Senior C# .NET Developer (Trading Systems)

  •  Reference Number: 234945
  •  Posted: 17 april 2026
  •  Form of employment: Tijdelijk
  •  Tarief: € 6000 - € 7800
  •  Opleiding: HBO
  •  Ervaring: Medior
  •  Job Type: Fulltime
  •  Specialisatie: Developer

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.

Functieomschrijving

  • 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.

Over het bedrijf

You will be part of an international financial organization operating in a highly dynamic and technology-driven environment. The company focuses on delivering reliable, high-performance systems that support global trading operations. Collaboration, innovation, and precision are key elements of the culture, with teams distributed across multiple regions.

Functie-eisen

  • 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

Arbeidsvoorwaarden

  • 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 knowledge sharing.

jefferson Wells is Norway's largest consulting & recruitment company with over 800 consultants. We offer recruitment of managers and highly qualified consultants with expertise in IT. Among our customers, you will find over 90 percent of Norway's largest listed companies. Experis is part of ManpowerGroup and has been named one of the world's most ethical companies.
Utrecht