Telecom & Infrastructure Engineer

About ClearGrid

ClearGrid is on a mission to revolutionize the debt resolution industry. Were using AI automation and real-time data to completely rethink how debt collection works unlocking better outcomes for institutions and individuals alike. Think of us as rebuilding the collections starting from scratch with modern tools.

Were a fast-growing startup with ambitious goals and were looking for builders who are hungry to make a real dent in a space with massive untapped potential.

Role Overview

We are seeking a highly skilled and experienced Telecom & Infrastructure Engineer Voice & Telco Systems. This role owns the end-to-end telecom and voice infrastructure that connects onpremise telco providers (ISDN) to our cloudhosted PBX and AI systems. The engineer will be responsible for
designing maintaining troubleshooting and scaling voice connectivity while acting as the technical
owner for telco vendors especially across UAE and Saudi Arabia.

This role is not basic SIP administration. It is about:

• Owning real ISDN (E1/T1) connectivity

• Managing physical gateways and hybrid routing

• Controlling carrier quality and signaling integrity

• Supporting both AI-driven and human dialing systems

Current stack includes:

• Yeastar Cloud PBX

• Yeastar Dinstar GSM / ISDN gateways

• Fortinet VPN & Firewall

• ISDN PRI (E1) lines

• SIP trunk integrations

• AI voice platform connectivity

Key Responsibilities

E1 / PRI Ownership

Own and manage ISDN PRI (E1/T1) lines end-to-end including Q.931 signaling channel allocation DID/CLI mapping clocking framing and line error troubleshooting (CRC slips alarms). Scale multi-E1 deployments across locations.

Gateway & PBX Engineering

Configure and maintain Yeastar PBX and ISDN/GSM gateways. Manage hybrid routing (E1 GSM SIP) outbound dialing logic codec/DTMF handling and trunk failover.

SIP Media & Advanced Debugging

Debug SIP signaling RTP/RTCP media flows NAT traversal one-way audio and call setup failures using Wireshark SIP traces and gateway logs. Experience with OpenSIPS Asterisk/FreeSWITCH RTPengine SBC concepts SIPREC preferred.

Network & VPN for Voice

Manage Fortinet site-to-site VPNs and firewall rules for SIP/RTP traffic. Optimize IPSec performance resolve NAT/asymmetric routing issues and ensure low-latency media paths for high-concurrency dialing.

Carrier & Vendor Ownership (UAE & KSA Mandatory)

Directly manage telecom providers (DU Etisalat STC Salam Mobily Zain). Lead provisioning migrations and escalations. Ensure routing quality compliance (CLI/DID) and end-to-end service reliability without middlemen.

Requirements

• 5 years in telecom / voice engineering

• Strong hands-on E1/PRI troubleshooting experience

• Deep SIP & RTP debugging knowledge

• Direct carrier interaction experience (UAE & KSA required)

• Multi-site voice infrastructure scaling

Nice to Haves:

• AudioCodes / Sangoma / Patton gateway experience

• SBC deployment experience

• Fortinet firewall familiarity

• AWS networking basics

• AI voice or outbound dialer infrastructure exposure

Why Join ClearGrid

• Real ownership: Youll play a central role in building products that redefine how collections work in the future

• Massive industry impact: This is one of those rare spaces where almost everything is still to be built.

• High-growth team: Were scaling fast and the systems tools and processes you help create will shape our foundation.