Principal Engineer

Harrington Starr; Newcastle upon Tyne; Hybrid; GBP 99,000 - 121,000; Full time

Benefits offered by this job

Hybrid and flexible working

Private Medical Insurance and Life Ins

Pension and Employee Assistance

25 days annual leave

Job summary

Harrington Starr is partnering with a leading financial technology firm to hire a Principal C# Software Engineer in Newcastle. The role focuses on real-time trading technology, platform modernisation and re-architecture, combining hands-on engineering, architecture and mentoring.

The successful candidate will shape technical strategy, lead platform development through to production, and drive improvements in automation, observability, and CI/CD while collaborating with Engineering, Product and

Qualifications

• Must have strong C#/.NET software engineering experience.
• Deep understanding of real-time and low-latency architectures.
• Experience leading modernization, migration or re-architecture programmes.
• Experience with cloud-native architectures, APIs, event-driven systems and CI/CD.

Responsibilities

• Shape the technical roadmap and platform re-architecture strategy.
• Lead platform development through to production and improve scalability, resilience and performance.
• Drive improvements across automation, observability, CI/CD and developer productivity.
• Partner with Engineering, Product and Operations to deliver practical technical solutions.
• Mentor engineers and champion engineering standards, best practices and continuous improvement.

Skills

C#/.NET

Real-time low-latency

Technical leadership

CI/CD

Cloud-native architectures

Event-driven systems

Financial markets experience

Job description

Salary: Up to £110,000 + Bonus & Benefits

Harrington Starr is partnering with a leading financial technology firm to hire a Principal C# Software Engineer in Newcastle.

This is a senior technical leadership role focused on real-time trading technology, platform modernisation and re-architecture, combining hands-on engineering, architecture and mentoring.

The Role:

• Shape the technical roadmap and platform re-architecture strategy
• Lead platform development through to production and improve scalability, resilience and performance
• Drive improvements across automation, observability, CI/CD and developer productivity
• Partner with Engineering, Product and Operations to deliver practical technical solutions
• Mentor engineers and champion engineering standards, best practices and continuous improvement

What We're Looking For:

• Strong C#/.NET software engineering experience
• Strong understanding of real-time and low-latency architecture
• Experience leading modernisation, migration or re-architecture programmes
• Experience with cloud-native architectures, APIs, event-driven systems and CI/CD
• Financial markets experience, ideally across electronic trading, OTC derivatives, fixed income, FX or similar, with strong technical leadership skills
• Up to £110,000 base salary + discretionary bonus
• 25 days annual leave + bank holidays
• Hybrid and flexible working
• Private Medical Insurance and Life Insurance
• Pension and Employee Assistance Programme

If you’re a Principal-level C# engineer looking to shape architecture, modernise complex platforms and work on real-time financial technology, we’d love to hear from you.