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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior AI Data Engineer - **Company:** ComplySci - **Location:** York, UK - **Experience:** Expert - **Salary:** £75,760.0 - **Contract:** Permanent contract - **Skills:** Application Programming Interfaces (APIs), Artificial Intelligence, Amazon Web Services, Microsoft Azure, Encodings, Information Engineering, Data Infrastructure, Data Integration, Data Integrity, Graph Database, JSON, Python (Programming Language), Neo4j, Operational Databases, Cloud Services, DataOps, Semantic Web, AI Infrastructure, Retrieval-Augmented Generation, Large Language Models, Backend, Knowledge Representation, Data Lineage, Data Analytics, Data Management, Domain Driven Design, Data Pipelines - **Published:** July 30, 2026 - **Apply:** https://www.adzuna.co.uk/jobs/details/5821090830 ## About the Role * Strong hands-on experience in data engineering, with a focus on semantic or AI data infrastructure * Experience building and operating knowledge graphs or graph databases (e.g. Jena Fuseki, Neo4j, Amazon * Neptune, or equivalent) * Experience with vector databases and embedding pipelines (e.g. Pinecone, Weaviate, Qdrant, pgvector) * Practical experience implementing RAG architectures or LLM-integrated data pipelines * Familiarity with semantic web standards - JSON-LD, RDF, OWL, or SKOS * Strong Python skills and experience with data pipeline frameworks * Experience with cloud-native data platforms (AWS, Azure, or GCP) * Exposure to domain-driven design (DDD) and bounded contexts is desirable. * Experience working directly with ontologists or knowledge engineers is a plus. * Familiarity with data contracts and data product frameworks is a plus. * Experience with DataOps tooling, data reliability, or data observability platforms is desirable. * Background in financial services, RegTech, or compliance data is a plus. Comply is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, disability, sex, sexual orientation, gender identity, or national origin. Nothing in this job posting should be construed as an offer or guarantee of employment. Applicants must be authorized to work for any employer in the United Kingdom. Currently, we are unable to sponsor or take over sponsorship of an employment Visa at this time. Comply is aware of scammers posing as Comply employees and extending job offers via direct messaging, texts and social media platforms. These are fraudulent and should be treated as such. ## Description We are looking for Senior AI Data Engineers to implement and operationalize Comply's semantic layer - turning the ontological models defined by our ontologist and architects into working knowledge graphs, vector search infrastructure, and LLM-powered pipelines. This is a hands-on engineering role at the intersection of knowledge representation, AI infrastructure, and data platform engineering. You will own the delivery of semantic layer components, collaborate closely with application and data engineering teams, and ensure that AI-ready data products are reliable, performant, and adopted in practice. You will report into the Data and Analytics organization as part of a new team being created to enable future data capabilities in relation to our AI ambitions.…, Semantic Layer Implementation * Implement JSON-LD-based semantic models designed by the ontologist into production data systems * Build and maintain knowledge graph structures that reflect canonical domain models * Develop and manage graph database schemas, queries, and data ingestion pipelines * Ensure semantic consistency between ontology definitions and downstream data product AI & Vector Infrastructure * Design and implement embedding pipelines that represent Comply's financial and regulatory data in * vector space * Build and operate vector database infrastructure for semantic search and similarity retrieval * Implement RAG (Retrieval-Augmented Generation) architectures that ground LLM outputs in Comply's * proprietary data * Evaluate and integrate LLM tooling and frameworks appropriate to Comply's use cases Data Pipeline & Platform Engineering * Build reliable, observable data pipelines that feed the semantic layer from upstream broker and * regulatory data sources * Apply DataOps practices including testing, monitoring, lineage tracking, and SLAs * Work with Data Engineers and Backend Engineers to embed semantic models into APIs and data contracts * Ensure the semantic layer scales with data volume and platform growth Collaboration & Enablement * Partner closely with the Ontologist to ensure implemented models faithfully reflect domain intent * Support consuming application teams in understanding and adopting AI-ready data products * Contribute to resolving cross-domain data integration challenges ## Related Videos - [Tips and Tricks for Working with JSON](https://www.wearedevelopers.com/videos/1229-tips-and-tricks-for-working-with-json) - [Putting the Graph In GraphQL With The Neo4j GraphQL Library](https://www.wearedevelopers.com/videos/257-putting-the-graph-in-graphql-with-the-neo4j-graphql-library) - [Developing the Backend with Stefan Lingler, CTO at Shpock](https://www.wearedevelopers.com/videos/100360-developing-the-backend-with-stefan-lingler-cto-at-shpock) - [Rethinking Recruiting: What you didn’t know about Responsible AI](https://www.wearedevelopers.com/videos/1090-rethinking-recruiting-what-you-didn-t-know-about-responsible-ai) - [Introducing JSON Structure](https://www.wearedevelopers.com/videos/100219-introducing-json-structure) - [Coffee with Developers - Maria Apazoglou](https://www.wearedevelopers.com/videos/1209-coffee-with-developers-maria-apazoglou) ## Related Articles - [Coffee with Developers - Maria Apazoglou - Making AI understandable for all in production](https://www.wearedevelopers.com/magazine/475-coffee-with-developers-maria-apazoglou-making-ai-understandable-for-all-in-production) - [Data Engineer Salary UK](https://www.wearedevelopers.com/magazine/253-data-engineer-salary-uk) - [How to Become an AI Engineer](https://www.wearedevelopers.com/magazine/331-how-to-become-an-ai-engineer) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [Navigating the AI Shift](https://www.wearedevelopers.com/magazine/629-navigating-the-ai-shift) - [Find a Developer Job: 12 Best Job Sites For Developers](https://www.wearedevelopers.com/magazine/165-find-a-developer-job-12-best-job-sites-for-developers)