Motorola Solutions
Software C# Engineer
Remote Software Engineering role with clear candidate location fit.
PostedJul 4, 2026
Eligible countries38 accepted countries
Seniority signalSenior
Work settingRemote
Accepted candidate locations
Role overview
Software C# Engineer
Requirements and responsibilities
Readable role content extracted into sections for faster review.
Core Responsibilities
- SIP Signaling & Session Management: Develop C# components for high-concurrency SIP sessions, managing complex headers and MIME bodies to support features like "First-to-Answer" and Group Regroups.
- Real-Time Media Plane: Implement RTP/RTCP media handling for Mission Critical Voice (MCPTT) and Video (MCVideo), ensuring seamless floor control (transmission rights) in half-duplex environments.
- Data & Configuration: Build handlers for MCData services (SDS, File Distribution) using HTTP and SIP MESSAGE requests, and manage XCAP retrieval logic for XML configuration documents.
- Secure Communications: Integrate OIDC authentication flows and MIKEY-SAKKE encryption to ensure media transport remains secure and resilient.
Technical Essentials
- C# / .NET Framework / .NET Core Mastery: 3+ years of professional experience with a deep focus on asynchronous network programming.
- .NET Frameworks Experience: WCF, SignalR, EF, ASP.NET, WebAPI
- Protocol Expertise: A solid understanding of the SIP Protocol Stack (INVITE, PUBLISH, SUBSCRIBE, etc.) and experience with RTP/RTCP stacks.
- Data Handling: Proficiency in parsing complex XML schemas (XSD) and handling multipart/mixed MIME bodies.
- Software Engineering Principles: Strong grasp of OOP, SOLID principles, and modern CI/CD workflows (Git, Pull Requests, Agile).
Preferred (The "Nice to Haves")
- 3GPP Standards: Familiarity with TS 24.379 (MCPTT) or related MCX standards.
- Security: Experience with SRTP, TLS, or Key Management lifecycles (KMS).
- Domain Knowledge: Previous experience with UK Police Control Room environments or the Emergency Services Network (ESN).
Preferred (The "Nice to Haves")
- Competitive salary and bonus schemes
- Two weeks of additional pay per year (holiday bonus)
- 25 days holiday entitlement + bank holidays
- Attractive defined contribution pension scheme
- Private medical insurance
- Employee stock purchase plan
- Flexible working options
- Life assurance
- Enhanced maternity and paternity pay
- Career development support and wide-ranging learning opportunities
- Employee health and wellbeing support EAP, wellbeing guidance etc
- Carbon neutral initiatives/goals
- Corporate social responsibility initiatives including support for volunteering days
- Well-known companies discount scheme
Similar roles
Keep a backup shortlist.
CI/CD 8 accepted countries
Senior Mobile QA EngineerSubway EcommerceView role CI/CD 8 accepted countries
Senior QA Automation EngineerSubway EcommerceView role CI/CD 8 accepted countries
Application Security EngineerMorgan StanleyView role .NET 8 accepted countries
Senior Full Stack EngineerFionetView role Stack
Use these tags to compare similar remote roles.
Location eligibility
Candidates should apply only when their profile country is listed here.
Your profileCountry not setSign in to check your country against this role.
View all 38 accepted countries
Hiring flow
WithMira shows the role, then sends candidates to the company application.
1Check role fit, stack, and location eligibility in WithMira.
2Open the company application page from the tracked apply link.
3Save the role or subscribe for similar opportunities before leaving.