Full Stack Developer C# London, Hybrid

  • Source Technology Limited
  • 23/07/2026
Full time Information Technology Telecommunications SQL Testing

Job Description

Senior C# Developer - London

Industry: Financial Services Location: London, United Kingdom (Hybrid) Salary: £85k to £120k - based on experience and skillset + bonus + EOT + benefits

What you'll be doing
  • Develop, maintain and enhance client facing tools for trading and risk management across commodities and FX products.
  • Collaborate closely with front office, risk, operations and technology teams to automate workflows and improve execution efficiency.
  • Design and implement real time analytics and reporting systems, including dashboards and operational monitoring.
  • Integrate data sources (market data, positions, risk metrics) into scalable services and visualisation layers.
  • Optimise performance and reliability of in-house applications, including low latency components and data pipelines.
  • Ensure systems are resilient, secure, and compliant with operational and governance standards.
  • Contribute to code quality through peer reviews, testing practices, documentation and continuous improvement.
The skills we're looking for
  • 5+ years' development experience within a hedge fund, investment bank, or trading firm.
  • Strong programming skills in C# and experience delivering production grade services.
  • Good understanding of financial markets, especially commodities or FX.
  • Proven experience building low latency tools, data pipelines, or trade support systems.
  • Familiarity with market data feeds, pricing models, and position management systems.
  • Knowledge of databases (SQL) and designing efficient data access patterns.
  • Experience with cloud infrastructure (Azure preferably).
  • Familiarity with DevOps practices and CI/CD pipelines.
  • Understanding of systematic trading frameworks or risk analytics.
  • Excellent communication skills and ability to operate effectively in a fast paced front office environment.
  • Strong problem solving mindset and attention to detail.
  • Exposure to energy markets, metals, or emerging market FX is a plus.
What we offer
  • Employee Ownership Trust participation, with potential for tax free discretionary cash bonuses.
  • Annual discretionary performance bonus.
  • Extensive private health benefits, including medical, dental, critical illness, life assurance, and income protection.
  • 25 days' holiday plus bank holidays.
  • Pension scheme to support your future.
  • Salary sacrifice options including electric vehicle leasing and cycle to work scheme.
  • Discounted gym membership and season ticket loans.
  • Ongoing support for professional development.
  • Employee Recognition Awards and Length of Service rewards.