Senior Business Analyst

Proactive.IT Appointments Ltd.; Greater London; On-site; GBP 85,000 - 115,000; Full time

Job summary

Proactive.IT Appointments Ltd. is seeking a Senior Business Analyst with end-to-end core banking transformation experience to support a wholesale banking platform review and replacement programme.

A strong mix of business analysis, banking product knowledge, data and interface definition, and vendor selection is required. You will work across international teams from discovery through go-live, defining requirements, RFPs, data models, interfaces and test strategies, ensuring alignment with

Qualifications

• Experience in discovery workshops and end-to-end core banking transformations.
• Ability to define requirements with end-to-end traceability and acceptance criteria.
• Proven track record in RFPs, vendor evaluation and platform demonstrations.
• Strong data modelling and interface specification skills.

Responsibilities

• Lead discovery workshops across business, operations, finance and IT.
• Define functional and non-functional requirements with traceability.
• Define future-state data model, data mappings and migration rules.
• Specify interfaces between core banking, settlement, GL and payments.
• Own RFP process from scope to vendor demonstrations and evaluations.
• Coordinate stakeholders across international teams and manage risks.
• Define test strategies and UAT scenarios for go-live.

Skills

Discovery workshops

Requirements management

Vendor evaluation

Stakeholder management

RFP ownership

Data modelling

Data mapping

Interface specification

UAT planning

Test strategies

Tools

Jira

Azure DevOps

Visio

Lucidchart

Job description

Senior Business Analyst - Core Banking Transformation

We are seeking an experienced Senior Business Analyst with proven end-to-end core banking transformation experience to support a major core banking platform review and replacement programme within wholesale banking.

This is a senior, hands‑on role requiring a strong blend of business analysis, banking product knowledge, data and interface definition, and vendor selection experience. You will play a pivotal role from initial discovery and requirements definition through RFP development, vendor evaluation, implementation, migration, testing and business readiness.

Working across business, operations, finance and technology teams in EMEA, the US and APAC, you will help define the future‑state platform and ensure it meets the bank’s functional, data, integration and operational requirements.

Key Responsibilities

• Lead discovery workshops across business, operations, finance and IT, documenting current‑state processes, data flows and system interfaces.
• Define functional and non‑functional requirements, maintaining end‑to‑end traceability and translating requirements into epics, user stories and acceptance criteria.
• Work with the Enterprise Data Architect to define the future‑state business data model, data mappings and migration reconciliation rules.
• Specify interfaces between the core banking platform, treasury settlement, general ledger and payment networks.
• Own the RFP process from a business analysis perspective, including scope, requirements, evaluation scenarios and scoring criteria; assess vendor responses and lead functional evaluations and demonstrations.
• Act as the primary day‑to‑day functional counterpart to platform vendors and delivery partners, resolving requirements, design and integration queries.
• Define test strategies and UAT scenarios, lead business defect triage and establish business readiness criteria for go‑live.
• Coordinate stakeholders across international teams, manage competing priorities and proactively elevate risks with clear options and recommendations.
• 10+ years' Business Analysis experience in banking, including at least one end‑to‑end core banking or treasury platform replacement from vendor selection through implementation and go‑live.
• Strong wholesale banking product knowledge, covering FX, money markets, interest rate swaps, bonds and corporate lending, including booking, settlement and accounting processes.
• Practical knowledge of SWIFT MT/MX messaging and ISO 20022 migration, with the ability to define interface requirements, message mappings and test scenarios for treasury and payments.
• Strong conceptual and logical data modelling, data mapping and migration reconciliation experience.
• Ability to interpret JSON and XML schemas, REST APIs and event‑driven API specifications.
• Proven experience authoring RFPs and evaluating enterprise banking software vendors.
• Expertise in requirements management and traceability using Jira or Azure DevOps, alongside process and interface modelling using BPMN, sequence diagrams and tools such as Visio, Lucidchart or equivalent.
• Experience defining test strategies, designing UAT and managing defects within complex transformation programmes.
• Excellent workshop facilitation and stakeholder management skills, including engagement with senior stakeholders across time zones and cultures.
• Calypso: Back‑office trade lifecycle, settlement and accounting event posting.
• Experience with wholesale or commercial banking platforms

Senior Business Analyst - Core Banking Transformation