Senior VoIP Engineer

What You Will Do

• Design, build, and scale VoIP platforms using Asterisk, OpenSIPS, and SIP/RTP technologies
• Demonstrate an automation-first approach across build, deployment, and operational processes
• Develop and maintain backend VoIP services, APIs, and integrations using .NET (C#)
• Build, refine, and manage CI/CD pipelines using GitHub Actions for automated testing and deployments
• Support, maintain, and enhance engineering tools across Dev/Test/UAT/Prod
• Collaborate with cross-functional teams to onboard new applications and telephony features
• Troubleshoot SIP signaling, media issues, latency, and complex call flows
• Use metrics to identify improvements (SIP response codes, call quality, latency, queue times)
• Engineer scalable and resilient VoIP architectures leveraging AWS and IaC
• Enhance dialplans, routing logic, IVR workflows, call analytics, and VoIP integrations
• Provide on-call and after-hours support as required
• Mentor and coach colleagues

QualificationsWhat We Will Need from You

• Strong hands-on experience with Asterisk, OpenSIPS, and SIP telephony
• Solid understanding of SIP, RTP, VoIP protocols, and troubleshooting tools (sngrep, tcpdump, Wireshark)
• Experience working with AWS services and cloud-native principles
• Experience building and maintaining CI/CD pipelines (preferably GitHub Actions)
• Proficiency in .NET/C# development for backend telephony applications
• Experience with Infrastructure-as-Code (Terraform preferred)
• Strong Linux systems experience and scripting abilities
• Familiarity with monitoring tools
• Experience with Docker or containerized workloads
• Strong communication skills and ability to learn quickly

Bonus Points

• Advanced .NET/C# experience in real-time communication or distributed systems
• Experience developing or integrating REST APIs and microservices for VoIP platforms
• Knowledge of WebRTC or media gateway technologies
• Experience with advanced Asterisk dialplan logic, AGI/ARI, call queues, IVRs

Hands-on experience with OpenSIPS routing scripts, clustering, or load balancing