Remote Senior Voice Infrastructure Engineer (Linux & SIP)

Rippling, Inc.; Northern (KY); Hybrid; USD 120,000 - 130,000; Full time

Benefits offered by this job

Flexible time off

Medical

Dental

Vision

Long-term disability

Fitness benefits

Job summary

Lumistry is seeking a Senior Voice Operations Engineer to operate and modernize the infrastructure behind Lumistry Voice, managing a distributed fleet of ~8,000 Linux systems across cloud and pharmacy endpoints. You’ll own the SIP, Asterisk, and FreePBX stack, ensure reliability, and collaborate across Voice Engineering, Platform Services, Customer Operations, and partners.

This remote, full-time role in the United States offers a competitive compensation package and benefits, with opportunities

Qualifications

• Bachelor’s Degree in relevant field or equivalent experience.
• Senior-level Linux administration and troubleshooting experience across a large or highly distributed production fleet.
• Deep production experience with Asterisk, FreePBX, SIP, RTP, SDP, and IP telephony, including the ability to read raw SIP messages, packet captures, dialplans, and end-to-end call flows.
• Strong knowledge of TCP/IP, UDP, DNS, DHCP, NAT, routing, firewalls, VLANs, TLS, certificates, and Linux networking.
• Experience managing enterprise SIP phones, provisioning templates, firmware, carrier trunks, number routing, and telecommunications escalations.
• Strong Bash, Python, or comparable scripting skills, with experience using Git and configuration-management tooling.
• Sound production judgment, clear communication, strong documentation habits, and a collaborative, team-first approach.
• A customer-focused, driven, curious, and accountable mindset.

Responsibilities

• Operate, secure, patch, and maintain approximately 8,000 Linux systems and the LAMP and voice services running on them.
• Manage phone provisioning templates, configuration generation, firmware, certificates, and remote deployments across multiple phone models.
• Support carrier-grade SIP infrastructure, including trunks, session border controllers, DIDs, routing, failover, E911, STIR/SHAKEN, caller ID, and carrier escalations.
• Automate fleet management, configuration, deployments, and recovery using scripting, configuration-management tools, APIs, Git, and CI/CD.
• Improve monitoring, alerting, runbooks, incident response, and root-cause analysis while eliminating recurring problems.
• Plan and execute safe, staged deployments and maintenance with clear validation and rollback procedures.
• Troubleshoot Asterisk, FreePBX, SIP, SDP, RTP, registrations, routing, transfers, IVRs, queues, voicemail, DTMF, NAT, and audio issues using logs, packet captures, and command-line tools.
• Collaborate with Voice Engineering, Platform Services, Customer Operations, Support, Product, and external telecommunications partners.

Skills

Linux administration

Asterisk

FreePBX

SIP

RTP/SDP

Bash/Python

Networking (TCP/IP)

Scripting

Education

Bachelor's degree or equivalent experience

Tools

Puppet

Git

OpenSIPS/Kamailio

Job description

Lumistry is seeking a Senior Voice Operations Engineer to operate and modernize the infrastructure behind Lumistry Voice, managing a distributed fleet of ~8,000 Linux systems across cloud and pharmacy endpoints. You’ll own the SIP, Asterisk, and FreePBX stack, ensure reliability, and collaborate across Voice Engineering, Platform Services, Customer Operations, and partners.

This remote, full-time role in the United States offers a competitive compensation package and benefits, with opportunities