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C# Front Office Developer (New York City Metropolitan Area)

Posted yesterday

quanteam north america rainbow partners groupNew York (NY)

SENIORITY

Senior

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About the role

As the founding entity of RAINBOW PARTNERS, Quanteam is a consulting firm specialized in Banking, Finance, and Financial Services. Through our core human values – proximity, teamwork, diversity, excellence – our 1000 expert consultants, hailing from 35 different nationalities, collaborate across 13 international offices: Paris, Lyon, New York, Montreal, London, Brussels, Luxembourg, Geneva, Lisbon, Porto, Casablanca, Madrid and Singapore. Context: We are looking for a C# Developer to join a leading international financial institution's New York technology team, supporting front-office electronic trading. The group builds and maintains high-performance platforms across multiple asset classes — including US Rates, FX Flow, and Fixed Income pricing. The environment is trading-floor aligned, dynamic, and Agile-driven, with direct interaction with traders, quants, and sales.
Role:
  • Build scalable C#/.NET applications for pricing, risk, connectivity, and reporting
  • Enhance electronic trading workflows to improve performance and usability
  • Support real-time trading through close collaboration with front-office users
  • Contribute to modernization and migration of legacy components to new platforms
Tech Stack:
  • Core: C# / .NET (4.5+), OOP, performance-oriented development
  • Domain exposure: US Treasuries & IRS / FX Flow / Fixed Income pricing & risk
  • Additional: Python, SQL, Git, Agile / CI-CD
Nice to have: React / Angular Profile:
  • Solid C# / .NET development experience with strong OOP fundamentals
  • Knowledge of electronic trading systems and workflows
  • Exposure to Fixed Income, FX Flow, or Interest Rate products
  • Strong problem-solving ability and comfort in fast-paced trading environments
  • Proactive mindset and ability to collaborate closely with front-office stakeholders

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