Principal Engineer (.NET)

London or Coventry | Hybrid (2 Days per Week) | Permanent

Shape the future of engineering. Influence technology at scale.

This is more than a Principal Engineer role.

It's an opportunity to define engineering strategy, influence technology decisions across multiple teams, and help build the next generation of enterprise platforms used by millions of customers.

We're looking for an exceptional Principal Engineer (.NET) who combines deep technical expertise with strategic vision. You'll be the technical authority behind large-scale engineering initiatives, driving innovation, modern architecture and engineering excellence across the organisation.

If you're passionate about modern software engineering, cloud-native architecture, AI, DevOps and mentoring high-performing teams, this is the role where your ideas will genuinely shape the future.

What You'll Be Doing

As a Principal Engineer, you'll sit at the heart of the engineering leadership community, providing technical direction, influencing strategy and ensuring engineering teams deliver scalable, secure and resilient solutions.

You'll:

• Define engineering strategy, architecture standards and technology roadmaps.

• Lead the design of large-scale, cloud-native distributed systems.

• Champion engineering excellence through DevOps, CI/CD, automation and modern software delivery practices.

• Drive innovation by evaluating emerging technologies, AI capabilities and engineering frameworks.

• Partner with senior engineering leaders, architects and stakeholders to influence technical direction.

• Lead architectural decisions for high-availability, enterprise-scale platforms.

• Promote Secure-by-Design principles and embed security throughout the software lifecycle.

• Introduce observability best practices including monitoring, logging, SLI/SLO and operational excellence.

• Mentor Staff Engineers, Senior Engineers and development teams, helping to grow the next generation of technical leaders.

• Foster an engineering culture built around collaboration, continuous improvement and innovation.

What You'll Bring

We're looking for an experienced technology leader who thrives on solving complex engineering challenges and influencing technical direction across multiple teams.

Technical Expertise

You'll have deep hands-on experience with many of the following technologies:

• ASP.NET Core

• C#

• Web API

• Entity Framework

• Microsoft Azure

• Kubernetes

• Kafka

• Microservices Architecture

• MongoDB

• Cloud Integration

• JavaScript

• TypeScript

• Terraform

You'll also bring:

• Extensive experience designing scalable, resilient distributed systems.

• Strong knowledge of modern software architecture and cloud-native engineering.

• Expertise in defining engineering standards, governance and technical best practices.

• Practical experience applying AI and Generative AI tools to improve engineering productivity and software delivery.

• A passion for automation, DevOps and continuous delivery.

Leadership Experience

You'll be someone who naturally influences others and enjoys helping engineering teams succeed.

We're looking for someone with experience:

• Operating as a Principal, Lead or Staff Engineer within a modern engineering organisation.

• Influencing engineering strategy across multiple teams or business domains.

• Working alongside Engineering Managers, Architects and Technical Leaders.

• Mentoring engineers at every stage of their careers.

• Communicating technical concepts clearly to both technical and non-technical stakeholders.

What Makes You Stand Out

Ideally, you'll also have:

• A strong Agile mindset.

• Experience building collaborative engineering communities.

• A data-driven approach to technical decision making.

• A passion for innovation and continuous improvement.

• The ability to balance technical excellence with commercial outcomes.

Why Join?

You'll become part of a collaborative engineering culture where innovation is encouraged, experimentation is supported and technical excellence is recognised.

This is a role where you'll have genuine influence over architecture, engineering standards and technology strategy while working with some of the latest cloud, AI and platform technologies.

If you're looking for an opportunity to lead from the front, solve complex technical challenges and help shape the future of enterprise engineering, we'd love to hear from you.

Location: London or Coventry

Working Pattern: Hybrid – 2 days per week onsite

Employment Type: Permanent

Ready to Make an Impact?

If you're an experienced Principal Engineer looking for your next challenge, we'd love to speak with you.

Apply today or contact us for a confidential conversation to discover how this opportunity could take your career to the next level.
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