Data Architect: Graph & Knowledge Platform

Appnovation Technologies; Greater London; On-site; GBP 90,000 - 120,000; Full time

Job summary

Appnovation Technologies in London is seeking a Data Architect / Engineer to own the data structures behind our graph-RAG platform and the pipelines that feed content into it. You will define schema and graph models, build ingestion pipelines from SharePoint and the Microsoft stack, and ensure knowledge graph accuracy as sources evolve.

You will drive data governance, implement scalable data pipelines, and optimize costs while collaborating with cross-functional teams to deliver high-impact

Qualifications

• Bachelor’s Degree in Computer Science or a related field.
• 5+ years of experience in data engineering/architecture roles.
• Deep data modeling across relational and graph paradigms; graph databases (Neo4j) and Postgres/Supabase at scale.
• Strong ETL / data pipeline experience in Python, including large-scale, incremental ingestion.
• Experience with enterprise content ecosystems: SharePoint, Power Platform / Power Automate.
• Knowledge representation, taxonomies/ontologies, and versioned/temporal data.
• Understanding of how data structures feed RAG and LLM retrieval quality.
• SQL proficiency; experience with orchestration tools (Airflow) and cloud data services.
• Familiarity with data governance, security, and privacy practices.
• Strong documentation and cross-team communication skills.

Responsibilities

• Define the schema, taxonomy, and graph modeling for the knowledge domains.
• Design how documents, versions, and their machine-readable representations are structured, and how facts evolve over time (including temporal replay).
• Build ingestion/ETL pipelines from enterprise content sources (e.g., SharePoint and the wider Microsoft stack), handling multimodal content (presentations, documents, transcripts).
• Keep the knowledge graph in sync as source documents change frequently.
• Advise on whether the current backend approach (Supabase/Postgres) is the right long-term architecture, and validate ingested content quality with QA.
• Establish data quality, lineage, and governance standards across pipelines.
• Build monitoring, alerting, and error-handling for ingestion jobs.
• Document data models, schemas, and pipeline architecture.
• Optimize pipeline cost, throughput, and reliability over time.

Skills

Data modeling

Graph databases

Python ETL

SQL

Airflow

SharePoint

Power Automate

Data governance

Cross-team communication

Education

Bachelor's degree in Computer Science

Tools

Neo4j

Postgres / Supabase

SharePoint

Power Automate

Job description

Appnovation Technologies in London is seeking a Data Architect / Engineer to own the data structures behind our graph-RAG platform and the pipelines that feed content into it. You will define schema and graph models, build ingestion pipelines from SharePoint and the Microsoft stack, and ensure knowledge graph accuracy as sources evolve.

You will drive data governance, implement scalable data pipelines, and optimize costs while collaborating with cross-functional teams to deliver high-impact