C# / .NET Trading Systems Engineer

Spectrum IT Recruitment; Greater London; On-site; GBP 55,000 - 85,000; Full time

Job summary

Spectrum IT Recruitment is seeking a Software Engineer to contribute to the development and enhancement of in-house trading and research systems. You will work on greenfield and existing projects, building scalable, high-performance systems that support real-world trading strategies.

You will primarily work within a C# / .NET / SQL Server / ASP.NET ecosystem, developing reliable and maintainable applications.

Qualifications

• BSc (or higher) in Computer Science or a related discipline.
• Strong experience with C# and the .NET platform.
• 2–5 years of professional software development experience.
• Experience with SQL Server, Oracle, or equivalent relational databases.
• Good understanding of object-oriented design principles.
• Experience building and maintaining production applications.
• Strong communication skills in English.
• Analytical mindset with attention to detail.
• Experience with multi-threaded or concurrent programming.
• Exposure to network programming (TCP/UDP).
• Experience with Git or other version control systems.
• Familiarity with Windows-based development environments.
• Interest in or exposure to financial markets.

Responsibilities

• Design, develop, and maintain applications using C# and .NET
• Contribute to system architecture and technical design discussions
• Build scalable systems to support automated trading and research
• Develop and optimise database solutions (SQL Server or equivalent)
• Improve performance, reliability, and automation across systems
• Participate in code reviews and maintain high standards of quality
• Collaborate with researchers and traders to deliver robust software solutions
• Contribute to continuous improvement of development processes and tooling

Skills

C#

.NET

English communication

Analytical mindset

Multithreaded programming

Object-oriented design

Production applications

Trading/finance exposure

Education

BSc in Computer Science

Tools

SQL Server

Oracle

Git

Windows development

Job description

Spectrum IT Recruitment is seeking a Software Engineer to contribute to the development and enhancement of in-house trading and research systems. You will work on greenfield and existing projects, building scalable, high-performance systems that support real-world trading strategies.

You will primarily work within a C# / .NET / SQL Server / ASP.NET ecosystem, developing reliable and maintainable applications.