I''m hiring a Senior BI Data Architect to join a global SaaS organisation and take ownership of a large-scale data platform transformation.This is a hands-on architecture role sitting at the intersection of data engineering and BI - where your work will directly shape how the business uses data to make decisions.The companyA global technology business operating in the data and insights / research space, serving major clients worldwide and processing hundreds of millions of data points annually.They are investing heavily in modernising their data platform and analytics capabilities, with a strong focus on performance, scalability, and self-serve analytics.The roleYou''ll take full ownership of the Databricks Lakehouse and BI architecture, leading the migration away from legacy systems while building a clean, governed and scalable platform.This is not just a design role - you''ll be deep in the detail, refactoring SQL, building pipelines, and optimising performance.What you''ll be doingDesign and implement a governed Databricks Lakehouse architecture (Unity Catalog, schemas, volumes)Lead migration of complex legacy SQL logic into modular, scalable pipelinesBuild and optimise data transformation frameworks using Spark / Python / SQL pipelinesAct as the go-to expert for query performance optimisation (Spark execution plans, data skew, joins)Design and implement dimensional data models (star / snowflake schemas)Architect the semantic layer for BI (Omni or similar tools like Looker