Senior Data Engineer

OSCAR ASSOCIATES (UK) LIMITED
City of London
4 months ago
Applications closed

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Senior Data Engineer — 6‑Month Contract (Outside IR35) — London

OSCAR ASSOCIATES (UK) LIMITED is seeking an experienced Data Engineer for an initial 6‑month contract on an onsite basis in London.


Contract: 6 months (likely extension)
Location: London (on‑site)
Rate: £500‑600 per day
Start date: ASAP


Required Skills

  • Strong expertise with MSSQL Server and OLAP/Tabular models (SSAS Tabular, Azure Analysis Services, or Power BI Semantic Models).
  • Advanced SQL and dimensional data modelling skills (fact/dimension design, hierarchies, SCDs).
  • Proven experience building ETL/ELT pipelines using tools such as SSIS, dbt, or Airflow.
  • Solid understanding of database administration, tuning, and performance optimisation across MSSQL and PostgreSQL.
  • Background in financial services or trading environments, with exposure to complex, high‑volume datasets.

Key Responsibilities

  • Design and maintain data models that meet business requirements, ensuring scalability, consistency, and accuracy.
  • Build and manage ETL/ELT pipelines to integrate data from S3 and various sources into the analytical layer.
  • Administer and optimise MSSQL Server and PostgreSQL databases for performance and reliability.
  • Collaborate with internal teams to improve data availability, reliability, and performance across systems.
  • Design and maintain secure, scalable AWS cloud infrastructure supporting analytical workloads.
  • Create and maintain dimensional and semantic data models for Power BI and Excel integration.
  • Evaluate new data modelling tools and techniques to continuously improve efficiency and scalability.

If you’re interested, apply now for immediate consideration. Oscar Associates (UK) Limited is acting as an Employment Business in relation to this vacancy. To understand more about what we do with your data, please review our privacy policy in the privacy section of the Oscar website.


We use LinkedIn and referrals to help identify suitable candidates.


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