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Jobs / C/C++ Engineer in United Kingdom
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Outside Spy·1 day ago
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C# Developer/£750/day | Outside IR35 | 12 month+ | Largely Remote/London at CipherTek Recruitment, ec2a, £600-£775 per day

London, United KingdomRemoteMid · 2-5 years₹63,000 – ₹81,375/yr · est.C/C++ Engineer

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Must-have skills for this role

  • c#
  • .net
  • event sourcing
  • .net 8

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What you'll do

  • Designing and developing scalable Back End services
  • Contributing to the Angular Front End where required
  • Working on complex, distributed systems
  • Working across an existing complex codebase

What they're looking for

  • Excellent C#/.NET development experience
  • Strong .NET 8 knowledge
  • Previous commercial Event Sourcing experience - essential
  • Strong understanding of multithreading, concurrency and asynchronous programming
  • Experience building large-scale distributed systems
  • Strong software engineering and system design fundamentals
  • Comfortable working across an existing complex codebase

Nice to have

  • Previous experience within investment banking/capital markets
  • Experience working with structured products, derivatives or similar Front Office systems

Summarised by NextRaise from the employer’s description, which follows in full below.

Full description from employer

Senior C# Developer - Investment Banking

£750/day | Outside IR35 | 12-month rolling contract | Largely Remote

If you're a strong C# engineer with genuine Event Sourcing experience and interested in a long term banking project, get in touch

I'm working with a leading investment bank looking for a strong Senior C# Developer to join a long-term project building and enhancing a large-scale Structured Notes platform.

This is a hands-on engineering role with approximately 80% Back End C#/20% frontend, working on complex, distributed systems.

The role:

You'll be working across a modern .NET platform, designing and developing scalable Back End services while contributing to the Angular Front End where required.

The environment involves large-scale distributed systems, asynchronous processing, Multithreading and event-driven architecture.

Core technical requirements:

Excellent C#/.NET development experience

Strong .NET 8 knowledge

Previous commercial Event Sourcing experience - essential

Strong understanding of multithreading, concurrency and asynchronous programming

Experience building large-scale distributed systems

Strong software engineering and system design fundamentals

Comfortable working across an existing complex codebase

Frontend - around 20% of the role:

TypeScript

Angular

RxJS

Redux

SignalR

Wider stack:

MongoDB | Solace | GitHub | TeamCity | Cypress | JIRA

Previous experience within investment banking/capital markets is highly desirable, particularly experience working with structured products, derivatives or similar Front Office systems.

This is a 12-month rolling contract with strong potential for longevity.

?? £750/day

?? Outside IR35

?? Largely remote - current office attendance is optional

?? Investment Banking

If you're a strong C# engineer with genuine Event Sourcing experience and interested in a long-term banking project, get in touch

Company

OS
Outside Spy
London, United Kingdom

Company facts come from this company's own listings. We only show what the postings themselves carry.

Sourced from Outside Spy's careers site·first seen 22 Sept 2026·last verified 22 Sept 2026·How we source jobs

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