C#/.Net Developer

Mid • Remote

110 - 140 PLN

Krakow, Poland

Responsibilities

Develop and maintain C#/.NET components for real-time voice, video, and data
Implement new features within existing communication services
Work with SIP signalling, session handling, and network communication
Build secure, low-latency, highly reliable services
Collaborate with distributed Agile teams
60–70% hands-on development

Requirements

3+ years of experience with C# / .NET (Framework and Core)
Strong experience in asynchronous and network programming
Hands-on experience with ASP.NET, WebAPI, SignalR, and WCF
Experience with Telecom / radio interfaces (3GPP)
Solid understanding of SIP protocols; exposure to RTP / RTCP
Experience with real-time voice/video systems
Experience working with XML (XSD) and structured data formats
Good engineering fundamentals: OOP, SOLID, CI/CD, Git, Agile
Basic SQL database knowledge

Nice to have

Experience with Atos or Mitel solutions
ASP.NET web application experience

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.

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