Oussama Hammami
Senior SIP Engineer at Rebtel
Nidau, Bern, Switzerland
Summary
👤
Senior🎓
Top SchoolOussama Hammami is a Senior SIP Engineer with 14 years’ experience designing and operating large-scale VoIP and cloud-based communications platforms. He architected Rebtel’s global SIP/WebRTC solution handling over a billion minutes per year and leads voice quality, optimization and charging integrations across distributed systems. Deeply versed in Linux/Unix server architecture, high-availability design, SIP stacks (Asterisk, Kamailio) and F5 load-balancing, he pairs hands-on systems integration with automation and monitoring at scale. His background spans full lifecycle delivery from on-prem deployments and PBX/SMS gateways to cloud-native signaling and conferencing. Based in Nidau, Switzerland, he combines operational rigor with an eye for lean operating strategies and tooling partnerships to keep complex calling platforms efficient and resilient. An understated strength is his experience bridging product, billing and network teams to translate telecom requirements into auditable, production-ready systems.
14 years of coding experience
7 years of employment as a software developer
Master of advanced studies, Information and communication technologies, Master of advanced studies, Information and communication technologies at HEIG-VD
Github Skills (40)
cdr9
sip9
google-cloud9
correlation9
rtc9
encapsulation9
docker8
sysctl8
certificate8
centos8
networking8
voip8
opensips8
coturn8
telephony8
Programming languages (7)
Github contributions (5)
oussamahammami/RTPEngine-EL
Aug 2017 - Oct 2019
Contributions:3 pushes, 1 branch in 2 years 2 months
oussamahammami/Linux-Tuning-SIP-Servers
Jan 2019 - Jan 2019
Optimizing System Performance for SIP servers
Contributions:6 commits, 7 pushes, 1 branch in 2 days
sipsip-servercentossysctllimits
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