Principle Engineer

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Salary: GBP
90000 - GBP
100000 per annum

Are you ready to step into a role where you can drive architectural excellence, solve complex engineering challenges, and influence technical direction at scale?

We’re looking for a Principal Software Engineer to join a high‑performing engineering function, playing a critical role in delivering scalable, cloud‑native fintech platforms that support a rapidly expanding digital product suite.

This is a senior individual contributor role for someone who thrives on deep technical problem‑solving, system design, and raising engineering standards across teams.

• Design and build scalable, distributed systems using .NET (C#)
• Define and evolve system architecture across AWS cloud environments
• Lead on complex technical challenges and system design decisions
• Ensure platforms are built for performance, scalability, security, and resilience

• Act as a go‑to technical expert within the engineering function
• Champion best practices, clean code, and modern engineering standards
• Contribute to architectural discussions and guide technical direction without line management responsibility
• Support and influence the wider engineering team through knowledge sharing and technical mentorship

• Contribute directly to coding, design, and delivery of key systems
• Work across the full lifecycle — from design through to deployment and optimisation
• Drive improvement across CI/CD, Dev Ops, and cloud‑native practices
• Collaborate closely with Product and Engineering teams to deliver high‑impact solutions

You are a highly experienced engineer with a passion for hands‑on development, architecture, and solving complex technical challenges.

• Extensive experience with .NET / C# in large‑scale, complex systems
• Strong hands‑on expertise with AWS cloud platforms (essential)
• Proven experience designing scalable, distributed and microservices architectures
• Deep understanding of APIs, system design, and integration patterns
• Strong experience within Dev Ops, CI/CD, and modern engineering practices
• Ability to influence technical direction through expertise rather than authority
• Experience with Docker, Kubernetes, or containerisation
• Knowledge of event‑driven systems and architectures
• Exposure to front‑end technologies (React / Angular)
• Experience with in fintech or regulated environments

• £90,000+ salary depending on experience
• Opportunity to shape architecture and engineering direction at scale
• Remain hands‑on while working on complex, high‑impact systems
• Work on cloud‑native fintech platforms with real‑world impact
• High level of technical autonomy and influence
• Strong engineering culture with a modern technology stack

If you’re looking for a role where you can stay deeply technical, influence architecture, and make a lasting impact without moving away from engineering, we’d love to hear from you.