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# C# developer

- **Company:** Lorien
- **Location:** United States
- **Contract:** Permanent contract
- **Skills:** ASP.NET, .NET Framework, C Sharp (Programming Language), Software Design Patterns, Internet Information Services (IIS), Python (Programming Language), Nunit, Systems Development Life Cycle, Software Engineering, Web Services, Teamcity, Code Restructuring, Jenkins
- **Published:** August 18, 2026
- **Apply:** https://computerjobs.com/us/en/mob/job/58158B34D80ABB1C49

## About the Role

* Strong, hands-on C# developer with a proven track record of delivery on live, business-critical systems
 * Detailed knowledge of the systems you've built - not just used - including having shaped their architecture and design
 * Strong communication and analytical skills; comfortable interacting directly with business stakeholders
 * A flexible, responsive approach to work, suited to a Tier 1 support environment
 * Solid grounding in good software design patterns and practices
 * Full SDLC experience

Technical Environment

 * C#/.NET 8
 * IIS-based REST/ASP.NET web services
 * NUnit
 * TeamCity, Jenkins
 * Python

## Description

We're looking for a strong C# developer to join a Front-to-Back FX technology team, building and improving the systems traders and business users rely on every day for deal capture and post-trade processing. This is a hands-on development role within a small team supporting Tier 1, business-critical systems - the kind where your code is in production affecting live trading activity, not sitting in a backlog.

You'll be developing new functionality to support deal capture and post-trade workflows, refactoring existing code to improve reliability and releasability, and working closely with traders and front-line support to respond quickly when things need fixing or changing.
What You'll Be Doing

 * Developing new functionality for business users, focused on deal capture and post-trade activity
 * Building and maintaining REST/ASP.NET web services and the applications and UI layers that sit on top of them
 * Refactoring and improving the releasability of existing systems
 * Responding quickly to changing trader requirements and issues escalated from front-line support
 * Owning the full software development life cycle for your work, from design through to deployment
 * Contributing directly to the architecture and design decisions of the systems you work on
 * Working confidently and directly with business users to understand and shape requirements


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