We are seeking an experienced Principal Engineer (.NET) to provide technical leadership across large‑scale, cloud‑native platforms used by millions of customers.

This is a hands‑on leadership role for a senior technologist who can set engineering direction, solve complex architectural challenges, and raise engineering standards across multiple teams, while remaining close to the code.

You will work in a collaborative, inclusive engineering environment that values modern practices, experimentation, and evidence‑based decision making.

• London / Coventry
• Hybrid working model
• Permanent role - up to £100,000 per annum!
• British citizenship / EU passport / ILR required

Key Responsibilities

• Define and evolve engineering strategy, standards, and best practices across your domain
• Set technical direction and architecture principles for complex, distributed systems
• Lead by example through deep hands‑on expertise, supporting senior engineers and delivery teams
• Design and oversee large‑scale, highly available, cloud‑native systems
• Provide expert guidance on technical risk, impact assessment, and prioritisation
• Drive DevOps culture, CI/CD automation, and engineering excellence
• Implement and improve observability (monitoring, logging, SLO/SLI frameworks)
• Own secure‑by‑design practices, including vulnerability management and risk remediation
• Leverage AI and intelligent automation to modernise platforms and improve developer productivity
• Mentor engineers at all levels and contribute to a strong engineering community of practice
• Evaluate emerging technologies, lead PoCs, and perform fitment analysis where appropriate

Essential Skills & Experience

Technical Excellence

• Expert, hands‑on experience with ASP.NET Core, WebAPI, C#, Entity Framework
• Strong cloud experience, preferably Microsoft Azure
• Proven delivery of microservices and distributed systems at scale
• Experience with Kubernetes, Kafka, and containerised workloads
• Working knowledge of MongoDB and cloud integration patterns
• Infrastructure as Code using Terraform
• Front‑end literacy with JavaScript / TypeScript
• Strong understanding of software architecture, scalability, resilience, and performance
• Practical experience applying generative AI tools responsibly within engineering workflows

Leadership & Influence

• Experience operating at Senior / Principal Engineer level
• Ability to influence engineering strategy across multiple teams or domains
• Comfortable working with senior engineering leaders and stakeholders

Desirable Experience

• Strong advocate for Agile delivery and modern engineering practices
• Data‑driven approach to decision making and trade‑off analysis
• Passion for mentorship, innovation, and continuous improvement

Why Join

• Work on large‑scale, high‑impact systems with real‑world reach
• Influence technology direction at a strategic level
• Join a supportive, inclusive engineering community
• Opportunity to lead, mentor, and shape modern engineering standards

If this opportunity aligns with your experience and interests, please get in touch to discuss further.