Job Description

This role is within the Mortgages CIO function under CT (Customer Technology), part of the wider COO organisation, which is responsible for delivering IT solutions which have our customers and colleagues at heart.
You will be accountable for end-to-end delivery of the agreed roadmap that supports our Integration and Migration Strategy. You will work closely with Principal engineers and Technology Leads to provide leadership and support to our Engineering teams.
As a Lead Engineer you will ensure our systems and platforms are designed, developed and tested in a resilient and secure manner, aligned to strategy, ensuring were applying good engineering practices and principals. Mortgages are primarily provided via brokers, through our online and API channel. We are actively expanding our propositions in both the Home and Landlord space as part of integration.
This role will drive a culture of continuous improvement, with a focus on building technical capability (including people) across all disciplines. Across CT, we have an important journey ahead of us to build and maintain our position in the market and respond to changing customer needs, guided by the strategic pillars of More Rewarding Relationship, Simply Brilliant Service and Focused, Fit and Fast.
At Nationwide we offer hybrid working wherever possible. More rewarding relationships are supported through our hybrid approach, bringing colleagues together across our UK wide estate, whilst also supporting generous access to home working. We value our time in the office to solve problems, to learn, and to feel connected.
For this job you'll spend at least two days per week, or if part time you'll spend 40% of your working time, based at either our Swindon or London office. Whilst these locations are where we are primarily looking to fill the role, if youre an internal applicant based in a different location we would welcome your application and if successful, your hiring manager will provide further details on how this could work for this specific role. You can also find out more about our approach to .
If we receive a high volume of relevant applications, we may close the advert earlier than the advertised date, so please apply as soon as you can.
What youll be doing

• Contribute to the design and execution of the data migration and integration strategy within the Mortgages area, supporting the broader integration programme objectives.
• Collaborate with internal stakeholders, business analysts, and architects to translate functional and non-functional requirements into technical data solutions.
• Design, build and maintain robust, scalable and high-performance ETL/ ELT pipelines using modern data engineering tools and practices, ensuring quality, lineage and auditability.
• Support data discovery activities and analysis to inform data mapping, profiling, and migration planning, especially in the context of mergers or acquisitions.
• Develop and maintain detailed technical design documents and data flow diagrams aligned with architectural principles and data governance standards.
• Assist in the implementation and enforcement of best practices in data engineering, including coding standards, testing strategies, and automation.
• Partner with cloud and infrastructure teams to build and optimise data pipelines across hybrid environments (on-perm and cloud platforms).
• Participate in technical reviews and sprint planning, contributing to continuous improvement in delivery and engineering practices.
• Provide hands-on development and troubleshooting expertise throughout the project lifecycle, resolving data issues and ensuring completeness and accuracy of migration efforts.
• Ensure alignment of delivery artefacts with the enterprise data strategy and technical roadmap set by data leadership, maintaining consistency across initiatives.
• Proactively identify risks, bottlenecks, and inefficiencies in integration processes, and drive continuous improvement through targeted technical enhancements and mentoring of junior engineers.

About you
We need somebody with:

• Proven hands-on experience in the data engineering, integration, and migration within complex data environments.
• Solid technical skills in ETL development, data transformation, and performance tuning, with a strong grasp of cloud-based ETL frameworks and modern data engineering principles.
• Working experience in ETL tools like Informatica, AbInitio, DBT, AWS Glue, etc.
• Proficient in structured query languages, data modelling, and familiar with at least one programming or scripting language commonly used in data engineering.
• Strong understanding of data quality, data governance, and metadata management practices across the data lifecycle.
• Experience of working in banking & financial services, particularly with mortgage data or customer-centric systems.
• Proven ability to support data migration efforts in M&A scenarios, including data discovery, profiling, mapping and reconciliation.
• Familiarity with cloud platforms and hybrid data solutions, with the ability to design and operate scalable data pipelines across environments.
• Strong problem-solving skills with the ability to thrive in Agile delivery environments, supported by a mindset focused on continuous improvement, learning and engineering maturity.
• Good collaboration across business, architecture, and engineering teams and promoting innovation through shared understanding.

Our customer first behaviours put customers and members at the heart of how we work together. They are the set of behaviours that every colleague needs to display, in every role:

• Feel what customers feel - We step into our customers shoes, using their feedback and insights to empathise with them and to understand their needs, so that every decision we make starts and finishes with our customers in mind

• Say it straight - We are brave in speaking out and saying what we think were honest and direct with good intent, openly sharing diverse perspectives to reach the best conclusions and using language everyone can understand
• Push for better - We dont settle for mediocrity, we challenge the status quo, taking responsibility for continuous improvement and personal development
• Get it done - We prioritise what will have the greatest impact, we are decisive, and we take accountability for delivering brilliant customer outcomes.

You can strengthen your application by showing how our customer first behaviours resonate with you, and where you may have already demonstrated these.
The extras youll get
There are all sorts of employee benefits available at Nationwide, including:

• A personal pension if you put in 7% of your salary, well top up by a further 16%
• Up to 2 days of paid volunteering a year
• Life assurance worth 8x your salary
• A great selection of additional benefits through our salary sacrifice scheme
• Wellhub Access to a range of free and paid options for health and wellness
• Access to an annual performance related bonus
• Access to training to help you develop and progress your career
• 25 days holiday, pro rata

Banking but fairer, more rewarding, and for the good of society
We forge our own path at Nationwide.
As a mutual, were owned by our members - those customers who bank, save or have a mortgage with us. We challenge the financial sector status quo. We dont see customers as the engine of our own profit. We share our profits with them and put their needs first. Always there when they need us. Supporting them and their lives.
If youre inspired by fairer finances, passionate about making a meaningful impact, and truly care about our customers, youre one of us.
At Nationwide, you are challenged to grow and rewarded for doing so. Valued. Recognised. Inspired to be your best. As a community we want our working lives to count. As a team, we celebrate what we achieve. As a standard-setter, we work for the good of customers, communities, and broader society.
We are Purpose-driven. Uncompromisingly Customer. Unstoppably Nationwide.
What to do next
If this role is for you, please click the xe2x80x98Apply Now button. Youll need to attach your up-to-date CV and answer a few quick questions for us.
We respond to everyone, so we will be in contact shortly after the closing date to let you know the outcome of your application.
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