Senior Fullstack Engineer
First seen by Alion on Sep 23, 2026.
Senior Fullstack Engineer | React, TypeScript, C#, Python | Fully Remote (UK) | Up to £85,000
SC eligibility preferred, not essential
No sponsorship available
What you'll be building
My client is building a data platform that turns live global events into risk intelligence. You'll join a small engineering team and help shape the platform's next phase. In a team that size, you'll see the impact of your work directly.
The work
Designing and building pipelines that pull in data from internal and third-party sources
Building the backend services and APIs that power the platform
Turning complex, fast-moving information into clear frontend features and data visualisations
Putting LLMs to work on real problems: enrichment, summarisation, search and discovery
Owning what you build, from first design through to production
What they're looking for
Commercial experience as a senior fullstack engineer in production environments
React and TypeScript
Backend experience in C# and/or Python
Cloud experience. Azure is ideal, but strong AWS or other cloud experience is fine if you can pick up a new platform.
Experience building and integrating APIs and data pipelines
UK-based and eligible for background screening
Nice to have
Experience with LLM APIs
Data visualisation libraries
An interest in geopolitics, security or world events