.NET WinForms Developer
Posted Updated
We are looking for an experienced .NET WinForms Developer to join the frontend engineering team and help build high-performance, real-time trading applications used by professional traders.
This role is not about configuring UI frameworks - it is about crafting fast, responsive, custom-rendered desktop UI.
In short:
- 100% remote or from the office (Wrocław, Bielsko-Biała) - You choose!
- 125-140 PLN/h
- B2B Contract
- >5 years of commercial programming experience
The Essentials We're Seeking
- 5+ years of hands-on experience developing desktop applications in C#/.NET (preferably .NET 8).
- Strong expertise in Windows Forms.
- Proven experience building custom UI controls from scratch (inheriting from base controls and implementing custom rendering - not configuring DevExpress/Telerik/Infragistics).
- Experience working with continuous real-time data streams, where data is pushed to the UI (not periodic refresh).
- Strong understanding of multi-threaded UI applications (updating UI safely from worker threads, avoiding freezes and stalls).
- Practical experience in UI performance optimization (reducing redraw cost, minimizing GC pressure, batching updates, preventing flicker).
- Experience working with TCP / socket-based communication.
- Ability to clearly explain previous UI design decisions, trade-offs, and the impact on end users.
- Fluency in English (minimum B2+).
- Experience with trading systems, market data, or real-time financial applications.
- Familiarity with C++ or interoperability between C# and native components.
- Understanding of high-performance visualization and data interaction patterns.