Eseoghene S.
VoIP & SIP Engineer | Carrier Infrastructure | SBC | AI Voice
Working with telcos, SaaS companies, MSPs, and ITSPs; I design, build, and troubleshoot production-grade VoIP infrastructure — and connect it to the business systems that depend on it. My experience spans launching new multi-tenant voice platforms to troubleshooting complex SIP interoperability issues, integrating carriers, deploying Session Border Controllers (SBCs), and automating telecom operations through APIs. I mostly work with open-source technologies because they provide the flexibility and control needed to build scalable, cost-effective communications platforms. A recurring theme in my work is the point where telephony meets ERP and CRM. At one organisation I deployed FreePBX as a business contact centre alongside a full Odoo ERP rollout (CRM, contacts, invoicing, inventory, sales, purchasing) and a multi-user SuiteCRM deployment, then integrated them: call activity captured from Asterisk AMI and CDR data, and written back against the corresponding records through the Odoo API. I understand both the voice side and the business-systems side of that work, and the operational realities of keeping the two in step. I have experience designing and deploying solutions based on Asterisk, FreeSWITCH, Kamailio, OpenSIPS, RTPengine, FreePBX, FusionPBX, 3CX, Twilio, Telnyx, WebRTC, Odoo, SuiteCRM, and related technologies. Examples of work I have done include: • Multi-tenant UCaaS and hosted PBX platforms • SIP routing, carrier interconnects, SBC deployment, and NAT traversal • SIP trunk integration and interoperability troubleshooting • High-availability VoIP infrastructure • Contact centre deployment with call logging integrated into ERP and CRM platforms via Asterisk AMI/CDR and the Odoo API • Provisioning automation for users, phones, DIDs, trunks, and routing • REST API integrations and telecom workflow automation • AI voice platform integration using SIP and WebRTC • Production troubleshooting for call failures, registration issues, one-way audio, TLS, and media problems I enjoy solving the problems. Whether it's improving call reliability, integrating a new carrier, scaling an existing platform, connecting a phone system to the ERP or CRM behind it, or automating repetitive operational tasks, I focus on building solutions that are maintainable, well documented, and ready for real-world traffic. If you're looking for someone who understands both the technical details and the operational realities of running a VoIP platform, I'd be happy to discuss your project.
Earnings and projects
Last 6 months ÷ 6
Last 6 months: $3k
Billed in all: $10,999$11k
$610 in the last 6 months
Across 10 contracts
Earnings, last 30 days
Skill rankings: Top 9% in OpenSIPS
Ranked by MRR among everyone on Upwork with the skill.
- OpenSIPS35 freelancers · 🇳🇬 #1Top 9%🇳🇬#1 of 2
- #6Kamailio45 freelancers · 🇳🇬 #1Top 13%🇳🇬#1 of 3
- #15VoIP PBX85 freelancers · 🇳🇬 #1Top 18%🇳🇬#1 of 3
- #15FreeSWITCH85 freelancers · 🇳🇬 #1Top 18%🇳🇬#1 of 2
- #16FreePBX120 freelancers · 🇳🇬 #1Top 13%🇳🇬#1 of 4
- #263CX93 freelancers · 🇳🇬 #3Top 28%🇳🇬#3 of 4
- #29Session Initiation Protocol106 freelancers · 🇳🇬 #1Top 27%🇳🇬#1 of 2
- #35Asterisk211 freelancers · 🇳🇬 #2Top 17%🇳🇬#2 of 5