Principal Software Engineer | AI‑Driven SaaS Architect

United States Digital Space LLC; Milton Keynes; Hybrid; GBP 75,000 - 85,000; Full time

Benefits offered by this job

Healthcare package

Life assurance

Holiday trading

Retail discounts

Gym benefits

Professional development

Collaborative culture

Job summary

United States Digital Space LLC in Milton Keynes is seeking a Principal Software Engineer to join a growing SaaS organisation, offering hands-on leadership and influence over technical direction.

Reporting to the CTO, you will design scalable, secure software, lead architectural decisions, mentor engineers, and collaborate with Product and stakeholders to deliver cloud-native solutions.

Qualifications

• Extensive experience designing and delivering high-quality software in modern engineering environments.
• Strong commercial experience with C#, ASP.NET, Azure, React and REST APIs.
• Experience designing scalable, secure and maintainable software architectures.
• Strong understanding of cloud-native application development and Azure services.
• Experience influencing technical strategy and architectural decision making.
• Knowledge of secure software development practices within SaaS or regulated environments.

Responsibilities

• Design scalable, secure and maintainable software solutions.
• Lead architectural decisions balancing innovation, performance and long-term sustainability.
• Drive engineering best practice, coding standards and software quality across teams.
• Collaborate with Product Managers and stakeholders to translate business requirements into robust technical solutions.
• Mentor and coach engineers to raise technical capability across the team.
• Champion modern software engineering practices and AI-powered development tools.

Skills

C#

ASP.NET

Azure

React

REST APIs

Software Architecture

Job description

United States Digital Space LLC in Milton Keynes is seeking a Principal Software Engineer to join a growing SaaS organisation, offering hands-on leadership and influence over technical direction.

Reporting to the CTO, you will design scalable, secure software, lead architectural decisions, mentor engineers, and collaborate with Product and stakeholders to deliver cloud-native solutions.