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Posted 06 August, 2026

Systems Data Analyst - SQL / NoSQL / Data Migration

Precise Placements
London, ENG, GB Full Time

Job Description

Systems Data Analyst – SQL / NoSQL / Data Migration

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6-Month Contract

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We are recruiting an experienced Systems Data Analyst to support a major application modernisation and data transformation programme within a leading international professional services organisation.

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This is a highly technical analysis role focused on understanding and documenting the databases behind a complex legacy business application. You will work with Developers, Architects and business specialists to establish how the existing system operates and support its migration into modern cloud and document-based database technologies.

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Key responsibilities

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  • Analyse legacy applications, databases and source systems.
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  • Reverse-engineer database structures where documentation is limited.
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  • Document schemas, tables, columns, relationships, indexes and constraints.
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  • Identify business rules, data flows, dependencies and integration points.
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  • Produce detailed source-to-target data mappings.
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  • Define data transformation and migration requirements.
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  • Work closely with Developers, Solution Architects, Data Architects and business SMEs.
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  • Support data quality, governance and application-modernisation objectives.
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Essential experience

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  • Strong hands-on SQL and relational database experience.
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  • Previous database reverse-engineering or legacy system analysis.
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  • Detailed schema and technical database documentation.
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  • Source-to-target mapping and data migration experience.
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  • Experience migrating relational SQL databases into a document-oriented NoSQL platform such as Cosmos DB, MongoDB, DynamoDB or Couchbase.
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  • Strong understanding of data modelling, ETL/ELT and transformation methodologies.
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  • Familiarity with Microsoft Azure or comparable cloud data services.
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  • Strong communication and stakeholder-engagement skills.
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Previous experience as a Database Analyst, Data Migration Analyst, Data Modeller, Technical Data Analyst or Database Administrator would be particularly relevant.

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Please note: this is not a conventional Power BI or reporting-focused Data Analyst position. Applicants must have technical database analysis and relational-to-NoSQL migration experience.

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Apply now if you have the required background and would like to contribute to a significant six-month application and data modernisation programme.