Freelancer profile translated to English.
Back to original languageAbout Thierry
Asterisk / SIP / Flexisip Expert – Critical VoIP Debug & Architecture
For over 20 years, I have been working on complex IT and telecom infrastructures, with advanced specialization in VoIP and SIP protocols.
I assist companies, integrators, and publishers with critical issues where internal teams are stuck.
Main Expertise:
- SIP / VoIP Debugging (call drops, routing, interoperability)
- Asterisk (complex dialplan, AMI, ARI, optimization)
- Flexisip & modern SIP architectures
- TLS / SRTP / VoIP fraud prevention
- Linphone / SDK / mobile push integration
- Docker / cloud / on-premise deployment
Typical Intervention Cases:
- Unstable or degraded VoIP infrastructure
- Complex SIP bugs (clients, proxy, NAT, TLS)
- Reception problems / ghost calls / one-way audio
- Telecom architecture migration or redesign
- Security and compliance audits (GDPR / sovereignty)
My approach is pragmatic: quickly identify the blocking point and provide a lasting solution.
In parallel, I design sovereign communication solutions (open source, European hosting, end-to-end encryption).
Objective: to make your telecom infrastructure reliable, secure, and under your control.
Available for expert missions, audits, or targeted interventions.
English
Conversational
French
Native or bilingual
Can work on-site
Quincy-sous-Sénart (up to 50km), Paris (up to 40km)
Experience
- SAS ISYS TELECOMPresidentTELECOMMUNICATIONSJuly 2023 - Today (2 years and 11 months)Quincy-sous-Sénart, FranceProject Manager,Implementation of GAFAM-independent communication solutions, GDPR-compliant and hosted in Europe.These solutions are based on open source, end-to-end encryption, and controlled infrastructures (Asterisk, Flexisip, QNAP, Watchguard, OVH…).
- WEBOTIC EURLDirector - Principal Engineer - R&D -DIGITAL AND ITApril 2011 - Today (15 years and 2 months)Digital sovereignty expertise,Systems and networks, security, backup, IP telephony, administration, programming.
- ECOCUBEPrincipal Engineer - Technical Directorate - R&DDIGITAL AND ITDecember 2005 - July 2010 (4 years and 7 months)Boussy-Saint-Antoine, FranceDevelopment and management of the R&D team for the development of semi-industrial IT systems for internet telephony, via Open Source platforms, enabling phone calls worldwide via the Internet and all operator networks.
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