Full Stack Developer (Microsoft Fabric/DIAS)
Full Stack Developer (Microsoft Fabric/DIAS)
Contract: end March 2026 (extensions in view)
Rate: £620 per day (Inside IR35)
Location: Mostly remote
Security Clearance: Active SC required
Start: Immediate
We are looking for an experienced Full Stack Developer to support the development of user-facing applications built on top of DIAS running on Microsoft Fabric. This role focuses on building secure, high-performance web applications and APIs that enable analysts, policy teams and operational users to explore and interact with complex datasets and LLM-powered capabilities.
Key Deliverables
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Design, build and maintain user-facing web applications on top of DIAS/Fabric data
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Implement, alongside other engineers, a high-quality medallion architecture and STAR schemas to support cross-source data matching
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Develop features to support highly granular cross-database searches
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Build secure, performant Back End APIs and services to expose DIAS data and LLM functionality
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Deliver Front End features, visualisations and workflows for analysts, policy and operational users
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Integrate with Microsoft Fabric (Lakehouse, Warehouses, Power BI, LLM endpoints) and other HMT systems
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Implement authentication, authorisation and RBAC in line with HMT security and data access policies
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Build UI components to support LLM use cases (chat interfaces, prompt tooling, feedback capture, evaluation dashboards)
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Maintain CI/CD pipelines, automated testing and monitoring across Front End and Back End services
Key Skills Required
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Strong experience with a modern Front End framework (React, Angular or Vue) using TypeScript/JavaScript
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Proven experience building REST and/or GraphQL APIs (eg .NET, Node.js, Python/FastAPI)
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Solid understanding of web security, OAuth/OpenID Connect and role-based access control
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Experience integrating with data and analytics platforms (ideally Microsoft Fabric, Power BI and Azure services)
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Familiarity with LLM integration patterns (API usage, RAG, prompt design, feedback and telemetry capture)
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Strong Git and DevOps capability, including CI/CD pipelines and automated testing
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Comfortable working closely with designers, data engineers, analysts and policy teams, with the ability to clearly explain technical decisions
Please note: Active SC clearance is mandatory. This role is inside IR35, mostly remote, and requires an immediate start.