.NET WinForms Developer

We are looking for an experienced .NET WinForms Developer to join the frontend team and help design, develop, and optimize high-performance trading applications.

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

• Develop, maintain, and enhance custom Windows Forms controls for real-time trading applications.

• Implement UI features that handle large, fast-changing datasets with minimal latency.

• Collaborate with traders and backend developers to translate business requirements into performant desktop solutions.

• Work with C++ backend systems over TCP/IP and ensure robust, low-latency communication.

• Profile, debug, and optimize code for responsiveness and performance.

• Contribute to continuous improvement of codebase, tooling, and processes.

The Essentials We're Seeking

• 5+ years of experience in C#/.NET (preferably .NET 8).

• Strong expertise in Windows Forms and UI customization.

• Solid understanding of asynchronous, multi-threaded, and event-driven programming.

• Experience with custom control development (charts, grids, real-time visualization).

• Familiarity with TCP/socket communication and debugging live systems.

• Ability to read and understand complex C++ or protocol integration logic.

• Strong collaboration skills and attention to detail.

• Fluency in English and Polish (minimum B2+) – a must.

Nice to Have

• Prior exposure to trading systems or market data environments.

• Understanding of performance-sensitive visualization, or C++ interoperability.

Reasons Why You Would Enjoy Working With Us

• We work in the latest technologies and with international clients, and our projects are polished from < to /> - learn about some of the projects we have completed.

• We organize TechTalks, meet-ups and create guilds where we exchange knowledge - you can learn a lot from your teammates.

• We have a close-knit team and we make sure to have regular integrations - we often go out to celebrate together.

• You can work remotely or choose to work from our offices in Wroclaw or Bielsko-Biala. However, we count on your openness to occasionally visit the office for team meetings or client visits, or possible occasional trips to the client's headquarters.

• You can adjust your working hours to suit your needs, starting your day between 7:00 and 10:00 am.

• You can work with great specialists in their fields who also have a sense of humor and other after-hours hobbies. It is the people who create the unique atmosphere and relaxed atmosphere at CSHARK.

• We have a flat structure - we are not a corporation and don't want to be one 🙃.

• We offer bonuses for employee referrals (from 3000 PLN to 7000 PLN).

• We organize remote English classes and provide access to the company library. You can also become an author/author of articles published on our technical blog - https://cshark.com/blog/.