C# Developer – Electronic Trading - NEW YORK in FRANCE

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 850 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.

This role is open to French professionals relocating to New York, with visa sponsorship provided by Quanteam.

Context

A leading international financial institution is expanding its New York technology team to support front-office electronic trading. The group builds and maintains high-performance platforms across multiple asset classes. The environment is trading-floor aligned, dynamic, and Agile-driven, offering direct interaction with traders, quants, and sales.

Role

As a C# Developer, you will contribute to the design, development, and enhancement of trading and pricing systems. Depending on business priorities, you may be staffed on initiatives related to US Rates, FX Flow, or broader Fixed Income pricing platforms. Your work will cover:

• Building scalable applications in C#/.NET for pricing, risk, connectivity, and reporting
• Enhancing existing electronic trading workflows to improve performance and usability
• Supporting real-time trading activity through close collaboration with front-office users
• Participating in modernization projects, including migration of legacy components to new platforms

Profile

• Strong experience in C# / .NET development (4.5+), with solid OOP skills
• Knowledge of electronic trading systems and workflows
• Exposure to one or more of the following domains: US Treasuries & Interest Rate Swaps / FX Flow trading / Fixed Income pricing and risk applications
• Additional skills: Python, SQL, Git, Agile/CI/CD; React/Angular a plus
• Strong problem-solving ability, proactive mindset, and comfort in fast-paced trading environments