Technical Systems Data Analyst - Legacy Application Reverse Engineering £420 per day - Outside IR35 Initial six-month contract London - two days per week onsite We are recruiting a Technical Systems Data Analyst to investigate and formally document a complex, tightly integrated Legacy application and its underlying databases. This is not a BI, reporting, dashboarding or commercial analytics position. We require someone who has personally reverse-engineered poorly documented applications and databases and produced detailed technical data manuals for use by architects, developers and migration teams. The assignment You will analyse the current application and data environment to establish exactly how it operates, how its data is structured and how its different components interact. Your principal deliverable will be a comprehensive current-state documentation pack covering: Database schemas, tables, columns and data types. Primary and foreign keys, relationships and constraints. Indexes, views, stored procedures, functions and triggers. Business rules Embedded within databases, applications and established processes. Application-to-database interactions and access patterns. APIs, interfaces, integrations and external dependencies. End-to-end data flows and data lineage. Source-to-target mappings. Transformation, cleansing and validation requirements. Data-quality issues, risks, assumptions and unresolved gaps. Data dictionaries, entity-relationship diagrams and supporting ..... full job details .....