C# Front Office Developer

QUANTEAM - North America (RAINBOW PARTNERS Group); New York (NY); On-site; USD 100,000 - 130,000; Full time

Job summary

QUANTEAM - North America is seeking a skilled C# Developer to join a leading financial institution’s technology team in New York. The role involves building scalable C#/.NET applications for pricing and risk, enhancing trading workflows, and supporting real-time trading. Ideal candidates will have solid C#/.NET experience, knowledge of electronic trading systems, and a proactive mindset. Opportunities for collaboration with traders and quants are integral to this dynamic position.

Qualifications

• 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.

Responsibilities

• 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.

Skills

C#/.NET development

OOP

Problem-solving ability

Collaboration with front-office users

Knowledge of electronic trading systems

Tools

Python

SQL

Git

Agile / CI-CD

React

Angular

Job description

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
• 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