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Principal Engineer

2 months ago

London, United Kingdom Moonpig Group Full time

What you’ll be doing:



A Principal Engineer is the highest level a single contributor can achieve at Moonpig. They drive the same level of impact and influence as a Director and because of this, it’s a very highly regarded role. At this level you are able to set company wide technical principles and processes whilst supporting their adoption through proper engagement and collaboration. You are able to mentor and coach Senior Engineers and actively work to advocate the Moonpig brand externally. It’s an exciting role with plenty of opportunities to do great things.



As a Principal Engineer, we have the following three big expectations:



  • Defining technical principles and practices. As a Principal, simply writing good code and advocating the practice of good coding is not enough. You are responsible for defining the patterns and practices that help us build a world class engineering team, able to deliver quickly at the highest standards. This will require you to work with other principals and engineers at all levels in making your ideas a reality. In essence you’ve done this before. How do we avoid the mistakes and do it better.
  • Architecture is a competency, not a function. At Moonpig, we do not have architecture as a separate function. Instead, we believe that architecture is a skill that everyone should grow, and Principals are the pinnacle representation of that skill. We expect you to take a systems thinking approach to problem solving and provide architectural input where needed. There is no ivory tower thinking here either. You need to collectively drive decisions and work with engineers in delivering features and solutions. You will be writing code, and plenty of it.
  • Culture and advocacy. Engineering is so much more than just coding. As a Principal Engineer you are the pinnacle of engineering at Moonpig and as such, you represent what we are capable of. Because of this, there is a high expectation around Principal Engineers to be great advocates of Moonpig either internally or externally. If internal, you should be comfortable speaking to groups, having high level technical conversations and supporting a strong growth culture through advocating, training and core beliefs. If external, you should be comfortable representing Moonpig at external meetups, events and conferences. Blogging should be natural and what we put forward to the technical community should be insightful, forward thinking and demonstrate our technical capabilities.


Overall, as a Principal Engineer, your value comes from more than just writing code. It’s around impact, influence and your ability to drive change.



You’ll be a good fit for the role if you:



  • Experienced in Node.js, but you’re happy to work across multiple languages and ecosystems. We use TypeScript so knowledge/experience in this would be a bonus
  • Have experience with CI/CD and own your code from build through deployment to production support and monitoring
  • Familiar with scalable, serverless system design and the positives and trade-offs that come with it
  • Passionate about building robust and performant cloud/serverless applications, with a focus on user experience and business growth.
  • Enjoy being part of a full-stack, cross-functional team, working closely with people of different specialisms within your team and across the business
  • Have an awareness of web application and cloud security and will collaborate effectively with our internal security team
  • Keen to work with and help guide the technical roadmap of multiple teams, while also influencing across the engineering organisation as a whole, setting best practices
  • Able to lead through influence rather than mandate
  • You’re willing to challenge your own ideas; to try, fail, learn and repeat. You encourage others to do the same


Our Tech Environment



  • AWS, Serverless, Terraform, Node.js, TypeScript, C#, .NET Core, GraphQL, React
  • GitHub for SCM, CI/CD through GitHub Actions
  • Robust and performant cloud/serverless applications, with a focus on user experience and business growth
  • Full-stack, cross-functional teams owning the whole software development lifecycle from discovery to delivery.


We don’t expect you to have experience with all of the technologies above. Some of our product teams use .Net Core and others use Node.js/Typescript, so if you have experience in either, along with cloud/serverless experience, please apply



How we get there:



  • Kanban
  • Jira / Confluence
  • Grafana and AWS Cloudwatch
  • Google Analytics
  • Clean Architecture
  • TDD
  • Pair Programming
  • Focus on experimentation to validate our hypothesis
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