C# React Full-Stack Developer
On site
London, United Kingdom
£ 850 / day
Freelance
17-04-2025
Job Specifications
Senior .NET / React Developer - Global Markets
Inside IR35 Contract Role - London - Up to £850 per day
About the Role:
We are currently seeking an experienced Senior .NET Developer to join a leading global financial institution in London. This is a 6-month contract with strong likelihood of extension, working on critical desktop applications within their Global Markets technology team.
Key Responsibilities
Enhance and maintain two business-critical desktop applications:
A desktop application launcher/management system built with WPF and .NET
A background business alerting application that processes system events
Develop new React admin screens as part of extending these applications to new business units
Participate in architecture improvements to support broader deployment
Work closely with a small, collaborative development team
Technical Requirements
Strong experience with .NET development and React
Familiarity with event processing systems and messaging architectures
Ability to work across both frontend and backend development
The Ideal Candidate Will Have
Strong understanding of event-driven architectures
Experience with asynchronous programming and multi-threading
Exposure to financial services applications (though deep domain knowledge is not required)
Ability to work independently in a small team environment
Work Environment
Hybrid working arrangement: 50% office time (3 days one week, 2 days the next)
Small, collaborative team of 3 developers based in London
Contract Details
Day rate: Up to £850 per day
Duration: 6 months initial term with expected extensions
Location: London office
If you're an experienced .NET developer looking for a varied and technically challenging role within financial technology, we'd love to hear from you.
About the Company
Caspian One are an international professional services company. We solve technology-driven, resource-based and project-delivery challenges that demand speed, scale and commercial flexibility. Empowering individuals and organisations to optimise their full potential. Put simply – we deploy specialist resources and niche technology teams to deliver projects in ways that best suit the needs of our clients. These SMEs are working to decommission, migrate, build, and implement tech that gives our clients the competitive edge. ... Know more
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