Senior Systems Engineer (Linux & VoIP/Asterisk Development)
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Key skills for this role
About the Role
TGD Services DMCC seeks an experienced Systems Engineer to design, build, and secure next-generation communication infrastructure. You will architect enterprise-grade systems including an Asterisk phone system with AGI scripting and RealTime Architecture.
Key Skills for This Role
Responsibilities
- Design and deploy a highly scalable, resilient, Asterisk based PBX/VoIP platform from scratch on Linux environments (Ubuntu, Debian, or CentOS)
- Develop, maintain, and optimize custom AGI scripts (using Python, PHP, Perl, or Bash) to handle complex routing, IVR logic, and third party API/CRM integrations
- Architect and maintain Asterisk RealTime Architecture (ARA) backends using MySQL to dynamically manage SIP peers, extensions, voicemails, and dial plans
- Implement strict security frameworks to protect the platform from external intrusion, including Fail2ban, custom iptables firewalls, and SIP TLS/SRTP encryption
- Monitor, troubleshoot, and tune Asterisk and the underlying Linux kernel for low latency, jitter management, high concurrency, and optimal audio quality
- Manage SIP trunking, dial plans, and WebRTC integrations, while handling carrier level troubleshooting using packet capture tools such as Wireshark and sngrep
Requirements
- 4+ years of hands on experience with Asterisk architecture, advanced dial plan configuration, AGI scripting, and Asterisk RealTime (ARA)
- Strong proficiency in Linux system administration, shell scripting, and core software development (Python, PHP, or C/C++ preferred)
- Deep understanding of SIP, RTP, RTCP, WebRTC, and codec negotiation (G.711, G.729, Opus)
- Strong knowledge of SQL database design, optimization, and clustering for high availability Asterisk RealTime environments
- Proven experience defending VoIP networks against SIP scanning, registration brute forcing, SQL injection via AGI, and DDoS attacks
- Experience implementing TLS for SIP signaling and SRTP for media encryption
- Familiarity with network security tools like Fail2ban, iptables, and Snort/Suricata
Full Job Posting
Role Overview
- Seeking an experienced Systems Engineer with deep Linux Development and security expertise to design, build, and secure next generation communication infrastructure.
- Responsible for architecting enterprise grade systems, including an Asterisk phone system leveraging AGI scripting and Asterisk RealTime Architecture (ARA).
- Critical component is security: hardening Linux and Asterisk environments against external intrusions, toll fraud, and DDoS attacks.
Key Responsibilities
- Architecture & Development: Design and deploy a highly scalable, resilient, Asterisk based PBX/VoIP platform from scratch on Linux environments.
- Dynamic Call Control (AGI): Develop, maintain, and optimize custom AGI scripts for complex routing, IVR logic, and third party API/CRM integrations.
- Database Integration (RealTime): Architect and maintain Asterisk RealTime Architecture (ARA) backends using MySQL.
- Platform Hardening & Security: Implement strict security frameworks, deploy Fail2ban, custom iptables firewalls, and SIP TLS/SRTP encryption.
- System Optimization: Monitor, troubleshoot, and tune Asterisk and Linux kernel for low latency, jitter management, high concurrency, and optimal audio quality.
- Maintenance & Operations: Manage SIP trunking, dial plans, and WebRTC integrations, using packet capture tools like Wireshark and sngrep.
Required Skills & Qualifications
- Systems Engineering: 4+ years of hands on experience with Asterisk architecture, advanced dial plan configuration, AGI scripting, and Asterisk RealTime (ARA).
- Linux Development: Strong proficiency in Linux system administration, shell scripting, and core software development (Python, PHP, or C/C++ preferred).
- Network Protocols: Deep understanding of SIP, RTP, RTCP, WebRTC, and codec negotiation (G.711, G.729, Opus).
- Database Management: Strong knowledge of SQL database design, optimization, and clustering for high availability Asterisk RealTime environments.
- Security & Hardening: Proven experience defending VoIP networks against SIP scanning, registration brute forcing, SQL injection via AGI, and DDoS attacks.
- Experience implementing TLS for SIP signaling and SRTP for media encryption.
- Familiarity with network security tools like Fail2ban, iptables, and Snort/Suricata.
Preferred (Nice to Have)
- Experience with SIP Proxies or Load Balancers like Kamailio or OpenSIPS.
- Knowledge of containerization (Docker, Kubernetes) for VoIP microservices.
- Familiarity with compliance frameworks regarding call recording and data protection.
Core Competencies
- Problem Solving: Exceptional analytical and debugging skills, including reading core dumps and analyzing sngrep logs.
- Security First Mindset: Intolerant of security loopholes, builds infrastructure under the assumption that threat vectors are constantly active.
- Collaboration: Ability to work closely with web development teams to bridge VoIP systems with internal software dashboards.
Compensation
- Pay: AED12,000.00 AED15,000.00 per month
Job Type
- Full time, Permanent
Work Location
- In person
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