Senior .NET Developer

Marcus Donald People
September 20, 2022
Home-based, United Kingdom
Job Type
£550 - £650 per day, Benefits: Inside IR35


Marcus Donald are currently looking for a Senior Dotnet Developer (C#) to join a popular Financial Trading company, to help our client improve their existing trading platform.

NOTE: Experience within the Financial services / Trading sector is NOT required.
This is NOT a Greenfield project. This is a bug fixing/improvements kind of a job. Mainly BAU.

* 100% Remote Working / Home Based *
** Inside IR35 / £550-£650 per day **

Senior Dotnet Developer (C#) – Pros of the Job/Company:

  • There is no pressure to deliver quickly
  • You will learn how a trading system works (from the kitchen)
  • You’ll be working on a distributed system
  • You’ll be working on a system where low latency is important - analysing latency and improving it
  • Opportunity to learn the trading domain
  • You’ll be working on a system that is handling 80,000 requests after throttling
  • Working on a core system - means that this position is stable and safe
  • Small, well-defined tasks

Senior Dotnet Developer (C#) – Cons of the Job/Company:

  • This is more a bug fixing/small improvements work
  • Working on a system that is not well understood
  • Working on a complex system
  • Lack of documentation
  • Often working on your own - you are the only person working on a given task

About the trading platform:
It is a complex distributed system comprised of over 100 separate components, exchanging asynchronous messages (and data) over web sockets and streams over web sockets. This system is not easy to understand for a majority of developers

Senior Dotnet Developer (C#) – Technical:

  • At least 4 years of C# language
  • Profound knowledge in .NET
  • Hands-on experience with Entity Framework, ASP.NET
  • Unit testing and mocking
  • Agile development experience

Senior Dotnet Developer (C#) – Desired:

  • Experience with AWS
  • Docker & Kubernetes

We haven’t to date been very successful in identifying the right person for this role therefore, I thought a direct and detailed approach, by way of including pros and cons would be helpful.

Should you want to discuss further prior to applying please email ( or connect on LinkedIn. FULL job description available to be digested further.

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