Senior C# .NET Developer (Trading Systems), Amsterdam

Overview

Step into a high-impact engineering role at the heart of a mission-critical trading platform powering global financial markets. You will build and optimize low-latency systems where every millisecond matters, directly influencing real-time trading performance. This is a rare opportunity to combine deep technical challenges with tangible business impact.Responsibilities

Develop and maintain high-performance trading applications using C# and .NET; Build and integrate real-time communication solutions using FIX protocol, WebSockets, and messaging systems; Design and implement scalable, low-latency architectures; Collaborate with international teams across multiple time zones;Contribute to front-end components using Angular, Blazor, or React; Ensure system reliability through testing, monitoring, and incident management; Document technical flows, APIs, and trading logic clearly. Qualifications

Experience with C# and .NET; Familiarity with building reliable, high-performing applications; Experience working with APIs and integrated systems; Comfortable working in a fast-paced and dynamic environment; Strong communication skills and ability to collaborate with international teams; Experience in a larger or complex IT environment.Nice to have

Knowledge of FX trading systems and FIX protocol Affinity with mathematical concepts or trading calculations Benefits and engagement

All-in yearly salary up to approximately€95,000 (depending on experience); 12-month contract with option to extend; Hybrid working model (minimum 2–3 days on-site); International working environment with global collaboration; Opportunity to work on mission-critical trading systems; Access to professional development and knowledgesharing.

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