Pega Senior System Architect - E2 Engineer

We are seeking a highly skilled and experienced Pega Senior System Architect to join our team. The ideal candidate will have a strong background in Pega application development and architecture, with post-CSSA (Certification for Senior System Architect) certification.

You will be responsible for designing and implementing robust Pega solutions across a dynamic and expanding portfolio. Collaborate closely with cross-functional teams and lead development efforts, ensuring architectural integrity and adherence to best practices throughout the software development lifecycle. Engaging directly with business stakeholders to co-create solutions, manage deployments via CI/CD pipelines, and support all phases of development from ideation to production.

Pega is rapidly scaling across the building society, particularly within the Mortgages and Financial Wellbeing department. As part of a collaborative and supportive development team, you'll contribute to a wide range of initiatives, bringing deep expertise in building Pega applications of varying complexity. This role offers opportunities for technical leadership, innovation, and personal growth in a fast-evolving environment.

This role is part of the Mortgage Operations Value Stream within the Mortgages and Financial Wellbeing department-a critical area focused on delivering seamless, efficient, and member-centric mortgage services. The team supports the full lifecycle of mortgage operations, from application through servicing, ensuring timely, transparent, and supportive experiences for members., As an experienced Senior System Architect, you'll play a pivotal role in the full software development lifecycle. From engaging with business stakeholders to designing and implementing scalable Pega solutions and managing deployments through CI/CD pipelines. You'll lead and mentor developers across varying experience levels, ensuring timely delivery of high-quality code that aligns with architectural best practices.

You'll serve as the primary technical point of contact for multiple stakeholders, translating complex technical concepts into business-friendly language, committing to delivery timelines, and addressing queries related to Pega Mortgages. This role demands both technical depth and strong communication skills, as you'll be at the intersection of engineering, business, and delivery., 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.

• Hands-on experience in Pega development, including as a Pega Certified Senior System Architect
• Expertise in core Pega features such as case management, integrations, reporting, SLA management, and performance optimization
• Skilled in designing scalable class structures, data models, UI components, and integration strategies
• Proven track record of delivering Pega projects into production and optimizing application and database performance
• Experience leading development teams, mentoring junior engineers, and conducting code reviews to ensure best practices
• Active contributor to architectural discussions and technical strategy, aligning solutions with business goals
• Collaborated with cross-functional teams to translate business requirements into maintainable Pega solutions and manage deployments via CI/CD pipelines

There are all sorts of employee benefits available at Nationwide, including:

• 25 days holiday, pro rata
• From January 2026, all colleagues will have access to fully funded private medical insurance
• A personal pension - if you put in 7% of your salary, we'll top up by a further 16%
• Access to an annual performance related bonus
• Access to training to help you develop and progress your career
• A great selection of additional benefits through our salary sacrifice scheme
• Life assurance worth 8x your salary
• Wellhub - access to a range of free and paid options for health and wellness
• Up to 2 days of paid volunteering a year

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 2-4 times per month in either Bournemouth, Swindon, London or Northampton. If your application is successful, your hiring manager will provide further details on how this works. 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., 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.