Impellam Group
Senior Data Engineer — Data Architecture Discovery & Documentation
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Role: Technical Data Consultant — Data Architecture Discovery & Documentation
Contract Type:
£400 - 500/day Outside IR35 | 3 months (initial)
Location:
Hybrid — Manchester & Birchwood, Warrington (2 days/week onsite)
Overview:
A retail and gaming client needs an experienced consultant to reverse-engineer their Retail data landscape — spanning an on-premise SQL Server data warehouse and AWS estate — and convert undocumented, tribal knowledge into a sustainable, well-documented operating model.
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Core Responsibilities:
- Conduct independent deep-dive discovery and code reviews to map data flow from Retail systems into the data warehouse
- Produce high-level and granular architecture diagrams (cloud resources, ETL/ELT pipelines, third-party integrations)
- Author operational runbooks for troubleshooting, restart and maintenance of critical pipelines
- Audit and document the SQL logic behind key retail metrics for reporting consistency
- Design a lightweight, maintainable documentation framework (Confluence/Markdown-based) for the team
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What We're Looking For:
- Proven experience reverse-engineering data systems with little or no existing documentation
- Strong hands-on experience with SQL Server and AWS Lakehouse architecture
- Expert-level ability to produce clear, structured architecture diagrams
- Comfortable working independently, and skilled at engaging senior engineers who may be protective of their systems — positioning the work as empowering rather than replacing them
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