent application of enterprise data standards and governance frameworks.
• We design, develop, and maintain GraphQL APIs, schemas, and resolvers.
• We integrate GraphQL services with enterprise databases and data platforms.
• We optimise API and query performance to support scalable, high-performing applications.
• We implement authentication, authorisation, and security controls for GraphQL services.
• We support enterprise data governance initiatives, including metadata management and data lineage programmes.
• We ensure compliance with data quality, privacy, regulatory, and governance requirements.
• We support the implementation and maintenance of enterprise data catalogues and governance tooling.
• We develop advanced SQL solutions for data validation, transformation, profiling, and reporting.
• We optimise database performance and support governance-focused analytics requirements.
• We collaborate with architects, business analysts, data engineers, and stakeholders to translate business requirements into technical solutions.
• We participate in design workshops, architecture reviews, and technical governance activities.
• We produce and maintain high-quality technical documentation, data models, and solution designs.

Technologies:

• API
• ETL
• GraphQL
• Support
• SQL
• Security

More:

We are hiring for a 12-month hybrid contract based in London or Reading, offering a competitive day rate outside IR35. This role sits within a major enterprise-wide data governance programme focused on improving data quality, accessibility, compliance, and governance across a complex business environment. You will work closely with enterprise architects, business analysts, data engineers, governance specialists, and business stakeholders to deliver robust data solutions that support enterprise data catalogues, metadata management, and complex analytical and operational workloads. If you receive suspicious outreach claiming to be from us, please contact us via the ManpowerGroup website.

last updated 32 week of 2026