C# Developer - Fixed Income e-Trading Front Office

A Fixed Income electronic trading platform used daily by traders: real-time pricing, RFQ, execution, with genuine front office skills development.

Paris / Île-de-France

Permanent contract

3+ years of experience

Capital markets

An e-trading platform used by traders

The team builds and evolves a strategic Fixed Income electronic trading platform within an international investment bank. It covers the full pre-trade front office chain: real-time pricing, RFQ and RFS, auto-quoting, electronic execution, STP booking and post-trade monitoring.

The constraints are those of a market-facing application: performance, reliability, auditability and software quality.

From pricing to execution, with a real learning curve

Developing and evolving the interest rate swap pricing engine.

Implementing business workflows: pricing, quoting, execution, booking, monitoring.

Building the RFQ and RFS modules along with auto-quoting mechanisms.

Integrating market data feeds and contributing prices to internal and external order books.

Price validation and consistency modules: anomaly detection, automatic fallback, auditability.

Optimising latency-sensitive components over a high-performance messaging bus.

Contributing to the migration from .NET Framework to modern .NET versions.

Technical environment

C#

.NET Framework and .NET 8

WPF / MVVM

Solace PubSub+

Market data

NUnit

Appium

TDD

Azure DevOps

SonarQube

The context is heavily industrialised: automated testing, continuous integration, progressive deployments.

Who we are looking for

C# developer with at least three years of experience.

Initial exposure to the front office or to pricing and e-trading applications is an advantage.

Failing that, a clear interest in real-time systems, performance and critical applications.

A wish to understand the front office business and the effect of code in production.

Professional English.

Why this role is worth your time

It is a genuine entry point into the front office, on a pre-trade topic where performance matters.

The application is used daily by traders: feedback is immediate.

Skills development is progressive and supported, on e-trading, pricing and .NET performance.

You get the full technical context before any interview with the client.

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