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# Senior Network & Systems Engineer (Tier 3) - Juniper & VoIP

- **Company:** Aerux LLP
- **Location:** United States (Remote available)
- **Experience:** Expert
- **Salary:** $130,000.0
- **Contract:** Permanent contract
- **Skills:** Systems Engineering, Border Gateway Protocol, VoIP, Internet Protocol, Internet Service Provider, Junos, Network Architecture, Network Diagrams, Routing, Open Shortest Path First (OSPF), Server Administration, Virtual Local Area Networks, Scripting, Juniper, 3-tier Architectures, Network Server
- **Published:** October 18, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=600d91c06155960d

## About the Role

* Advanced, hands-on Juniper and Junos administration and troubleshooting skills, with real examples of complex problems you have resolved.
 * Strong routing, switching, and IP networking fundamentals, including routing policies, BGP, OSPF, and VLANs.
 * Practical experience maintaining production servers, diagnosing outages, and managing backups and recovery.
 * Experience operating and troubleshooting VoIP services, with an understanding of SIP, RTP, and the network conditions that affect call quality.
 * Sound judgment in production environments, careful change management, and clear technical documentation.
 * Reliable communication, independent problem-solving, and ownership of results.

Helpful experience

Experience in an internet service provider or telecommunications environment, scripting or automation, and advanced Juniper certifications are welcome. Demonstrated hands-on expertise matters; equivalent practical experience is valued.

Location and work arrangement

Remote candidates are welcome, including applicants outside the United States. Candidates near Centennial, Colorado are also welcome. We will consider applicants based on demonstrated technical expertise, communication, and their ability to meet the role's operational needs. Employment or contract arrangements, availability, maintenance coverage, and compensation will be discussed with candidates before an offer.

## Description

Aerux Broadband is seeking a hands-on senior engineer to maintain and operate our network, server, and voice services. This role brings together advanced Juniper operations, server maintenance, and VoIP troubleshooting. We need someone who can own complex technical issues, make careful changes, and keep services reliable.

What you will do

 * Operate, configure, maintain, and troubleshoot Juniper network infrastructure.
 * Diagnose complex routing, switching, connectivity, and network performance problems.
 * Maintain server availability, performance, updates, configuration, and monitoring.
 * Verify backups, test recovery procedures, and restore services when systems fail.
 * Operate and troubleshoot VoIP services, including call quality, call routing, and connectivity issues.
 * Plan and implement infrastructure changes with testing, clear documentation, and rollback procedures.
 * Own Tier 3 technical escalations through resolution, document root causes, and prevent recurring problems.
 * Maintain network diagrams, configuration records, and practical runbooks; share knowledge so the team can support systems consistently.
 * Coordinate maintenance windows and incident response coverage according to the agreed work arrangement.