Senior Technical Support Engineer – SIP, VoIP, FoIP
Location
Pennsylvania
Posted
67 days ago
Salary
0
Seniority
Senior
Job Description
Senior Technical Support Engineer – SIP, VoIP, FoIP
T38Fax Incorporated
• Provide Escalated (Tier 3) support for FoIP and SIP-related technical issues via email, phone and case management system (Zendesk). • Diagnose and troubleshoot SIP signaling, call setup failures, one-way audio, jitter, latency, and packet loss. • Analyze SIP traces, PCAP captures, and logs using tools like Wireshark and tcpdump. • Support T.38 Fax Over IP (FoIP) implementations, troubleshooting failed fax transmissions and improving reliability. • Work with PBX systems (Asterisk, FreePBX, 3CX, etc.), VoIP gateways, and SBCs. • Assist customers with network configurations, NAT traversal and firewall rules. • Escalate complex issues to engineering teams and collaborate with vendors as needed. • Take ownership of reported customer issues and see problems through to resolution, ensuring proper recording and closure of all issues. • Write documentation, knowledge base articles and FAQs, and document troubleshooting steps, best practices and solutions in the company's knowledge base for use by both internal staff and customers. • Test interoperability of new VoIP/FoIP equipment and create user guides for various IP-PBX and SIP-compatible devices for use with our SIP Trunking service.
Job Requirements
- Bachelor's Degree in Computer Science or related field, or combination of education and experience may be considered.
- Solid understanding of networking fundamentals (TCP/IP, DNS, DHCP, NAT, VPNs and firewall rules) and networking protocols, in particular VoIP/SIP.
- Experience with fax and/or FoIP a plus.
- Experience with Wireshark.
- Experience with Asterisk, Kamailio, FreeSWITCH, OpenSIPS, or cloud-based VoIP APIs (Twilio, Plivo, Telnyx, etc.).
- Working knowledge of Linux/Unix Operating System.
- Careful, methodical approach to troubleshooting complex technical issues.
- Experience with help desk ticketing systems (Zendesk, Jira, ServiceNow, etc.).
- Excellent written and verbal communications including the ability to explain complex technical concepts to customers.
- Excellent customer-facing skills.
Benefits
- Competitive salary with annual profit-sharing bonus
- Casual, informal work environment
- Flexible working arrangements (remote/hybrid options)
- Generous PTO allowance
- Healthcare
- 401(k)
- Flyers tickets with VIP parking
- A team of aces
- An open mind for new ideas and methodologies
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