Lead the architecture and engineering of an AI-assisted decision-systems prototype. You will design the agentic workflow, evaluation framework and control boundaries that connect authoritative source material to controlled representations, a deterministic language, standard data, and downstream implementations.
What you do
- Own the end-to-end technical architecture and engineering roadmap for the prototype.
- Design multi-agent workflows for extraction, decomposition, transformation, validation, comparison, and explanation of complex rule sets.
- Define where generative AI is appropriate and where deterministic code, schemas, constraints, and human approval are required.
- Engineer structured outputs, tool/API contracts, evaluation harnesses, golden datasets, error taxonomies, and regression tests.
- Work closely with the language/data architect so agent outputs conform to the DSL grammar, standard schema, and graph model.
- Create observable background across source evidence, agent transformations, human decisions, and generated artefacts.
- Provide technical leadership across AI, data, SAP, and assurance specialists.
- Deep experience designing and delivering GenAI/LLM systems beyond proof-of-concept prompting.
- Hands-on experience with agent orchestration, tool use, structured outputs, retrieval, and evaluation.
- Strong API/software-engineering skills, including automated testing.
- Experience designing AI quality measures, failure handling, human-in-the-loop controls, and auditability.
- Ability to lead architecture across AI, data models, line graphs, and enterprise systems.
- Knowledge representation, formal methods, or rules engines.
- Compiler/DSL awareness sufficient to collaborate on constrained generation.
- Knowledge graphs or graph databases such as Neo4j/RDF-based technology.
- Experience delivering AI in regulated, financial, government or other high-assurance environments.
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AI & Systems Architect employer: HM Revenue & Customs
At HMRC, we pride ourselves on being an exceptional employer, offering a unique opportunity to work in a vital compliance role that shapes the future of tax administration for the UK's wealthiest individuals. Our collaborative work culture fosters professional growth and development, with access to specialist training and resources that empower employees to excel in their roles. Located at the heart of the UK’s tax authority, we provide a meaningful career path where your contributions directly impact public services and support for families across the nation.
