Rahman Saaban — VoIP Architect & SRE

Advanced Support Engineer — Communications (APAC)

2025 – Present

IPC Systems

Support IPC Unigy trading communications platforms for fintech clients, working to maintain high uptime SLA
Troubleshoot turret issues, capture tcpdump on servers, and analyze packets using Wireshark to identify root causes
Monitor and troubleshoot SIP infrastructures, conducting SIP ladder analysis and RTP diagnostics
Manage Kubernetes deployments on KVM, troubleshoot issues, and ensure service recovery
Provide support for IPC soft clients, ensuring seamless user experience
Implement Nagios Core and Splunk for real-time VoIP system monitoring and proactive issue resolution

Senior UC and Infrastructure Engineer

2023 – 2025

Nubitel Technology Sdn Bhd

Managed on-premise infrastructure including Fortigate firewall, WAN/LAN switches, 10G switches, Dell and HP servers, QNAP storage, Microtik routers and Proxmox virtualization
Handled AWS cloud infrastructure (EC2, S3, Aurora DB) and domain management with Route 53 and GoDaddy
Deployed and maintained OpenSIPS, PostgreSQL, and MySQL databases
Implemented Wazuh, Prometheus and Grafana for infrastructure monitoring and security
Served as PIC for ISMS 27001, ensuring policy compliance across all departments
Conducted security awareness and ISMS training, prepared audit evidence and collaborated with SIRIM auditors
Managed a team of 4 handling core telephony systems, providing training and mentorship to ensure high uptime of SIP servers
Designed and deployed multi-tenant VoIP solution supporting numerous SIP endpoints using FreePBX, AudioCodes SBC and Telcobridges
Engineered secure SIP routing with in-depth diagnostics of signaling, media, headers and SDP across NAT and firewalls

Unified Communication Engineer

2021 – 2025

Nubitel Technology Sdn Bhd

Managed voice policies and configurations for PBX and Microsoft Teams systems
Deployed Aarenet Phone System, Teams Phone System, Yeastar, Sangoma, Epygi, AudioCodes SBC and Telcobridge SBC
Troubleshot UC platforms, SIP phones and soft clients to ensure optimal performance and user experience
Resolved contact center issues, including API integration and PostgreSQL database troubleshooting
Configured firewalls, switches, routers and network infrastructure, mentoring junior team members

System Engineer

2020 – 2021

EV Dynamic Sdn Bhd

Successfully deployed PBX System in the MRT Line 2 (Sungai Buloh-Serdang-Putrajaya), involving configuration of PBX System, Voice Recording System via RSPAN protocol, Voicemail System, and Network Monitoring System
Integrated PBX System with various systems including Voicemail system, radio system, public announcement system and CCTV system
Configured PBX Systems with PRI Line, implementing E1 failover configuration for enhanced reliability
Completed Phase 1 of the MRT Line 2 Project, covering the stretch from Sungai Buloh Depot to MRT Kampung Batu stations (1 Depot and 9 stations)

Assistant Project Engineer

2019

TQERA Systems Sdn Bhd

Worked in SCADA Team of TNB Contractor
Monitored and supervised the installation of Field Terminal Unit and Remote Terminal Unit in Stesen Suis 33kv
Prepared documentation for FAT, PAT and SAT
Managed company inventories and assisted project director with company claims and project timeline