Principal Engineer at Moonpig.com

We are Moonpig Group, an international leader in online gifting with brands including Moonpig, Greetz and Buyagift. Our scalable, data-rich platform powers rapid innovation across multiple markets, and we are now looking for a Principal Engineer to help shape the technical direction of the entire organisation.

Responsibilities

• Define and embed company-wide technical principles, patterns and practices that raise engineering standards and speed of delivery.
• Provide architectural guidance using a systems-thinking approach, collaborating directly with engineers to design and deliver solutions rather than operating from an ivory tower.
• Write production code across services and features while mentoring senior engineers and modelling best practice.
• Represent Moonpig externally through meetups, conferences and technical blogging, and internally through talks, training and culture-building initiatives.
• Influence the technical roadmap of multiple teams and the wider engineering organisation through leadership by example and persuasion.

Must-haves

• Senior-level experience building and operating large-scale systems, with a track record of setting technical direction that others follow.
• Hands-on experience with Node.js (or C# / .NET Core) and a willingness to work across both ecosystems.
• Proven ownership of code from build through CI/CD, deployment, monitoring and production support.
• Experience designing scalable, serverless architectures on AWS and an understanding of the associated trade-offs.
• Strong collaboration skills within full-stack, cross-functional teams and the ability to lead through influence rather than mandate.
• Fluency in English.

Nice-to-haves

• Experience with TypeScript, Terraform, GraphQL and React.
• Familiarity with clean architecture, test-driven development and pair programming.
• Previous external advocacy through blogging, speaking or open-source contributions.

Benefits

• Hybrid working with no mandatory office days and only occasional travel to London or Manchester.
• Flexible arrangements that recognise individual circumstances and commitments outside work.
• A supportive, values-driven culture with active employee-led committees focused on inclusion and belonging.