Senior C# .NET Developer (Trading Systems)

  •  Vacaturenummer: 234945
  •  Geplaatst: 15 mei 2026
  •  Soort dienstverband: Tijdelijk
  •  Salaris: € 6000 - € 7800
  •  Opleiding: HBO
  •  Ervaring: Medior
  •  Fulltime/Parttime: 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.

Dit ga je doen

  • 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.

Hier ga je werken

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.

Dit neem je mee

  • 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 werft, bemiddelt en detacheert finance professionals en salarisadminstrateurs van startende professionals tot topsegment managementniveau. Dat doen wij door goed te kijken naar de wensen en behoeften van zowel de opdrachtgever als de professional. Daarnaast zijn we er voor bemiddeling van zzp’ers en het vervullen van vaste posities in diverse sectoren. Jefferson Wells is onderdeel van ManpowerGroup, één van 's werelds meest ethische bedrijven.
Utrecht