Location
London / Greater London
Salary
Up to £85,000
Contract
Permanent (Full Time)
Reference
R00TR02877
Closing Date
15 September 2025

JOB DESCRIPTION

We are looking for an experienced and motivated Base 24 Classic Developer. In this you will be responsible for analysing, designing, coding, and testing multiple components of application code. You will also perform maintenance, enhancements, and/or development work.
We are happy to consider flexible working approaches to help you perform at your best.
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 be located at our nearest regional hub. There will be a need to regularly connect with colleagues for collaboration events in one of our office sites. This is anticipated to be 2 days per week in one of our local offices. If your application is successful, your hiring manager will provide further details on how this works.
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 YOU’LL BE DOING

In this role, you are expected to be a Subject Matter Expert (SME) with deep knowledge and experience. This role requires expert proficiency in ACI BASE24 Classic Payments.
You will be part of the Payment CIO team delivering high quality changes to cater for the ever-evolving needs of our members. Within the Payment CIO you will be part of the BASE24 Development team which delivers changes and Scheme mandates for Debit Card users.

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 – we’re 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 don’t 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