Linux VoIP SysAdmin

Linux + VoIP Systems Administrator

For recruiters, BPOs, and staffing agencies

• WLC is not accepting third-party submissions for this role at this time.

Full-time | Long-term | Contract | Fully remote

• WLC is seeking 2 strong Linux + VoIP Systems Administrators to join our Infrastructure Engineering, Operations, and Planning team. This role reports to the Manager of Infrastructure.
• We are looking for experienced, independent operators who can make sound technical decisions, work safely in production, troubleshoot complex issues end to end, and improve the stability, security, and maintainability of our Linux-based voice infrastructure.

Schedule

• Monday through Friday during normal business hours aligned to U.S. Eastern Time, including seasonal shifts between EST (UTC-5) and EDT (UTC-4)
• Occasional after-hours maintenance work as needed and scheduled in advance

What you will do

• Build, operate, maintain, and improve Linux-based infrastructure supporting customer-facing services
• Administer and troubleshoot VoIP platforms and SIP signaling in production environments
• Support high-availability systems across production, lab, development, and pre-production environments
• Diagnose and resolve issues involving SIP, RTP, call routing, registrations, media flow, and related service dependencies
• Write and maintain shell scripts and tooling for automation, operational safety, and visibility
• Follow disciplined change management and production safety practices
• Help maintain secure, compliant infrastructure aligned with company standards and audit requirements
• Work effectively and independently in a remote environment while coordinating with the broader infrastructure team

Required qualifications

• 3+ years of hands-on Linux systems administration experience in a 24x7 production environment
• 3+ years of hands-on experience with VoIP SIP and RTP technologies, signaling and call flow troubleshooting, and one or more of FreeSWITCH, Asterisk, Kamailio, OpenSIPS, SER/OpenSER
• Strong operational judgment and a demonstrated ability to make safe changes in production
• Experience with Linux system services, patching, backups, logging, monitoring, access control, and security hardening
• Strong shell scripting skills for automation and operational support
• Experience working independently with minimal supervision
• Strong written English and clear technical communication
• Quiet, private, and secure remote workspace
• At least 2 reliable high-quality Internet connections
• Willingness to work on WLC-provided equipment

Strongly preferred

• Experience with centralized logging, monitoring, AAA, jump hosts, and change management processes
• Experience with KVM, VMware, Hyper-V, or other virtualization platforms
• Experience operating Linux workloads in cloud environments such as AWS, Azure, or Google Cloud
• Experience working in regulated or audited environments such as ISO 27001, SOC 2, HIPAA, GDPR, and PCI

What success looks like in this role

• You can troubleshoot Linux and VoIP issues methodically without creating unnecessary production risk
• You escalate when appropriate, but you do not require constant direction
• You document your work, communicate clearly, and make careful changes
• You look for durable fixes, not just quick ones

Job Types: Full-time, Contract
Contract length: 1-180 months

Pay: Rs10,000.00 - Rs100,000.00 per week

Application Question(s):

• If the role was offered to you, how quickly could you start working (in calendar days)?
• Do you have a quiet, private, and secured location to work remotely out of, with at least 2 reliable and good quality Internet connections?
• You agree and accept that the position is Mon-Fri normal daytime business hours following the seasonal EST(UTC-5) and EDT(UTC-4) time zones?
• Do you agree to having a background check performed on you? This role requires individuals with non-negative background check results.
• Do your resume and LinkedIn profile make it clear that you meet or exceed the requirements outlined in the job description?
• What is your expected weekly income, in US dollars, for a 40-hour work week? This is what you regularly invoice us for, excluding maintenance, on call, or after-hour extra work time.
• You are comfortable working in, adhering to, building, and maintaining, a strict ISO 27001, HIPAA, PCI, GDPR, and SOC2 compliance environment?
• You are applying to this position for yourself? This means you, and only you, will be performing the work.
• Do you have 3+ years of hands-on experience as a lead Linux SysAdmin in a 24x7 high availability environment, without downtime, data loss, or blind spots?
• Do you have 3 or more years of engineering experience with FreeSWITCH, Asterisk, Kamailio (OpenSER), OpenSIPS, and/or SER?

Work Location: Remote