C#/.Net Developer

Mid • Remote

110 - 140 PLN

Warsaw, Poland

Responsibilities

Design, develop, and maintain C#/.NET components for real-time voice, video, and data communication systems
Implement new features within existing mission-critical communication services
Work hands-on with SIP signalling, session management, and network communication layers
Build secure, low-latency, highly reliable services for real-time environments
Contribute to systems handling real-time voice and video streams
Collaborate with distributed Agile teams across the UK and Europe
60–70% hands-on development within a long-term product environment

Requirements

3+ years of experience with C# / .NET (Framework & .NET Core)
Strong skills in asynchronous and network programming
Hands-on experience with ASP.NET, WebAPI, SignalR, or WCF
Experience with SIP signalling and session handling
Exposure to real-time voice or video systems (RTP/RTCP is a plus)
Background in telecom or real-time communication environments
Experience working with XML (XSD) and structured data
Solid engineering fundamentals (OOP, SOLID, Git, CI/CD, Agile)
Basic SQL knowledge

Harvey Nash Technology

Harvey Nash Technology is a dynamic and fast-growing company operating in the technology industry. The company is committed to innovation and excellence, focusing on developing cutting-edge technology solutions. Harvey Nash Technology values collaboration, problem-solving, and effective communication, which are integral to its mission of delivering impactful and scalable technology solutions. The company is known for its expertise in modern web development, cloud environments, and data integration, making it a leader in the tech space. With a strong emphasis on responsive and scalable applications, Harvey Nash Technology is dedicated to meeting the evolving needs of its clients and stakeholders.

Check if your resume is ATS-ready before applying →Build an ATS-optimized resume