Senior Java Engineer - EN03

Description This; Greater London; Hybrid; GBP 60,000 - 80,000; Full time

Job summary

A leading financial service provider is seeking an E3 Senior Java Engineer to enhance member experience and drive technical excellence. You will take end-to-end ownership of high-performance middleware solutions, collaborate with teams, and mentor others. The role offers the flexibility of hybrid working, with colleagues coming together in London and Swindon offices. Ideal candidates possess deep Java expertise and leadership skills. The position includes competitive benefits and the opportunity for personal and professional growth.

Benefits

Private medical insurance

Competitive pension

Annual performance-related bonus

Training and development opportunities

Salary sacrifice benefits

Life assurance

Health and wellness options

Paid volunteering days

Qualifications

• Deep expertise in designing high-performance, resilient middleware systems.
• Substantial Kubernetes experience, leveraging Infrastructure as Code.
• Leadership experience with proven ability to guide development teams.

Responsibilities

• Serve as a key technical leader across Banking domains.
• Take end-to-end ownership of the platform domain.
• Mentor in-house and partner teams to enhance capabilities.

Skills

Java

Kubernetes

Leadership

CICD tooling

Object-oriented programming

Tools

SpringBoot

Terraform

Helm

Job description

London, United Kingdom
Swindon, United Kingdom

We are seeking an E3 Senior Java Engineer with proven track record in service design and development within our integration middleware space. In this lead role you will contribute to enhancing our member experience by driving technical excellence and promoting best practices across our IT landscape.

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 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 you’re 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 hybrid working here .

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.

Uncompromisingly Customer, whatever our role

Extras you’ll get

• From January 2026, all Nationwide colleagues will benefit from private medical insurance
• A highly competitive pensionto help you build a strong foundation for retirement
• Access to an annual performance related bonus
• Training and development to help you progress your career
• A great selection of additional benefits through our salary sacrifice scheme
• Life assurance to provide peace of mind for you and your loved ones in the event of your death
• Wellhub – access to a range of free and paid options for health and wellness
• Up to 2 days of paid volunteering a year

Banking – but fairer, more rewarding, and for the good of society

We forge our own path at Nationwide.

As a mutual, we’re owned by our members – those customers who bank, save or have a mortgage with us. We challenge the financial sector status quo. We don’t 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 you’re inspired by fairer finances, passionate about making a meaningful impact, and truly care about our customers, you’re 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 ‘Apply Now’ button. You’ll 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.

Banking - but fairer, more rewarding, and for the good of society

What you’ll be doing

As an E3 Senior Java Engineer within our Business Integration Systems team you will serve as a key technical leader across our Banking domains. Leveraging your considerable expertise in service design and development you’ll create and deliver robust solutions that will power our consumer-facing channels well into the future.

You’ll take end-to-end ownership of your platform domain – leading by example through design, development, deployment and continuous improvement. Collaborating closely with internal stakeholders, project managers, engineers and other technical leads you’ll help align efforts and drive delivery.

You should already be adept at leading multiple project deliveries, navigating complexity and thriving in collaborative environments but added to this you will also play a mentorship role, sharing your knowledge with both in-house and partner teams. Your practical experience and strategic insight will help shape the capabilities of a high-performing technology organisation.

We’ll empower you with the tools and flexibility to work your own way, ensure your voice is heard and support your personal growth both technically and commercially. Our clear and proven career pathways reflect our commitment to continuous development, challenging even our most skilled engineers to reach new heights.

About you

• Deep expertise in designing and developing high-performance, resilient, scalable, and secure middleware systems
• Accomplished in Java (ideally with SpringBoot or similar framework) with a solid foundation in object-oriented programming
• Substantial Kubernetes experience (Istio Service Mesh experience would be advantageous) leveraging Infrastructure as Code (IaC) across hybrid cloud and on-premises environments
• Leadership experience with a proven ability to guide, inspire and empower development teams
• Skilled at engaging stakeholders across functions and levels, using clear communication and strategic influence to foster alignment and deliver great results
• Experience with CICD tooling such as Harness and Helm
• An understanding of security concepts such as TLS, certificates, JWTs, OAuth and OIDC authentication protocols
• Experience in integrating systems across a wide range of technologies, including Microsoft, IBM, SAP, Unisys and cloud-based services

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

You can strengthen your application by showing how our customer first behaviours resonate with you, and where you may have already demonstrated these.

Job Info

• Job Identification 635
• Apply Before 01/04/2026, 11:55 PM
• Locations Nationwide House, Swindon, Wiltshire, SN38 1NW, GB 1 Threadneedle Street, London, Greater London, EC2R 8AY, GB