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A leading UK financial service is seeking a Cryptographic Software Engineer to support its crypto environment and drive technology strategies. The role involves working with Assembler and C on IBM mainframe systems, including out of hours support. Candidates should have operational experience on z/OS and skills in troubleshooting complex technical issues. This position offers a hybrid working model and comprehensive benefits including a generous pension contribution and wellbeing initiatives.
Thursday 30 October 2025
£70,929 - £106,394
Hybrid Working, Job Share
Job Description
Cryptographic Software Engineer - Assembler
From £70,929 dependent on experience and location
Edinburgh or London
Full time (This role will include a requirement to work as part of a 24x7 on-call rota)
Our work style is hybrid, which involves spending at least two days per week, or 40% of our time at our location listed above.
The Chief Security Office (CSO) plays a vital role in delivering Lloyds Banking Group's vision of putting customers at the heart of everything we do, helping Britain prosper, and protecting the Group and its customers and suppliers from security threats.
In this role, you will be involved in the planning and migration of legacy code written in assembler and assisting with rewriting this in C. You’ll help maintain and help migrate services according to Group security standards and policies (and to agreed service levels) and will assist with the delivery of investment funded work within mainframe environments – this includes out of hours. Additionally, you’ll provide technical support (including incident and problem resolution for systems and processes in complex environments) – again this includes out of hours support.
Like the modern Britain we serve, we’re evolving. Investing billions in our people, data, and tech to transform the way we meet the ever-changing needs of our 26 million customers. We’re growing with purpose. Join us on our journey and you will too.
Our ambition is to be the leading UK business for diversity, equity and inclusion supporting our customers, colleagues and communities and we’re committed to creating an environment in which everyone can thrive, learn and develop.
We were one of the first major organisations to set goals on diversity in senior roles, create a menopause health package, and a dedicated Working with Cancer Initiative.
We offer reasonable workplace adjustments for colleagues with disabilities, including flexibility in office attendance, location and working patterns. And, as a Disability Confident Leader, we guarantee interviews for a fair and proportionate number of applicants who meet the minimum criteria for the role with a disability, long-term health or neurodivergent condition through the Disability Confident Scheme.
We provide reasonable adjustments throughout the recruitment process to reduce or remove barriers. Just let us know what you need.
We also offer a wide-ranging benefits package, which includes:
Want to do amazing work, that’s interesting and makes a difference to millions of people? Join our journey.
At Lloyds Banking Group, we're driven by a clear purpose; to help Britain prosper. Across the Group, our colleagues are focused on making a difference to customers, businesses and communities. With us you'll have a key role to play in shaping the financial services of the future, whilst the scale and reach of our Group means you'll have many opportunities to learn, grow and develop.
We keep your data safe. So, we'll only ever ask you to provide confidential or sensitive information once you have formally been invited along to an interview or accepted a verbal offer to join us which is when we run our background checks. We'll always explain what we need and why, with any request coming from a trusted Lloyds Banking Group person.
We're focused on creating a values-led culture and are committed to building a workforce which reflects the diversity of the customers and communities we serve. Together we’re building a truly inclusive workplace where all of our colleagues have the opportunity to make a real difference.