[Remote] VoIP Operations Engineer (Mid-Level)
Note: The job is a remote job and is open to candidates in USA. Cuore Marketing is seeking a VoIP Operations Engineer to help operate and scale a carrier-grade voice platform. The role involves troubleshooting, incident response, and maintaining operational excellence while working with FreeSWITCH, Kamailio, and SIP carriers.
Responsibilities
- Operate and support a live VoIP platform
- Respond to alerts and troubleshoot incidents
- Debug SIP/RTP issues and call quality problems
- Participate in a light on-call rotation
- Work with carriers and vendors during incidents
- Improve monitoring, alerting and automation
- Support account executives with clear technical explanations
- Contribute to scaling and architecture decisions
- Identify cost-saving opportunities based on resource utilization
Skills
- 2+ Years Hands-on VoIP/Telecom/Voice Infrastructure experience, production exposure to FreeSWITCH and/or Kamailio and operating real-time systems in Linux environments
- Comfortable independently debugging FreeSWITCH, including Dialplans, gateways, SIP profiles, Codec negotiation, NAT handling, Log analysis and call failure diagnosis
- Comfortable independently debugging Kamailio, including SIP routing logic, Dispatcher/load balancing, Acting as a SIP proxy in front of media servers
- Full call flows (INVITE→BYE), Re-INVITEs, CANCELs, SIP error handling (4xx/5xx)
- SIP Tracing using sngrep, ngrep, packet captures, HOMER, Correlating multi-leg calls and Call-IDs
- RTP negotiation and flow, SDP analysis, codec mismatches, One-way/no-audio troubleshooting
- Understanding of Telco layer including Origination vs termination, DIDs, carriers, SBCs, SIP interconnects, Voice KPIs (ASR, ACD, PDD, MOS)
- Comfortable with wireshark and able to find and identify network issues
- Experience with AWS: EC2, security groups, basic VPC/networking
- Experience with Terraform: modify and maintain existing modules
- Experience with Ansible: configuration management and provisioning
- Experience with Docker: containerized services networking, volumes
- Experience with CI/CD: GitHub Actions, GitLab CI or similar
- Experience with Prometheus, Grafana, CloudWatch, or equivalents for Monitoring & Alerting
- Experience with Infrastructure dimensioning including CPU, memory, disk, network sizing, Capacity planning for growth and peak traffic
- Deep familiarity with configuration management tools (Ansible, Terraform) for infrastructure and service deployment
- Strong Linux command-line skills
- Reading and analyzing logs
- Network and system-level troubleshooting
- Comfortable operating on production systems
- Proficiency in at least one common scripting language (Python, Bash) for automating repetitive tasks, analyzing data, and performing system-level operations
- Strong written and verbal communication skills
- Ability to explain complex technical issues clearly and calmly
- Comfortable presenting conclusions backed by data
- Understands the difference between: facts, assumptions and hypotheses
- Clear and professional communication during incidents
- Homer/HEP
- Redis or message queues
- Bash or Python scripting
- STIR/SHAKEN, fraud detection or call analytics
- Strong proficiency in Python for systems automation, tooling and data analysis
- Advanced Bash/Shell scripting skills for routine operations and troubleshooting
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