Senior Voice Operations Engineer

Rippling, Inc.; United States; On-site; USD 120,000 - 130,000; Full time

Benefits offered by this job

Flexible time off

Medical insurance

Dental insurance

Vision insurance

Fitness benefits

Job summary

Lumistry is seeking a Senior Voice Operations Engineer to operate, secure, and modernize the infrastructure behind Lumistry Voice. The distributed fleet includes about 8,000 Linux systems, running LAMP and voice services like Asterisk and FreePBX across cloud and on-site deployments.

This senior IC role requires deep Linux and VoIP expertise, with strong scripting, automation, and incident-response skills. Remote US-based work, with no on-call rotation, and a compensation range of $120k–$130k

Qualifications

• Bachelor’s Degree in a relevant field or equivalent experience.
• Senior-level Linux administration and troubleshooting across a large distributed fleet.
• Deep production experience with Asterisk, FreePBX, SIP, RTP, SDP, and IP telephony.
• Strong knowledge of TCP/IP, UDP, DNS, DHCP, NAT, routing, firewalls, VLANs, TLS, and Linux networking.
• Experience managing enterprise SIP phones, provisioning templates, firmware, trunks and escalations.
• Strong Bash, Python or similar scripting, with Git and configuration-management tooling.
• Sound communication, documentation practices, and a collaborative mindset.

Responsibilities

• Operate, secure, patch, and maintain ~8,000 Linux systems and voice services.
• Manage provisioning templates, configuration generation, firmware, certificates, remote deployments.
• Support carrier-grade SIP infrastructure: trunks, SBCs, DIDs, routing, E911, STIR/SHAKEN, caller ID.
• Automate fleet management, deployments, and recovery using scripts, APIs, Git, and CI/CD.
• Improve monitoring, runbooks, incident response, and root-cause analysis.
• Plan safe, staged deployments with validation and rollback procedures.
• Troubleshoot Asterisk, FreePBX, SIP, SDP, RTP, NAT, and related issues using logs and captures.
• Collaborate with Voice Eng., Platform Services, Customer Ops, Support, Product, and partners.

Skills

Linux admin

Asterisk

FreePBX

SIP/RTP/SDP

TCP/IP networking

Bash

Python

Git

Config mgmt

Documentation

Teamwork

Customer focus

Education

Bachelor's degree or equivalent

Tools

Yealink

Kamailio

OpenSIPS

FreeSWITCH

Puppet

Observability platforms

Job description

Lumistry serves over 9,000 pharmacies globally, helping them transform their businesses to improve adherence, reduce operating costs and increase revenue. We offer a collection of solutions purpose-built for pharmacies, enabling our customers to engage with their patients, consolidate vendors, improve patient health literacy, automate tasks and initiate online scheduling for programs and services. For more information, visit lumistry.com.

The Opportunity

The Senior Voice Operations Engineer will operate, maintain, and modernize the infrastructure behind Lumistry Voice. Our distributed fleet includes approximately 8,000 Linux systems, split roughly evenly between cloud-hosted virtual servers and single-board computers deployed in pharmacies. Most support LAMP applications, Asterisk, FreePBX, phone provisioning, and related telecommunications services.

This is a senior individual-contributor role for someone with deep, hands-on expertise in both Linux fleet operations and low-level SIP and Asterisk technologies.

What You’ll Own

• 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.

What You Bring

Required

• 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.

This position requires significant depth in both Linux and VoIP. Expertise in only one will not be sufficient.

Preferred

• Yealink or similar enterprise phone provisioning.
• Kamailio, OpenSIPS, FreeSWITCH, SIP proxies, or session border controllers.
• Puppet or similar fleet-management tooling, package repositories, and modern observability platforms.
• Experience modernizing legacy Linux, LAMP, Asterisk, or FreePBX environments.
• Healthcare, pharmacy, HIPAA, or another security- and privacy-sensitive environment.

Other Information About This Job

• This is a full-time individual-contributor position based remotely in the United States.
• There is no standing on-call rotation. Occasional after-hours work will be required for planned deployments and maintenance windows.
• The role offers the opportunity to establish technical standards and guide fleet modernization through expertise and influence.

Compensation

The approximate range for this position is $120,000 - $130,000, depending on experience and skills.

Lumistry offers a comprehensive benefits package, including flexible time off, medical, dental, vision, long-term disability coverage, fitness benefits, and more.

Diversity & Inclusion at Lumistry

Lumistry is an equal opportunity employer dedicated to an inclusive workplace. We prohibit discrimination and harassment based on race, color, religion, sex, sexual orientation, gender identity, national origin, disability, protected veteran status, pregnancy, or any other characteristic protected by law. This commitment applies to every part of employment, from recruiting and hiring to compensation and promotion. We base our decisions solely on qualifications, merit, and current business needs.

Accessibility

We’re happy to provide reasonable accommodations for qualified individuals with disabilities during the application and interview process. If you need assistance, please reach out.