Technical Lead (.NET WinForms) @ CSHARK Sp. z o.o.

Our client is a top-tier proprietary trading firm known for building its own trading technology from the ground up. Their in-house engineering team designs and maintains high-performance Windows desktop applications that traders rely on daily. As a Tech Lead , you’ll combine technical depth with hands-on coding and architectural decision-making to ensure scalability, performance, and an exceptional user experience.

IN SHORT :

🌎 100% remote or from the office (Wrocław, Bielsko-Biała) - You choose!

💰 150 - 190 PLN / h

☑️ B2B contract

💻 >

8 years of commercial programming experience

The Essentials We're Seeking

• 8+ years  of professional experience in  C# / .NET  with strong focus on  Windows Forms .
• Proven ability to  build custom UI controls from scratch  (inheriting base controls and implementing  custom rendering , not configuring DevExpress / Telerik).
• Hands-on experience with  continuous real-time data streaming  to the UI ( data pushed , not polled or periodically refreshed).
• Deep understanding of  multi-threaded UI architecture  (safe UI updates from worker threads, no freezes or stalled redraw).
• Demonstrated skill in  UI performance tuning  (batching updates, reducing paint cost, minimizing flicker, lowering GC pressure).
• Experience working with  TCP /  socket communication  and interacting with  C++ backend  systems.
• Ability to  explain design decisions clearly  and articulate the  impact on end-user experience .
• Strong communication skills and experience mentoring or leading developers.
• Fluency in English  (minimum  C1 ) to collaborate effectively with stakeholders.

Our client is a top-tier proprietary trading firm known for building its own trading technology from the ground up. Their in-house engineering team designs and maintains high-performance Windows desktop applications that traders rely on daily. As a Tech Lead , you’ll combine technical depth with hands-on coding and architectural decision-making to ensure scalability, performance, and an exceptional user experience.

IN SHORT :

🌎 100% remote or from the office (Wrocław, Bielsko-Biała) - You choose!

💰 150 - 190 PLN / h

☑️ B2B contract

💻 >

8 years of commercial programming experience

,[Lead the architecture and development of real-time WinForms applications. , Design and build custom-rendered controls for high-frequency, data-driven UI. , Ensure ultra-responsive UI updates in a multi-threaded environment. , Profile, debug, and optimize UI performance (latency, GC pressure, redraw behavior). , Work closely with traders and C++ backend teams to deliver reliable, low-latency features. , Mentor engineers through reviews, design sessions, and technical coaching. , Work with source control and support transition plans (e.g., SVN to Git). ] Requirements : C#, .NET, Windows Forms, SVN, Git, TCP, C++