CosmosDB Data Engineer - Outside IR35 in City of Westminster

CosmosDB Data Engineer - Outside IR35 in City of Westminster

City of Westminster Full-Time No working from home possible
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CosmosDB Data Engineer


We are looking for a CosmosDB Data Engineer who can start a contract in the next 3 to 4 weeks.


You will have strong experience of data modelling and CosmosDB.



  • Design and maintain conceptual, logical, and physical data models for both relational (SQL) and non-relational (Cosmos DB / NoSQL) systems.

  • Design, develop, and manage NoSQL data models using Azure Cosmos DB, ensuring performance, scalability, and cost efficiency (partitioning strategy, indexing, RU optimization).

  • Define and implement data contracts to ensure consistency, quality, and governance across upstream and downstream systems.

  • Lead and support data migration projects, including planning, execution, validation, and reconciliation between source and target systems.

  • Build and orchestrate ETL/ELT pipelines using Azure Data Factory (ADF).

  • Write and optimize SQL queries, stored procedures, and views for relational data processing and reporting.


The role is for 3-6 months initially outside IR35 and requires two days in Central London each week.


LA International is an award-winning partner of choice for many of the world's most influential companies and government organisations. Holding Enhanced Government Security Accreditation, we are recognised as the European market leader in the delivery of Security Cleared talent to organisations that demand the very highest levels of security, compliance and assurance.


A multiple award-winning organisation, having secured the prestigious Queens Award for Enterprise: International Trade over consecutive years.


We are committed to fostering an inclusive, equitable and accessible workplace where everyone feels valued and supported.


We welcome applications from all individuals, regardless of background or identity, and we encourage candidates who may not meet every listed requirement to still apply. If you require any adjustments or support during the recruitment process, please let us know and we will work with you to ensure a fair and accessible experience.


Please note: If a high volume of applications is received, only candidates shortlisted will be contacted.

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CosmosDB Data Engineer - Outside IR35 in City of Westminster employer: Onyx-Conseil

CGI is an exceptional employer that fosters a collaborative and innovative work culture, allowing Senior Full-Stack Engineers to thrive in a hybrid environment across Scotland and Northern Ireland. With a strong focus on employee growth, we provide comprehensive benefits including a competitive salary, excellent pension, private healthcare, and equity options, ensuring our team members are rewarded for their contributions while making a meaningful impact in the digital landscape.

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Contact Details:

Onyx-Conseil Recruitment Team