Lead Platform Engineer

BELONG – There’s no place like Principality

At Principality, belonging isn’t just a value — it’s how we work. When you join us, you’re welcomed into a supportive, inclusive community where your home life, wellbeing, and individuality are genuinely respected. From flexible ways of working to benefits designed around you, we’re committed to helping you feel comfortable, valued, and able to thrive.

We believe great work happens when people feel connected — to each other, to our purpose, and to the communities we serve. That’s why we encourage balance, invest in wellbeing, and focus on growing and improving together.

Why join us?

There are plenty of reasons to build your career with Principality:

• Flexible hybrid working – Our award-winning approach gives you the flexibility to work from home and from the office. Collaboration matters to us, so you’ll spend at least 8 days per month based in our Cardiff office.
• A truly inclusive workplace – Proudly named in the 2025 Inclusive Top 50 UK Employers List, ranked 27th, recognising our ongoing commitment to inclusion and belonging.
• Customer excellence you can be proud of – Winners of Double Gold Awards for Customer Satisfaction at the Fairer Finance Awards 2025 for both Savings and Mortgages.
• Engaged, supported colleagues – Our colleague engagement scores consistently exceed 85%, reflecting a positive and supportive culture.
• Wellbeing at the heart of what we do – Our Belong benefits package is designed to put our people first, supporting your physical, mental, and financial wellbeing.

These achievements reflect more than awards — they represent our long-term commitment to creating a workplace where colleagues feel supported and customers feel cared for.

When it comes to belonging, there truly is no place like Principality.

We are looking for a Lead Platform Engineer to provide senior technical leadership within our IT function.

This role is focused on technical leadership, standards, and execution. You will work hands‑on as part of a multi‑disciplinary team, designing and evolving platforms that enable teams to build, test, and deploy software securely, reliably, and with minimal friction.

You will play a key role in shaping how platform capabilities are designed, adopted, and evolved, acting as a technical authority and senior escalation point while contributing directly through engineering work.

What you’ll be doing

Technical leadership & standards

• Provide technical leadership for platform engineering, setting and evolving standards, patterns, and “paved roads” for software delivery.
• Lead by example through hands‑on engineering, architectural input, and technical decision‑making.
• Act as a senior escalation point for complex platform, CI/CD, and environment‑related issues.

Platform engineering (internal product mindset)

• Design, build, and operate platform capabilities as an internal product, with a strong focus on developer experience, self‑service, and repeatability.
• Provide shared tooling, workflows, and automation that reduce cognitive load for delivery teams.
• Continuously improve the platform based on adoption, feedback, and delivery outcomes.

Cloud, DevOps & automation

• Design and operate CI/CD pipelines, deployment automation, and environment management across the delivery lifecycle.
• Provide strong technical leadership in Azure, ensuring platform capabilities are secure, scalable, and aligned to enterprise standards.
• Define and evolve platform capabilities using Infrastructure as Code, preferably Terraform, to ensure consistency, auditability, and resilience.

Roadmap & collaboration

• Contribute to the platform engineering roadmap, balancing immediate delivery needs with longer‑term platform evolution.
• Work closely with delivery teams, infrastructure, security, and governance functions to ensure the platform enables fast, safe change.

What you’ll bring
We’d love to hear from you if you have:

• Strong experience operating as a senior or lead platform / DevOps / SRE engineer.

• Proven ability to lead through execution, making sound technical decisions and unblocking teams.
• Hands‑on experience with Azure in an enterprise environment.
• Strong experience designing and operating CI/CD and DevOps tooling.
• Practical experience with Infrastructure as Code, ideally Terraform.
• Experience supporting the full software delivery lifecycle, including non‑functional requirements such as security, availability, scalability, and reliability.
• Experience contributing to or building internal developer platforms, self‑service environments, or paved roads.
• Exposure to OutSystems and/or MuleSoft (desirable but not essential).
• Experience working in regulated financial services or enterprise environments (desirable not essential)

If you’re excited about leading by example and building pragmatic, high‑impact platforms that help teams deliver great software faster and safer, we’d love to hear from you.

We reserve the right to close this vacancy early should we receive a high volume of applications.

If you have any questions in relation to this role, please contact the recruitment team at -recruitment@principality.co.uk

‘’We are passionate about creating an inclusive workplace where diversity is celebrated and where colleagues feel a sense of belonging’’ Nigel Taylor – Head of Brand, Impact & Communication. But don’t just take our word for it, see what our colleagues say about working here too; Careers (principality.co.uk)

Read all about us - Principality Building Society: Posts | LinkedIn