Senior VoIP Engineer — VoIP Operations

Job Overview:

The Voice and Communications Engineer will operate, secure, and optimize enterprise VoIP, contact center, and messaging platforms across Asterisk/FreePBX, hosted PBX, carrier, and AWS environments. The role includes SIP and RTP troubleshooting, voice-quality monitoring, automation, API and CRM integrations, messaging compliance, and Tier-2/Tier-3 production support. The engineer will also support high availability, disaster recovery, security hardening, and continuous improvement of voice and messaging services.

Job Responsibilities:

• Operate, maintain, and harden production Asterisk/FreePBX clusters and PBX environments, including dialplans, queues, IVRs, trunks, and recording.
• Administer and support new deployments and the hosted GoToConnect PBX - provisioning, extensions, call flows, trunk configuration, and end-user troubleshooting.
• Manage SIP trunks and PSTN connectivity with carriers - provisioning, routing, LCR, DID/TFN management, and incident coordination.
• Monitor call-quality KPIs (ASR, ACD, MOS, jitter, packet loss, PDD) and lead remediation when SLAs are at risk.
• Operate VoIP and supporting workloads on AWS - EC2, VPC, security groups, Route 53, S3, CloudWatch, and related services.
• Maintain network reachability, NAT traversal, firewall, and QoS configurations to ensure stable RTP/SIP traffic.
• Manage backups, snapshots, patching, and disaster-recovery procedures for voice infrastructure.
• Build and maintain integrations between Asterisk and Custom in-house VOIP Portals and Dynamics 365 - click-to-call, screen-pop, call logging, contact sync, and CDR push.
• Integrate telephony with internal and third-party AI systems (voicebots, transcription, sentiment analysis, AI dialers, IVR automation).
• Operate and maintain messaging services across 10DLC SMS, longcode, shortcode, and fax, including carrier registration, brand/campaign compliance, throughput management, and DLR reconciliation.
• Maintain and support in-house web applications built on Laravel that interact with the telephony platform - bug fixes, minor enhancements, deployment, and operational support (deep Laravel development is not required, but the ability to navigate, debug, and modify the codebase is essential).
• Write Python and Bash automation for provisioning, configuration management, log parsing, CDR processing, health checks, and recurring operational tasks.
• Develop scripts and small tools that integrate Asterisk AMI/ARI, REST APIs (HubSpot, Dynamics, 3CX, GoToConnect, SMS gateways), and internal services.
• Build dashboards, alerting, and runbooks using tools such as Grafana, Zabbix/Nagios, Homer, sngrep, and CloudWatch.
• Reduce manual operations through automation - provisioning, user onboarding/offboarding, trunk failover, and routine audits.
• Harden VoIP and messaging infrastructure against toll fraud, SIP scanning, brute-force attempts, and abuse; manage TLS/SRTP, fail2ban, ACLs, and rate limits.
• Ensure adherence to 10DLC, CTIA, and TCPA requirements for messaging traffic, and applicable regulations for voice (E911 where relevant).
• Maintain accurate, version-controlled technical documentation, network diagrams, runbooks, and SOPs
• Act as Tier-2/Tier-3 escalation for voice, messaging, and integration incidents.
• Partner with development, NOC, and contact-center teams on rollouts, migrations, and continuous improvement.
• Participate in an on-call rotation for production voice and messaging services.

Qualifications:

• Bachelor’s or Master’s degree in Computer Science, Software Engineering, or a related field.
• 3-5 years of experience in enterprise voice engineering, working with Linux-based telephony platforms and scripting or programming languages for automation and system integration.
• Good understanding of Linux environments, including shell scripting, configuration, and system backups.
• Strong experience with Asterisk, FreeSWITCH, Kamailio/OpenSIPS, SIP proxies, and other open-source VoIP platforms.
• Working knowledge of WebRTC-based voice & video communication and open-source VoIP ecosystems.
• Deep understanding of SIP signaling, RTP/SRTP, DTMF, codecs, NAT traversal, and fax (T.38/Passthrough) troubleshooting.
• Strong knowledge of SIP trunking, carrier interconnects, DID provisioning, number portability, E911, and telecom regulations.
• Experience implementing high availability (HA), redundancy, failover, disaster recovery, and business continuity solutions for mission-critical voice platforms.
• Ability to interpret system diagrams, architecture blueprints, call flows, and carrier workflows across on-premises and cloud environments.
• Excellent verbal and written communication skills required for cross-functional coordination and vendor interaction.

Compensation and Benefits:

Financial:

• Competitive salary and bi-annual bonus.
• Fast track and uncapped career growth for high performers.
• Company-sponsored vehicle financing (car and bike).
• Interest-free loans.
• Provident Fund: CureMD matches up to 8% of your base salary.

Health and Wellness:

• In-house clinic with a team of certified male and female doctors with 24/7 telemedicine service.
• Hospital treatment monitoring by company doctors.
• Comprehensive health coverage for your immediate family (outpatient, inpatient, maternity and parents' inpatient).
• Exclusive health benefits and discounts at top class clinics and labs.

Supportive Workplace:

• Pick-up and drop-off services for female employees.
• In-house daycare facility.
• In-house gym and recreational area to unwind.

Continued Learning:

• Company-sponsored trainings, workshops, development programs and retreats.
• Paid specialized trainings/certifications.

The Difference You’ll Make:

At CureMD, every role, whether senior or junior, plays a pivotal part in transforming healthcare. By joining our innovative team, you’ll contribute to groundbreaking technology that directly impacts patient care, enhances healthcare efficiency, and saves lives globally. Your skills and passion will drive meaningful change, helping us deliver solutions that support healthcare professionals in critical, real-time settings. Together, we’re not just advancing technology - we’re making a tangible difference in people’s lives. Together, let’s save lives.