Principal Software Engineer

Harrington Starr; Remote; GBP 70,000 - 90,000; Full time

Job summary

A leading Global Payments Technology company in the United Kingdom is seeking a Principal Software Engineer for a fully remote, permanent position. This role offers a unique opportunity to influence technical and architectural direction while engaging in hands-on coding. Key responsibilities include defining technical frameworks and mentoring teams. The ideal candidate will have over 10 years of experience in enterprise architecture and a strong background in .NET and SaaS. A competitive salary and benefits package are offered.

Benefits

Flexible working arrangements

Career progression opportunities

Work on complex, high-performance systems

Qualifications

• 10+ years’ experience in enterprise architecture and software engineering.
• Proven expertise in .NET with strong SaaS and API platform experience.
• Hands-on track record designing highly scalable, high-performance systems.
• Strong leadership, mentoring, and stakeholder management skills.

Responsibilities

• Define and maintain the company’s technical and architectural direction.
• Provide leadership and mentorship across multiple engineering teams.
• Drive enterprise-level design decisions, ensuring scalability and resilience.
• Contribute directly to coding activities in support of key deliverables.
• Monitor emerging technologies, influencing long-term strategic decisions.

Skills

Enterprise architecture

.NET

SaaS

API platform experience

Leadership

Mentoring

Stakeholder management

Job description

Principal Software Engineer

Fully Remote | Permanent | Competitive Salary + Benefits

Harrington Starr has partnered with a leading Global Payments Technology company who are seeking to hire a Principal Software Engineer to join their senior engineering leadership team. This is a rare opportunity to combine hands‑on development with strategic influence, guiding architecture decisions and shaping the technical vision for a global, real‑time payments platform.

Key responsibilities

• Define and maintain the company’s technical and architectural direction.
• Provide leadership and mentorship across multiple engineering teams.
• Drive enterprise‑level design decisions, ensuring scalability and resilience.
• Contribute directly to coding activities in support of key deliverables.
• Monitor emerging technologies, influencing long‑term strategic decisions.

Benefits of the role

• Fully remote working with flexible arrangements.
• Senior leadership role with influence over enterprise‑wide architecture.
• Opportunity to balance hands‑on coding with strategic direction.
• Work on complex, high‑performance systems at global scale.
• Career progression in a fast‑growing international technology business.

Key skills required

• 10+ years’ experience in enterprise architecture and software engineering.
• Proven expertise in .NET with strong SaaS and API platform experience.
• Hands‑on track record designing highly scalable, high‑performance systems.
• Strong leadership, mentoring, and stakeholder management skills.

For any additional questions, please contact me via LinkedIn or through email - [e-mail].

If you feel this role is the right one for you, please apply below!