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Spectrum IT Recruitment (South) Ltd

Senior Full Stack Developer

Hybrid

London, United kingdom

£ 90,000 /year

Senior

Full Time

06-02-2026

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Skills

JavaScript C# TypeScript Problem-solving Architecture react Agile Recruitment .NET Mathematics

Job Specifications

Senior Full Stack Engineer - C#, .Net, TypeScript, JavaScript

Hybrid, 1-2 days near Liverpool Street
Up to £90,000 + bonus + benefits

If you enjoy solving complex engineering problems, learning from highly capable peers, and working on a product where your contribution genuinely matters, this is an opportunity to do exactly that.

We're hiring for a growing, well-funded SaaS business building a sophisticated, data-driven platform that helps organisations understand and manage complex information at scale. The company is in an early investment phase with strong growth ambitions, offering real scope for progression and the chance to help shape both the product and engineering direction. You'll be part of a bright, collaborative team of talented software engineers and academically strong problem-solvers who value clean design and thoughtful architecture.

The Role
As a Full Stack Engineer, you'll design and deliver features across a modern stack, working on scalable backend services and intuitive front-end applications that present complex data clearly.

Key Responsibilities:

Building full-stack features using C#, .NET and TypeScript/React
Developing scalable backend services for complex data workflows
Creating responsive, user-friendly interfaces
Exploring new technologies and contributing to technical improvements
Working collaboratively in an agile engineering environment

About You

Strong commercial experience as a Software or Full Stack Engineer
Solid experience with C# / .NET and modern JavaScript or TypeScript (React preferred)
Strong problem-solving ability and a collaborative mindset
A strong Bachelor's degree in Computer Science, Mathematics, or a related field is highly desirable

Why Join?

Technically challenging, data-driven SaaS product
Work alongside a highly capable and intellectually strong team
Excellent learning opportunities and clear progression as the company grows
Hybrid working, 1-2 days onsite near Liverpool Street
Salary up to £90,000 plus bonus and benefits

If you're looking for a role where you can learn quickly, tackle interesting technical challenges, and grow with an ambitious product business, hit apply !

Spectrum IT Recruitment (South) Limited is acting as an Employment Agency in relation to this vacancy.

About the Company

Spectrum IT Recruitment is a Software & Technology recruitment specialist formed in 2008 with the purpose of delivering customer driven services to the Software, Web and Technology sectors across the South of England. Established for 15 years, employing 30 staff and demonstrating year on year growth, Spectrum IT is one the UK's leading IT recruitment agencies with a strong brand name and a reputation of professionalism and integrity. Our success is built on strong moral values and providing first class customer service t... Know more