Migration Test Lead/Migration Test Manager- (Financial Services) (h/f)

Migration Test Lead/Migration Test Manager- (Financial Services)

London- (Hybrid) x4 Days on-site
£600-£650

emagine is a high-end professional services consultancy and solutions firm Specialising in providing business and technology services to the financial services sector, we power progress, solve challenges and deliver real results through tailored high-end consulting services and solutions.

We have created a culture of openness and integrity by building genuine and strong relationships and partnerships, enabling us to be uncompromising in our dedication in delivering the optimal service for our clients. Our commitment is not just towards our clients but we aim to foster a positive and equitable working environment with our consultants and colleagues which stems from our core values: Confident, Dedicated, Responsible, Genuine.

We are seeking an experienced and hands-on Migration Test Lead to join a large-scale systems and data transformation programme. This role is critical to the successful migration of complex, high-value data from Legacy platforms into modern target systems, ensuring data accuracy, integrity, completeness, and regulatory compliance throughout the migration life cycle.

The Migration Test Lead will own and drive the data migration testing workstream end to end. This includes defining the migration test strategy, validating detailed data mapping specifications, executing ETL and reconciliation testing, and providing clear, decisive reporting to senior stakeholders.

This role requires someone who is comfortable working with ambiguity, able to initiate testing activities before mapping is fully finalised, and confident challenging assumptions and decisions to protect data quality and programme outcomes.

The role:

Migration Testing Leadership

• Lead and coordinate all data migration testing, ensuring thorough validation of source-to-target movement.

• Own the migration test strategy, scope, approach, and entry/exit criteria aligned to programme milestones.

• Drive testing across multiple cycles, including mock runs, dress rehearsals, cutover, and post-migration validation.

Data Validation & Mapping

• Develop, review, and execute test scripts to validate data accuracy, completeness, format, and reconciliation.

• Collaborate with data, architecture, and delivery teams to interpret and challenge mappings, transformation rules, and object models.

• Resolve ambiguities in mapping specifications and document assumptions.

• Validate historical and aged Legacy data, including complex multi-year datasets.

ETL & Reconciliation Testing

• Oversee ETL testing to ensure correct extraction, transformation, and loading of data into target systems.

• Perform detailed reconciliation between source and target systems using business rules and quality thresholds.

• Validate data masking and anonymisation for test environments as required.

Stakeholder Management & Reporting

• Act as primary contact for migration testing, liaising with senior stakeholders, programme leadership, and delivery partners.

• Provide concise reporting on progress, risks, issues, and decisions required.

• Manage challenging conversations, escalate risks, and safeguard data quality and timelines.

• Collaborate with business users, developers, and data teams to resolve issues efficiently.

Key Skills and Experience:

To succeed in this role you will need:

• Proven experience as a Migration Test Lead/Manager in Financial Services.

• Strong background in data migration testing within Banking, Wealth, or Asset Management platforms.

• Hands-on experience with migration mapping specifications, transformation logic, and reconciliation rules.

• Solid understanding of data modelling, object models, and data structures.

• Skilled at working with incomplete or evolving requirements.

• Strong knowledge of ETL processes, data validation, and data quality controls.

• Experience with data masking and handling sensitive financial data.

• Excellent communicator and confident stakeholder manager.

• Highly organised, delivery-focused, and accountable for outcomes.

Desirable

• Experience with core banking or wealth platforms (eg, Avaloq).

• Exposure to Legacy systems with large historical datasets.

• Familiarity with migration tooling, reconciliation frameworks, or data quality tools.

• Agile or hybrid delivery experience.

• Experience coordinating multi-vendor or collaborative migration testing

Interested?

emagine is an equal opportunity employer, and employment practices are based strictly on merit. It is the policy of the Company to give equal opportunity in employment regardless of sex, sexual orientation, marital status, race, age, disability, gender reassignment, pregnancy and maternity, religion or ethnic origin