Software Engineer c#

Motorola Solutions is looking for a Software Engineer to join the Guardian team, developing a call taking & dispatching platform for emergency services. The role involves deep work with C# and .NET, focusing on high-concurrency SIP sessions, media handling, and secure communications.

• Develop C# components for high-concurrency SIP sessions, managing complex headers and MIME bodies to support features like 'First-to-Answer' and Group Regroups.
• Implement RTP/RTCP media handling for Mission Critical Voice (MCPTT) and Video (MCVideo), ensuring seamless floor control (transmission rights) in half-duplex environments.
• Build handlers for MCData services (SDS, File Distribution) using HTTP and SIP MESSAGE requests, and manage XCAP retrieval logic for XML configuration documents.
• Integrate OIDC authentication flows and MIKEY-SAKKE encryption to ensure media transport remains secure and resilient.

• 2+ years of professional experience with a deep focus on asynchronous network programming (C# / .NET Framework / .NET Core)
• WCF, SignalR, EF, ASP.NET, WebAPI
• Understanding of the SIP Protocol Stack (INVITE, PUBLISH, SUBSCRIBE, etc.) and experience with RTP/RTCP stacks.
• Proficiency in parsing complex XML schemas (XSD) and handling multipart/mixed MIME bodies.
• Strong grasp of OOP, SOLID principles, and modern CI/CD workflows (Git, Pull Requests, Agile).
• Familiarity with TS 24.379 (MCPTT) or related MCX standards.
• Experience with SRTP, TLS, or Key Management lifecycles (KMS).

• Private medical coverage
• Multisport
• Life insurance (two annual incomes)
• Employee Stock Purchase Plan – 15% discount for buying Motorola’s Stock units
• Employee Pension Plan – 3,5 % of the month’s gross salary, which goes to the retirement account
• IP Tax Relief (up to 80%)
• Yearly salary increase (depends on individual performance)
• Annual bonus (depends on company performance)
• Flexible working hours (usually the day starts between 8-10), 8 hours working day (30 minutes lunch break included)
• Hybrid work