Senior Data Engineer

Position: Senior Data Engineer (Contract)
Contract Length:
Initial 6 months (extension likely)
Day Rate: £500 per day (Outside IR35)

Location:

Hybrid in South Wales

Role Overview
We are seeking an experienced Senior Data Engineer contractor to support and extend the Azure Databricks Lakehouse platform, ensuring the reliable delivery of new data pipelines alongside ongoing operational stability.

This is a hands‑on engineering role focused on implementation, optimisation and support of Delta Lake pipelines across Bronze, Silver, Staging and Gold layers, operating within an established architectural framework.

Key Responsibilities

Develop and maintain data pipelines in Azure Databricks using PySpark and SQL
Build incremental processing using Delta Lake and Change Data Feed
Extend and maintain watermark‑driven CDC frameworks
Implement and maintain Slowly Changing Dimension (SCD Type
2) logic
Engineer time‑aware joins and dimensional transformations
Support optimisation of Spark workloads and Delta tables
Solid understanding of dimensional modelling and star schema Medallion Architecture Delivery

Implement ingestion patterns into Bronze
Build Silver state, CDC and SCD2 tables
Develop Gold dimensional models aligned to Kimball principles.
Maintain clean separation of Bronze, Silver and Gold usage and responsibilities

Delta Lake & Performance Optimisation

Work extensively with Delta Lake features including:
ACID transactions
Merge‑based upserts
Partitioning and data layout strategies
Tune Spark jobs and clusters to improve performance and cost efficiency
What you need to do now
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