Payments Data Migration Architect

Job Title: Payments Data Migration Architect Location : Fenchurch Street, London EC3M 4BT Work Type: Hybrid Duration: 4 Months Overview: TekWissen Group is a workforce management provider throughout the UK, Europe and many other countries in the world. The client below is a global professional services company with leading capabilities in digital, cloud, and security. Combining unmatched experience and specialized skills across more than 40 industries Job Summary Programme Overview We are looking for a highly experienced Payments Data Migration Architect to lead data architecture and migration activities across a complex payments transformation programme. This role requires strong expertise in payments systems, mainframe data environments, and migration execution across critical transaction platforms. The successful candidate will own the data architecture bridging legacy mainframe systems and target platforms, defining mappings, extraction strategies, controls, reconciliation, and migration assurance. Key Responsibilities Data Architecture & Migration Strategy Own end-to-end data architecture between mainframe and target platforms. Define source-to-target mappings and transformation logic. Establish migration controls, governance, and validation processes. Lead data migration planning, rehearsals, and cutover readiness. Mainframe Data Expertise Work extensively with IBM DB2 on Mainframe, including : Indexing Clustering Partitioning Archiving Query optimisation in high-volume environments Data Extraction & ETL Delivery Design safe extraction strategies from complex and congested tables. Deliver ETL processes in controlled production environments. Ensure no disruption to BAU payment processing during extraction runs. Manage performance and operational risk during migration activity. Data Quality, Reconciliation & Validation Define and execute reconciliation frameworks. Validate completeness, accuracy, and integrity of migrated datasets. Maintain data lineage and audit traceability throughout migration. Payments Domain Integration Support data migration across payment systems covering: BACS Faster Payments (FPS) WIFT SEPA Understand how payment messages, transactions, and downstream processes interact across production systems. Stakeholder Management Work closely with SMEs, engineers, DBAs, architects, and programme teams. Document assumptions, risks, mappings, and technical decisions. Escalate issues early and provide pragmatic resolutions. Mandatory Skills & Experience Strong experience delivering data migration in banking environments, ideally payments. Proven experience bridging legacy mainframe systems and modern target platforms. Deep expertise in IBM DB2 on Mainframe. Strong knowledge of ETL, data mapping, lineage, and reconciliation. Experience extracting data from high-volume live systems without disruption. Understanding of payment schemes: BACS, FPS, SWIFT, SEPA. Strong risk awareness and governance mindset. Ability to work independently in ambiguous environments. Proactive issue management and clear escalation skills. Desirable Skills Mainframe modernization programmes Payments engine migration projects Regulatory reporting data migration Large-scale cutover planning Performance tuning in enterprise DB2 environments TekWissen® Group is an equal opportunity employer supporting workforce diversity41bf1e1f-b16b-4260-a40a-17c77a06fd15…