Data Engineer – Payments Migration (Contract)
We're working with a leading consulting firm, who are delivery a key payments migration programme for a leading financial services firm, moving processing from a third-party provider into an in-house environment.
The immediate focus is to stand up core processing and connectivity quickly, with minimal disruption — so this role needs someone who has done this before in live, high-volume systems.
What you'll be doing:
* Supporting data migration activity within a payments environment
* Building and executing ETL pipelines and migration runs
* Troubleshooting data defects and issues
* Supporting dress rehearsals and go-live
* Designing safe data extraction approaches from live systems
Experience required:
* Proven experience delivering data migration in banking or payments systems
* Strong hands-on expertise with IBM DB2 on mainframe, including:
* Indexing, clustering, partitioning, archiving
* Query optimisation in high-volume environments
* Experience working in large-scale, high-throughput systems where:
* Data extraction cannot impact live processing
You'll need to be confident with:
* Data mapping and lineage
* Extracting data from complex, congested tables
* Reconciliation and validation of migrated datasets
* Running ETL processes in controlled production environments
Key considerations:
* Delivering extraction with zero impact to BAU payments processing
* Managing production risk carefully and pragmatically
* Working in environments where systems are complex and not always well documented
What matters:
* Able to work independently in a fast-moving, ambiguous environment
* Proactive in identifying issues early
* Comfortable escalating risks clearly and quickly
* Focused on delivery and getting things done safely
If you've delivered data migration in live payments environments and understand the risks involved, this is worth a conversation.