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Principal Software Engineer

Principal Software Engineer

Remote

United kingdom

£ 150,000 /year

Senior

Full Time

06-02-2026

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Skills

TypeScript Architecture node.js

Job Specifications

Principal Software Engineer – Node / TypeScript

£130,000 – £150,000

100% Remote – UK / Europe

Tech stack: Node.js, TypeScript, Cloud, Distributed Systems, APIs, Async Processing

Immersum is supporting a bootstrapped CyberSecurity SaaS company specialising in vulnerability scanning as they look to hire a Principal Software Engineer. With a team of just six, they are building a security-focused cloud platform that helps organisations continuously reduce risk across their digital estate. Fully remote and engineering-led, the business prioritises clean architecture and long-term technical quality.

Who They’re Looking For

A T-shaped engineer with deep Node.js and TypeScript expertise who enjoys owning complex systems, influencing technical direction, and staying hands-on.

The Role

• Design and evolve backend services supporting APIs and asynchronous workflows

• Own architecture decisions focused on scalability and reliability

• Set high standards for code quality, testing, and observability

• Address performance, reliability, and technical debt

• Contribute to technical strategy while remaining hands-on

What You’ll Bring

Strong production experience with Node.js and TypeScript

Background in distributed systems and event-driven architecture

Experience designing multi-consumer APIs

Solid understanding of cloud environments, data, and reliability

Clear communicator with principal-level impact

Why Join?

Mission-critical product with real engineering impact

Senior, low-ego team with high ownership

Fully remote, high-trust environment

Genuine influence over technical direction

Please note this role does not offer sponsorship.

About the Company

It's time to redefine the traditional approach to recruitment, talent acquisition and business development within the tech industry. Our mission is to provide a personalised and partnership-driven experience that ensures the perfect fit for your career or business needs. Through collaboration and immersing ourselves within growing tech companies, we foster deeper relationships. Our range of offerings say goodbye to the one-size-fits all model. Connect with us to explore how our Engage, Embed and Immerse offerings can unloc... Know more