.NET WinForms Developer

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 Your Daily Missions Design, implement and optimize custom WinForms controls (charts, grids, interactive visualization components). Work with continuous real-time data streams and ensure ultra-responsive UI under load. Ensure smooth multi-threaded UI updates without blocking or freezing.

Collaborate with backend engineers (C++ systems) to maintain low-latency TCP/socket communication . Profile, debug, and tune rendering performance (GC pressure, paint cost, batching, flicker control). Improve engineering practices, and influence UI architecture and usability.

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 und