Principal Software Engineer

.Net, PHP, Umbraco, Drupal

About The Role A Principal Engineer is the most senior technical role in manifestos engineering team , providing leadership when it matters most: whether shaping a new client opportunity, designing complex architecture or resolving a critical live issue.

You will work across our client estate rather than being embedded in a single project, moving between platforms and codebases as the work demands. You will hold technical authority across our core stacks, .NET and Umbraco, PHP and Drupal, alongside the cloud infrastructure and hosting platforms that sit underneath them.

The role has three sides to it. You help shape technical solutions through discovery, technical qualification and solution design. You steer delivery on our most complex projects, setting the architectural direction and lifting the standard of the engineering around you. And you are the person who can drop into an unfamiliar codebase under pressure and diagnose what is actually happening, giving both our teams and our clients confidence at the moments that matter most.

We build digital products for charities, non-profits and membership and visitor organisations. Our clients are purpose-led, often working with constrained budgets, and the platforms we build carry donation journeys, supporter data and services people depend on. Technical decisions here have real consequences, and this role exists to make sure we get them right.

Responsibilities Provide technical authority across our client estate, spanning multiple platforms, hosting environments and codebases.

Shape technical solutions for new business, from initial qualification through discovery to solution design and estimation.

Lead the architecture of our largest and most complex client projects.

Act as the senior technical escalation point for live incidents and complex problems, across multiple stacks.</...