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Harrington Starr Logo Harrington Starr · IT - Software Development

Senior C# Engineer

United Kingdom, London 80000.00 - 120000.00 GBP / Year · Job Posted May 10, 2026
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Job Description

We’re partnered with an innovative proprietary trading firm in the City of London that is hiring a Senior C# Software Engineer. You’ll work on greenfield projects, cutting-edge technology, and play a key part in shaping systems that directly influence trading performance.

Job Responsibility

  • Develop and maintain high-performance trading applications in a C#/.NET/SQL Server environment
  • Take ownership of new, greenfield projects, influencing design and implementation from the start
  • Collaborate with a talented team of engineers and researchers in a supportive environment
  • Continuously innovate and improve tools, processes, and systems
  • Deliver solutions that directly contribute to trading success and business growth

Requirements

  • Strong background in C# and the .NET platform (working with the latest versions)
  • Database knowledge (SQL Server, Oracle, or equivalent)
  • Degree in Computer Science or related subject
  • Fluent in English with excellent communication skills
  • Detail-oriented, with a drive to deliver high-quality solutions

What we offer

  • Competitive salary with a strong benefits package
  • Work on greenfield projects where your ideas genuinely shape the outcome
  • Exposure to the latest .NET technologies in a high-performance trading environment
  • Clear opportunities for career growth and progression
  • Collaborative, non-corporate culture where innovation and creativity are encouraged
  • Great work-life balance supported by wellness perks, healthcare, and team socials
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